Configuration Guide - Interface Management(V200R002C00_01)

Huawei AR200-S Series Enterprise RoutersV200R002C00

Configuration Guide - InterfaceManagement

Issue 01

Date 2011-12-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 01 (2011-12-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

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http://www.huawei.com

mailto:[email protected]

About This Document

Intended AudienceThis document provides the basic concepts, configuration procedures, and configurationexamples of the interfaces supported by the AR200-S.

This document is intended for:

l Data configuration engineersl Commissioning engineersl Network monitoring engineersl System maintenance engineers

Symbol ConventionsThe symbols that may be found in this document are defined as follows.

Symbol Description

DANGERIndicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.

WARNINGIndicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

CAUTIONIndicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.

TIP Indicates a tip that may help you solve a problem or savetime.

NOTE Provides additional information to emphasize or supplementimportant points of the main text.

Huawei AR200-S Series Enterprise RoutersConfiguration Guide - Interface Management About This Document


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Command ConventionsThe command conventions that may be found in this document are defined as follows.

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

&<1-n> The parameter before the & sign can be repeated 1 to n times.

# A line starting with the # sign is comments.

Interface Numbering ConventionsInterface numbers used in this manual are examples. In device configuration, use the existinginterface numbers on devices.

Change HistoryUpdates between document issues are cumulative. Therefore, the latest document issue containsall updates made in previous issues.

Changes in Issue 01 (2011-12-30)Initial commercial release.

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Contents

About This Document.....................................................................................................................ii

1 Interface Overview........................................................................................................................11.1 Interface Types...................................................................................................................................................21.2 Interface Numbering...........................................................................................................................................4

2 Interface Basic Configuration.....................................................................................................52.1 Basic Interface Configuration.............................................................................................................................62.2 Basic Interface Configuration Supported by the AR200-S................................................................................62.3 Configuring an Interface Description.................................................................................................................62.4 Configuring the Interval for Collecting Traffic Statistics on an Interface..........................................................7

2.4.1 Establishing the Configuration Task.........................................................................................................72.4.2 Setting the Global Interval for Collecting Traffic Statistics......................................................................82.4.3 Setting the Interval for Collecting Statistics of Traffic on an Interface....................................................82.4.4 Checking the Configuration.......................................................................................................................9

2.5 Maintaining Interface Basic Configuration......................................................................................................102.5.1 Monitoring Interface Information............................................................................................................102.5.2 Clearing Statistics....................................................................................................................................11

3 Ethernet Interface Configuration.............................................................................................123.1 Introduction to Ethernet Interfaces...................................................................................................................133.2 Ethernet Interface Features Supported by the AR200-S...................................................................................143.3 Configuring General Attributes of Ethernet Interfaces....................................................................................14

3.3.1 Establishing the Configuration Task.......................................................................................................143.3.2 (Optional) Configuring a Port Group......................................................................................................153.3.3 Configuring the Auto-Negotiation Mode................................................................................................163.3.4 Setting the Duplex Mode for an Ethernet Interface.................................................................................173.3.5 Setting the Rate for an Ethernet Interface................................................................................................183.3.6 Configuring the Outbound and Inbound Bandwidth Utilization of an Ethernet interface......................193.3.7 Configuring the Network Cable Type for an Ethernet Interface.............................................................193.3.8 Checking the Configuration.....................................................................................................................20

3.4 Configuring Layer 2 Ethernet Interface............................................................................................................213.4.1 Establishing the Configuration Task.......................................................................................................21

3.5 Configuring Port Isolation................................................................................................................................223.5.1 Configuring Flow Control.......................................................................................................................23

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3.5.2 Checking the Configuration.....................................................................................................................243.6 Maintaining an Ethernet Interface....................................................................................................................25

3.6.1 Configuring Loopback Detection............................................................................................................253.6.2 Configuring Cable Detection...................................................................................................................26

3.7 Configuration Examples...................................................................................................................................263.7.1 Example for Configuring the Auto-Negotiation Rate Range..................................................................263.7.2 Example for Configuring Port Isolation..................................................................................................28

4 ADSL Interface Configuration..................................................................................................314.1 ADSL Overview...............................................................................................................................................324.2 ADSL Features Supported by the AR200-S.....................................................................................................334.3 Setting Parameters for an ADSL Interface.......................................................................................................35

4.3.1 Establishing the Configuration Task.......................................................................................................354.3.2 Deactivating an ADSL Interface.............................................................................................................364.3.3 Setting Parameters for an ADSL Interface..............................................................................................374.3.4 Activating an ADSL Interface.................................................................................................................384.3.5 Checking the Configuration.....................................................................................................................39

4.4 Configuration Examples...................................................................................................................................404.4.1 Example for Configuring an ADSL Interface.........................................................................................40

5 Logical Interface Configuration................................................................................................445.1 Introduction to Logical Interfaces....................................................................................................................455.2 Features of the AR200-S Logical Interfaces....................................................................................................455.3 Configuring a Sub-interface.............................................................................................................................45

5.3.1 Configuring an Ethernet Sub-interface....................................................................................................465.3.1.1 Establishing the Configuration Task..............................................................................................465.3.1.2 Creating an Ethernet Sub-interface.................................................................................................465.3.1.3 Configuring an IP address for an Ethernet Sub-interface...............................................................475.3.1.4 Configuring the Traffic Statistics Function on an Ethernet Sub-interface.....................................475.3.1.5 Configuring an Ethernet Sub-interface for Dot1q VLAN Termination.........................................485.3.1.6 Checking the Configuration............................................................................................................49

5.3.2 Configuring an Eth-Trunk Sub-interface.................................................................................................495.3.2.1 Establishing the Configuration Task..............................................................................................495.3.2.2 Creating an Eth-Trunk Sub-interface..............................................................................................505.3.2.3 Configuring an IP address for an Eth-Trunk Sub-interface............................................................515.3.2.4 Configuring an Eth-Trunk Sub-interface for Dot1q VLAN Termination......................................515.3.2.5 Checking the Configuration............................................................................................................52

5.3.3 Configuring ATM Sub-interfaces............................................................................................................535.4 Configuring a Loopback Interface....................................................................................................................53

5.4.1 Establishing the Configuration Task.......................................................................................................535.4.2 Creating a Loopback Interface and Configuring Its IP Address..............................................................545.4.3 Checking the Configuration.....................................................................................................................54

5.5 Configuring a NULL Interface.........................................................................................................................555.5.1 Establishing the Configuration Task.......................................................................................................55



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5.5.2 Entering the Null Interface View.............................................................................................................555.5.3 Checking the Configuration.....................................................................................................................56

5.6 Configuring an MP Group Interface.................................................................................................................565.7 Configuring a Dialer Interface..........................................................................................................................585.8 Configuring Virtual-Ethernet Interfaces...........................................................................................................59

5.8.1 Establishing the Configuration Task.......................................................................................................595.8.2 Creating a VE Interface...........................................................................................................................595.8.3 Checking the Configuration.....................................................................................................................60

5.9 Configuring Virtual-Template Interfaces.........................................................................................................615.9.1 Establishing the Configuration Task.......................................................................................................615.9.2 Configuring the IP Address of a VT Interface.........................................................................................615.9.3 (Optional) Setting the Maximum Number of Links Supported by a VT Interface.................................625.9.4 Checking the Configuration.....................................................................................................................63



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1 Interface Overview

About This Chapter

This section describes common interface types and the interface numbering method.

1.1 Interface TypesInterfaces on the router are used to exchange data and interact with other network devices, andare classified into physical interfaces and logical interfaces.

1.2 Interface NumberingThis section describes the interface numbering scheme on the AR200-S.

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1.1 Interface TypesInterfaces on the router are used to exchange data and interact with other network devices, andare classified into physical interfaces and logical interfaces.

Physical InterfacesPhysical interfaces exist on boards.

Physical interfaces are classified into the following types:l LAN-side interface: is used by the router to exchange data with network devices on LANs.l WAN-side interface: is used by the router to exchange data with devices on external

networks.

Table 1-1 Physical interface types

Type Sub-type Description

LAN-sideinterface

Fast Ethernet (FE)interface

A LAN-side FE interface works at the data linklayer, provides a maximum of 100 Mbit/stransmission rate, processes Layer 2 protocolpackets, and implements Layer 2 forwarding.

WAN-sideinterface

FE interface A WAN-side FE interface works at the networklayer, can be assigned an IP address, provides amaximum of 100 Mbit/s transmission rate,processes Layer 3 protocol packets, and providesthe routing function.

Asymmetric DigitalSubscriber Line (ADSL)interface

An ADSL interface provides asymmetrictransmit and receive rates and implements fastdata transmission over copper twisted pairs byemploying high frequencies that are not used byregular telephone lines.NOTE

Only the AR207-S supports ADSL interfaces.

Logical InterfacesLogical interfaces are manually configured interfaces and can be used to exchange data but donot exist physically.



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Table 1-2 Logical interface types


LAN-sideinterface

LAN-side Eth-Trunkinterface

A LAN-side Eth-Trunk interface has Layer 2features and is formed by binding multiple Layer2 Ethernet interfaces to provide more bandwidthand higher transmission reliability.

WAN-sideinterface

Virtual templateinterface

A virtual template interface is used when PPPneeds to transmit packets of other link layerprotocols.

Virtual Ethernet interface A virtual Ethernet interface is used when theEthernet needs to transmit packets of other linklayer protocols.

MP group interface An MP group interface is dedicated to MPapplications, can be used to perform MP binding,and is usually used in scenarios requiringdynamic bandwidth.

Dialer interface A dialer interface implements the dialer controlcenter (DCC) function. A physical interface canbe bound to a dialer interface to inherit theconfiguration of the dialer interface.

WAN-side Eth-Trunkinterface

A WAN-side Eth-Trunk interface has Layer 3features and is formed by binding multiple Layer3 Ethernet interfaces to provide more bandwidthand higher transmission reliability.

Tunnel interface A tunnel interface has Layer 3 features, transmitspackets, and identifies and processes packetstransmitted over a tunnel.

VLANIF interface A VLANIF interface has Layer 3 features andenables VLANs to communicate after beingassigned an IP address.

Sub-interface A sub-interface is configured on a main interfaceto allow the local device to communicate withmultiple peer devices.

Multilink Frame Relay(MFR) interface

An MFR interface is formed by binding multiplephysical interfaces including channelized serialinterfaces to provide more bandwidth.

Loopback interface A loopback interface is always Up and can beconfigured with a 32-bit subnet mask.

Null interface A null interface is used to filter routes becauseany data packets received by the null interfaceare discarded.



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Bridge interface A bridge interface has Layer 3 features andenables users on different network segments ona transparent bridge to communicate after beingassigned an IP address.

1.2 Interface NumberingThis section describes the interface numbering scheme on the AR200-S.

On the AR200-S, interfaces are numbered in the format of slot ID/subcard ID/interface sequencenumber.

l Slot IDThe slot ID specifies the ID of the slot where a card resides.– When slots need to be combined into one slot, the greater slot ID is used as the new slot

ID. For example, when slot 1 and slot 2 are combined, slot ID 2 is used as the new slotID.

l Subcard IDThe subcard ID specifies the ID of a subcard. The cards of AR200-S series routers do notsupport subcards. Therefore, the subcard ID of the AR200-S is fixed as 0.

l Interface sequence numberThe interface sequence number indicates the number of each interface on a card.– There is only one row of interfaces on the interface card. These interfaces are numbered

from left to right starting with 0.

0 1 2 3

– There are two rows of interfaces on the interface card. These interfaces are numberedfrom bottom to top and left to right starting with 0.

1 3 5 7 9 11

0 2 4 6 8 10



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2 Interface Basic Configuration

About This Chapter

This chapter describes common interface types and how to view the interface information andconfigure the interval for collecting the interface traffic.

2.1 Basic Interface ConfigurationThis section describes the basic interface configuration of the AR200-S.

2.2 Basic Interface Configuration Supported by the AR200-SThis section describes the basic interface configurations supported by the AR200-S.

2.3 Configuring an Interface DescriptionThis section describes how to configure interface descriptions that help you to recognize thefunctions of the interfaces.

2.4 Configuring the Interval for Collecting Traffic Statistics on an InterfaceThis section describes how to configure the interval for collecting traffic statistics on allinterfaces or a specified interface. Traffic statistics help you to monitor network conditions.

2.5 Maintaining Interface Basic ConfigurationFor maintenance purposes, you need to monitor interface information and clear interfacestatistics to collect new statistics.

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2.1 Basic Interface ConfigurationThis section describes the basic interface configuration of the AR200-S.

To maintain many interfaces, you need to describe these interfaces. Interface descriptions recordthe use of interfaces and help rapidly identify interfaces.

To set the interval for collecting the statistics of traffic on the interface so that you can easilycollect the interface traffic and rate, you can configure the function of collecting the statistics oftraffic on the interface.

2.2 Basic Interface Configuration Supported by the AR200-S

This section describes the basic interface configurations supported by the AR200-S.

The AR200-S supports the configuration of interface description and interval for collecting thestatistics on interface traffic.

In the system view and interface view, you can configure the interval for collecting the statisticsof traffic on the interface. In this manner, you can flexibly collect the statistics of the traffic rateof all or partial interfaces.

2.3 Configuring an Interface DescriptionThis section describes how to configure interface descriptions that help you to recognize thefunctions of the interfaces.

Context

To maintain a large number of interfaces, you need to set interface descriptions to accuratelyand rapidly recognize the interfaces.

Procedure

Step 1 Run:system-view

The system view is displayed.

Step 2 Depending on the type of interface, adjust the command to enter the interface view.

Run the interface interface-type interface-number command to enter the interface view.

Step 3 Run:description interface-description

The description of the interface is configured.

----End



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Example

Run the display interface description command. If the description of the interface is displayed,it means that the configuration succeeds. For example:

<Huawei> display interface description ethernet 2/0/0PHY: Physical *down: administratively down ^down: standby (l): loopback (s): spoofing (b): BFD down (d): Dampening Suppressed Interface PHY Protocol Description Eth2/0/0 up up HUAWEI, AR Series, Ethernet2/0/0 Interface

2.4 Configuring the Interval for Collecting Traffic Statisticson an Interface

This section describes how to configure the interval for collecting traffic statistics on allinterfaces or a specified interface. Traffic statistics help you to monitor network conditions.

2.4.1 Establishing the Configuration TaskBefore configuring the interval for collecting traffic statistics on an interface, familiarize yourselfwith the applicable environment, pre-configuration tasks, and required data.

Applicable Environment

To easily collect the traffic volume and rate on interfaces, you can configure the interval forcollecting traffic statistics.

You can collect traffic statistics on all interfaces or a specified interface by configuring theinterval for collecting traffic statistics in the system view or interface view.

NOTE

l The interval set in the interface view takes effect on the current interface.

l The interval set in the system view takes effect on all the interfaces that use the default interval set inthe interface view.

Pre-configuration Tasks

Before configuring the interval for collecting the traffic statistics on an interface, complete thefollowing task:

l Powering on and starting the router

Data Preparation

To configure the interval for collecting the traffic statistics on an interface, you need thefollowing data.



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No. Data

1 Interface type and number

2 Interval for collecting the traffic statistics

2.4.2 Setting the Global Interval for Collecting Traffic StatisticsThe global interval for collecting traffic statistics takes effect on all the interfaces that use thedefault interval. This helps you configure the interval for collecting traffic statistics for multipleinterfaces at a time.

Context

Perform the following steps on the router to configure the global interval for collecting trafficstatistics.

Procedure



Step 2 Run:set flow-stat interval interval

The global interval for collecting traffic statistics is configured.

----End

2.4.3 Setting the Interval for Collecting Statistics of Traffic on anInterface

The procedure that follows sets the interval for collecting traffic statistics on a single interface.After the interval is configured, you can view the traffic volume and rate on the interface.

Context

Perform the following steps on the router to configure interval for collecting traffic statistics onan interface:

Procedure



Step 2 Run:interface interface-type interface-number



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The interface view is displayed.

Step 3 Run:set flow-stat interval interval

The interval for collecting traffic statistics on the interface is configured.

----End

2.4.4 Checking the ConfigurationAfter configuring the interval for collecting traffic statistics on an interface, you need to checkwhether the configuration is correct. In addition, you can view the traffic volume and rate onthe interface.

PrerequisiteThe interval for collecting traffic statistics on an interface or the global interval has beenconfigured.

Procedurel Run thel In the system view, run the display this command to check the global interval for collecting

traffic statistics.l Run the display interface [ interface-type [ interface-number ] | slot slot-id ] command to

check the interval for collecting traffic statistics on an interface.

----End

ExampleRun the display this command to view the global interval for collecting traffic statistics. Runthe display interface [ interface-type [ interface-number ] | slot slot-id ] command to view theglobal interval for collecting the traffic statistics. You can see that the interval for collectingtraffic statistics on all the interfaces that previously use the default interval changes to the globalinterval. If a non-default interval is configured on an interface, the interval remains unchanged.

[Huawei] display this# set flow-stat interval 100#return <Huawei> display interface ethernet 0/0/0Ethernet0/0/0 current state : UP Line protocol current state : UP Description:HUAWEI, AR Series, Ethernet0/0/0 Interface Switch Port, PVID : 1, TPID : 8100(Hex), The Maximum Frame Length is 1628 IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc01-0005 Last physical up time : 2011-01-27 14:26:10 Last physical down time : 2011-01-27 14:26:06 Current system time: 2011-01-27 14:38:18 Port Mode: COMMON COPPER Speed : 100, Loopback: NONE Duplex: FULL, Negotiation: ENABLE Mdi : AUTO Last 100 seconds input rate 104 bits/sec, 0 packets/sec Last 100 seconds output rate 584 bits/sec, 0 packets/sec Input peak rate 1104 bits/sec,Record time: 2011-01-28 16:25:35 Output peak rate 1832 bits/sec,Record time: 2011-01-28 16:26:03



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Input: 2671 packets, 1234002 bytes Unicast: 0, Multicast: 2671 Broadcast: 0, Jumbo: 0 Discard: 0, Total Error: 0 CRC: 0, Giants: 0 Jabbers: 0, Throttles: 0 Runts: 0, DropEvents: 0 Alignments: 0, Symbols: 0 Ignoreds: 0, Frames: 0 Output: 41054 packets, 5892638 bytes Unicast: 0, Multicast: 41054 Broadcast: 0, Jumbo: 0 Discard: 0, Total Error: 0 Collisions: 0, ExcessiveCollisions: 0 Late Collisions: 0, Deferreds: 0 Buffers Purged: 0 Input bandwidth utilization threshold : 100.00% Output bandwidth utilization threshold: 100.00% Input bandwidth utilization : 0% Output bandwidth utilization : 0.01%

2.5 Maintaining Interface Basic ConfigurationFor maintenance purposes, you need to monitor interface information and clear interfacestatistics to collect new statistics.

2.5.1 Monitoring Interface InformationMonitoring interface statistics helps you know the traffic volume and rate on interfaces, and thusanalyze network conditions.

Context

Running the display interface command, you can view the current status and description of theinterface and the statistics of the received and sent packets.

Procedurel Run the display interface [ interface-type [ interface-number ] | slot slot-id ] command to

check the current operating status of the interface and statistics collected on the interface.

l Run the display interface brief command in any view to check the brief information aboutall the interfaces on the device, including the physical status, protocol status, and bandwidthutilization of the interface.

l Run the display ip interface [ interface-type interface-number ] command in any view tocheck the IP configuration of the interface.

l Run one of the following commands in any view to check brief IP configuration of theinterface.

– display ip interface brief [ interface-type [ interface-number ] ]

----End



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2.5.2 Clearing StatisticsInterface traffic statistics provide the traffic volume and rate on an interface. To collect trafficstatistics generated in a period, clear the previous statistics.

Context

CAUTIONStatistics cannot be restored after you clear them. So, confirm the action before you use thecommand.

To clear the interface statistics collected using the NMS or the display interface command, runthe following commands in the user view to clear previous traffic statistics on the interface.

Procedurel Run the reset counters interface [ interface-type [ interface-number ] ] command in the

user view to clear the interface statistics collected using the display interface command.l Run the reset reset counters if-mib interface [ interface-type [ interface-number ] ]

command in the user view to clear the interface statistics collected using the NMS.

----End



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3 Ethernet Interface Configuration

About This Chapter

This chapter describes functions and configuration of Ethernet interfaces and providesconfiguration examples.

3.1 Introduction to Ethernet InterfacesEthernet is flexible, simple, and easy to implement, and therefore it becomes an important localarea network (LAN) networking technology.

3.2 Ethernet Interface Features Supported by the AR200-SThis section describes the ethernet interface features supported by the AR200-S.

3.3 Configuring General Attributes of Ethernet InterfacesThis section describes how to configure general attributes of Layer 2 and Layer 3 Ethernetinterfaces.

3.4 Configuring Layer 2 Ethernet InterfaceThis section describes the configurations supported only by Layer 2 Ethernet interfaces,including port isolation and traffic control.

3.5 Configuring Port IsolationPort isolation isolates interfaces in a VLAN.

3.6 Maintaining an Ethernet InterfaceEthernet interface maintenance tasks include loopback detection and cable detection.

3.7 Configuration ExamplesThis section provides examples for configuring auto-negotiation and port isolation.

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3.1 Introduction to Ethernet InterfacesEthernet is flexible, simple, and easy to implement, and therefore it becomes an important localarea network (LAN) networking technology.

The AR200-S provides two types of Ethernet interfaces:

l Layer 2 Ethernet interface (LAN-side Ethernet interface): works at the data link layer toprocess Layer 2 protocol packets.

l Layer 3 Ethernet interface (WAN-side Ethernet interface): works at the network layer toprocess Layer 3 protocol packets and provide routing capabilities. A Layer 3 Ethernetinterface can be assigned an IP address.

Layer 2 Ethernet interfaces on the AR200-S include fast Ethernet (FE) interfaces. Layer 2 FEinterfaces are electrical interfaces. Table 3-1 lists attributes of the Layer 2 Ethernet interfacessupported by the AR200-S.

Table 3-1 Attributes of Layer 2 Ethernet interfaces

InterfaceType

Rate (Mbit/s)

Auto-Negotiation Non-Auto Negotiation

FullDuplex

HalfDuplex

FullDuplex

HalfDuplex

Ethernetelectricalinterface

10 Yes Yes Yes Yes

100 Yes Yes Yes Yes

Layer 3 Ethernet interfaces on the AR200-S include fast Ethernet (FE) interfaces. Layer 3 FEinterfaces are electrical interfaces. Table 3-2 lists attributes of the Layer 3 Ethernet interfacessupported by the AR200-S.

NOTE

By default, Ethernet0/0/0 is a Layer 2 Ethernet interface. On the AR200-S, you can use the undo portswitchcommand to change the working mode of Ethernet0/0/0 from Layer 3 mode to Layer 2 mode.

Table 3-2 Attributes of Layer 3 Ethernet interfaces

InterfaceType

Rate (Mbit/s)

Auto-Negotiation Non-Auto Negotiation

FullDuplex

HalfDuplex

FullDuplex

HalfDuplex

Ethernetelectricalinterface

10 Yes Yes Yes Yes

100 Yes Yes Yes Yes



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NOTE

By default, an Ethernet interface works in auto-negotiation mode. The default mode is recommended. Ifauto-negotiation succeeds, interfaces on both ends work at the same duplex mode and rate.

3.2 Ethernet Interface Features Supported by the AR200-SThis section describes the ethernet interface features supported by the AR200-S.

NOTE

All Ethernet interfaces on the AR200-S are FE interfaces.

Port Group

The port group function of the AR200-S allows you to configure multiple interfaces in a portgroup at the same time. A command executed in the port group view applies to all the interfacesin the port group.

Auto-Negotiation

The auto-negotiation function allows interfaces on both ends of a link to select the same operatingparameters by exchanging information. In auto-negotiation mode, interfaces negotiate theiroperating parameters, including the duplex mode, rate, and flow control. If the negotiationsucceeds, the two interfaces use the same operating parameters.

Port Isolation

The simplest method of isolating interfaces on the AR200-S is to add different interfaces todifferent VLANs, but this wastes VLAN resources. The port isolation function allows you toadd interfaces to a port isolation group so that these interfaces can be isolated from each other.Therefore, this function helps implement secure and flexible networking schemes.

NOTE

Layer 2 Ethernet interfaces support port isolation.

3.3 Configuring General Attributes of Ethernet InterfacesThis section describes how to configure general attributes of Layer 2 and Layer 3 Ethernetinterfaces.

3.3.1 Establishing the Configuration TaskBefore configuring attributes for an Ethernet interface, familiarize yourself with the applicableenvironment, complete the pre-configuration tasks, and obtain the data required for theconfiguration. This will help you complete the configuration task quickly and accurately.


The configuration task is required in the following cases:



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l You can configure the description for an Ethernet interface to facilitate identification,maintenance, and configuration of the interface.

l By default, an Ethernet interface automatically identifies the network cable type. If theinterface cannot identify the cable type, set the cable type manually.

l You can configure the auto-negotiation mode, duplex mode, rate, and bandwidth utilizationparameters on an interface.

NOTE

All parameters in this section have default values, and these default values are recommended.

Pre-configuration TasksBefore configuring attributes for an Ethernet interface, complete the following task:

l Powering on the router and starting the router

Data PreparationTo configure attributes for an Ethernet interface, you need the following data.

No. Data

1 Number of an Ethernet interface

3.3.2 (Optional) Configuring a Port GroupBy configuring a port group, you can configure interfaces in batches.

ContextTo perform the same configurations on multiple interfaces, add these interfaces to a port group.In the port group view, you only need to run configuration commands one time, and theconfigurations apply to all the interfaces in the port group. This reduces the configurationworkload.

Procedurel Create a permanent port group

1. Run:system-view

The system view is displayed.2. Run:

port-group port-group-name

A permanent port group is created and the port group view is displayed.3. Run:

group-member { interface-type interface-number1 [ to interface-type interface-number2 ] } &<1-5>

An Ethernet interface is added to the permanent port group.l Create a temporary port group



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1. Run:system-view


port-group group-member { interface-type interface-number1 [ to interface-type interface-number2 ] } &<1-5>

A temporary port group is created and the port group view is displayed.

----End

Checking the Configuration

After a port group is configured, run the following commands to check the configuration.

Run the display port-group command to check the names of all created port groups.

<Huawei> display port-groupgroup1

Run the display port-group all command to check the configurations of all port groups.

<Huawei> display port-group allPortgroup: group1Ethernet0/0/0Ethernet0/0/1

3.3.3 Configuring the Auto-Negotiation ModeThe auto-negotiation function allows interfaces on both ends of a link to select the same operatingparameters by exchanging information.

Context

In auto-negotiation mode, interfaces negotiate their operating parameters, including the duplexmode, rate, and flow control. If the negotiation succeeds, the two interfaces use the sameoperating parameters. In non-auto negotiation mode, the operating parameters must be setmanually.

Procedure



Step 2 Run:interface { ethernet | gigabitethernet } interface-number

The Ethernet interface view is displayed.

Step 3 Run:negotiation auto

The Ethernet interface works in auto-negotiation mode.

By default, an Ethernet interface works in auto-negotiation mode.



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NOTE

Interfaces on both ends of a link must work in the same negotiation mode.

----End

3.3.4 Setting the Duplex Mode for an Ethernet InterfaceEthernet interfaces on both ends of a link must work in the same duplex mode.

ContextAn Ethernet interface works in either half duplex or full duplex mode:

l In half duplex mode, an Ethernet interface only receives or sends data at a time, and thetransmission distance is limited.

l In full duplex mode, an Ethernet interface can receive and send data at the same time, andthe maximum throughput is double that in half duplex mode. There is no limit on themaximum transmission distance.

You can set the duplex mode for an interface in either auto-negotiation or non-auto negotiationmode.

l In auto-negotiation mode, interfaces on both ends of a link negotiate their duplex mode. Ifthe negotiated duplex mode is not the required mode, you can set the duplex mode for thetwo interfaces. For example, two interfaces negotiate to work in half duplex mode, but theyare required to work in full duplex mode (they both support full duplex), run the autoduplex full command to set the full duplex mode for the two interfaces.

l In non-auto negotiation mode, you can set the required duplex mode for interfaces.

Procedurel Setting the duplex mode in auto-negotiation mode

1. Run:system-view


interface { ethernet | gigabitethernet } interface-number

The Ethernet interface view is displayed.3. Run:

auto duplex { full | half }*

The duplex mode is set for the Ethernet interface.

By default, the duplex mode of an Ethernet interface depends on the negotiationbetween this interface and the peer when auto-negotiation is enabled on the interface

l Setting the duplex mode in non-auto negotiation mode1. Run:

system-view





17


undo negotiation auto

The Ethernet interface works in non-auto negotiation mode.4. Run:

duplex { full | half }

The duplex mode is set for the Ethernet interface.

By default, an Ethernet interface in non-auto negotiation mode works in full duplexmode.

----End

3.3.5 Setting the Rate for an Ethernet InterfaceEthernet interfaces on both ends of a link must work at the same rate.

ContextIn auto-negotiation mode, interfaces on both ends of a link negotiate their rate. If the negotiatedrate is not the required rate, you can set the auto-negotiation rate range to limit the negotiatedrate. For example, if two interfaces negotiate to work at a rate of 10 Mbit/s, but they are requiredto work at a rate of 100 Mbit/s, you can run the auto speed 100 command to set the rate of theinterfaces to 100 Mbit/s.

In non-auto negotiation mode, you must set the rate for interfaces so that devices of the interfacescan communicate.

Procedurel Setting the rate in auto-negotiation mode

1. Run:system-view




auto speed { 10 | 100 }*

The auto-negotiation rate range is set for the Ethernet interface.

By default, Ethernet interfaces on both ends can negotiate to any rate supported bythem. The rate of an FE interface cannot be set to 1000 Mbit/s.

l Setting the rate in non-auto negotiation mode1. Run:

system-view




18



undo negotiation auto

The Ethernet interface works in non-auto negotiation mode.4. Run:

speed { 10 | 100 }

The rate is set for the Ethernet interface.

In non-auto negotiation mode, an Ethernet interface works at the maximum rate bydefault. The rate of an FE interface cannot be set to 1000 Mbit/s.

----End

3.3.6 Configuring the Outbound and Inbound BandwidthUtilization of an Ethernet interface

After the bandwidth usage is configured for the incoming and outgoing traffic on an Ethernetinterface, the system sends a trap to the NMS when the actual bandwidth usage exceeds theupper threshold. When the bandwidth usage falls below the upper threshold, the system sendsa clear alarm to the NMS.

Procedure



Step 2 Run:snmp-agent trap enable

The outbound and inbound bandwidth utilization alarm function is enabled on all Ethernetinterfaces.



Step 4 Run:trap-threshold { input-rate | output-rate } bandwidth-in-use [ resume-rate bandwidth-in-use ]

The threshold of the outbound or inbound bandwidth utilization is configured on the Ethernetinterface.

By default, the threshold of the outbound and inbound bandwidth utilization is 100%.

----End

3.3.7 Configuring the Network Cable Type for an Ethernet InterfaceYou can configure the network cable type for an Ethernet interface to ensure that the interfaceadapts to the actual network cable type.



19

Procedure





Step 3 Run:mdi { across | auto | normal }

The network cable type is set for the Ethernet interface.

NOTE

By default, an Ethernet interface automatically identifies the network cable type.

----End

3.3.8 Checking the ConfigurationAfter Ethernet interface attributes are configured, you can check the configuration of an Ethernetinterface.

PrerequisiteThe configurations of Ethernet interface parameters are complete.

Procedure

Step 1 Run the display interface [ interface-type [ interface-number ] ] command to check theconfiguration of an Ethernet interface.

----End

ExampleRun the display interface [ interface-type [ interface-number ] ] command, and you can checkwhether the configuration of the Ethernet interface is correct.

<Huawei> display interface ethernet 2/0/0Ethernet2/0/0 current state : UP Line protocol current state : UP Last line protocol up time : 2010-09-08 22:27:47 Description:HUAWEI, AR Series, Ethernet2/0/0 Interface Route Port,The Maximum Transmit Unit is 1500 Internet Address is 151.1.1.2/24 IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc01-0ae3 Last physical up time : 2010-09-08 22:27:47 Last physical down time : 2010-09-08 22:22:56 Current system time: 2010-09-09 14:34:29 Port Mode: COMMON COPPER Speed : 100, Loopback: NONE Duplex: FULL, Negotiation: ENABLE Mdi : AUTO Last 300 seconds input rate 19184 bits/sec, 36 packets/sec Last 300 seconds output rate 1640 bits/sec, 3 packets/sec



20

Input peak rate 0 bits/sec,Record time: - Output peak rate 0 bits/sec,Record time: - Input: 6771660 packets, 447253294 bytes Unicast: 0, Multicast: 0 Broadcast: 0, Jumbo: 0 Discard: 0, Total Error: 0 CRC: 0, Giants: 0 Jabbers: 0, Throttles: 0 Runts: 0, DropEvents: 0 Alignments: 0, Symbols: 0 Ignoreds: 0, Frames: 0 Output: 316239 packets, 20694268 bytes Unicast: 0, Multicast: 0 Broadcast: 1798, Jumbo: 0 Discard: 101164724933525, Total Error: 0 Collisions: 0, ExcessiveCollisions: 0 Late Collisions: 0, Deferreds: 0 Buffers Purged: 0 Input bandwidth utilization threshold : 100.00% Output bandwidth utilization threshold: 100.00% Input bandwidth utilization : 0% Output bandwidth utilization : 0%

3.4 Configuring Layer 2 Ethernet InterfaceThis section describes the configurations supported only by Layer 2 Ethernet interfaces,including port isolation and traffic control.

3.4.1 Establishing the Configuration TaskBefore setting parameters for a Layer 2 Ethernet interface, familiarize yourself with theapplicable environment, complete the pre-configuration tasks, and obtain the data required forthe configuration. This will help you complete the configuration task quickly and accurately.


The AR200-S provides two types of Ethernet interfaces: Layer 2 Ethernet interface and Layer3 Ethernet interface. A Layer 2 Ethernet interface works at the data link layer, processes Layer2 protocol packets, and implements Layer 2 forwarding.

NOTE

For details about other configurations on the Layer 2 Ethernet interface, see 3.3 Configuring General Attributesof Ethernet Interfaces.

The configuration task is required in the following situations:

l Port isolation can be configured to isolate interfaces in a VLAN.

l Traffic control can be configured to prevent packet loss caused by network congestion.


Before setting parameters for a Layer 2 Ethernet interface, complete the following tasks:



21

l Powering on and starting the router

Data PreparationTo set parameters for a Layer 2 Ethernet interface, you need the following data.

No. Data

1 Layer 2 Ethernet interface number

3.5 Configuring Port IsolationPort isolation isolates interfaces in a VLAN.

Applicable EnvironmentTable 3-3 shows the port isolation methods and application scenarios.

Table 3-3 Port isolation methods and application scenarios

PortIsolationMethod

Application Scenario

Configureunidirectionalisolationoninterfaces

l When multiple hosts connect to different interfaces of a router and a hostsends many broadcast packets to the other hosts, isolate the interfaceconnected to host from other interface unidirectionally. Then the other hostsdo not receive packets from the host.

l Interfaces in a port isolation group are isolated from each other, but interfacesin different port isolation groups can communicate. To isolate interfaces indifferent port isolation groups, configure unidirectional isolation betweenthese interfaces.

Configurea portisolationgroup

To implement Layer 2 isolation between interfaces, you can add differentinterfaces to different VLANs. This wastes VLAN resources. To save VLANresources, you can enable port isolation to isolate interfaces in a VLAN. Thatis, you can add interfaces to a port isolation group to implement Layer 2 isolationbetween these interfaces. Port isolation provides secure and flexible networkingschemes for customers.

Pre-configuration TasksBefore configuring port isolation, complete the following task:

l Creating a VLAN

Procedurel Configure unidirectional isolation on interfaces.



22

1. Run:system-viewThe system view is displayed.

2. Run:am isolate { interface-type interface-number } & <1-8>Unidirectional isolation is configured on the Ethernet interface.

NOTE

If interface A is isolated from interface B unidirectionally, packets sent from interface A cannotreach interface B, but packets sent from interface B can reach interface A.

l Configure a port isolation group.

1. Run:system-viewThe system view is displayed.

2. Run:interface { ethernet | gigabitethernet } interface-numberThe Ethernet interface view is displayed.

3. Run:port-isolate enable [ group group-id ]Port isolation is enabled on the Ethernet interface.

NOTE

Interfaces in a port isolation group are isolated from each other, but interfaces in different portisolation groups can communicate. If group-id is not specified, interfaces are added to portisolation group 1.

----End

Checking the ConfigurationRun the display this command in the interface view, and you can see that port isolation has beenconfigured successfully.

[Huawei-Ethernet0/0/0] display this#interface Ethernet0/0/0 port-isolate enable group 2#

3.5.1 Configuring Flow ControlFlow control prevents packet loss caused by network congestion.

ContextNetwork congestion causes packet loss. Flow control is a method of avoiding packet loss. Afterflow control is enabled on an interface, the interface sends a data frame to inform its remoteinterface when the received traffic rate reaches or exceeds its capacity. If the remote interfacealso supports flow control, it then sends data at a lower rate to prevent packet loss.

Procedure




23




Step 3 Run:flow-control

Flow control is enabled on the Ethernet interface.

By default, flow control is disabled on an Ethernet interface.

----End

3.5.2 Checking the ConfigurationAfter Ethernet interface attributes are configured, you can check the configuration.

PrerequisiteThe configurations of Ethernet interface parameters are complete.

Procedure

Step 1 Run the display interface [ interface-type [ interface-number ] ] command to check theconfiguration of an Ethernet interface.

----End

ExampleRun the display interface [ interface-type [ interface-number ] ] command to check theconfiguration of an Ethernet interface.

<Huawei> display interface ethernet 0/0/0Ethernet0/0/0 current state : UP Line protocol current state : UP Description:HUAWEI, AR Series, Ethernet0/0/0 Interface Switch Port, PVID : 1, TPID : 8100(Hex), The Maximum Frame Length is 1628 IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 0018-2000-0083 Last physical up time : 2010-07-21 15:35:37 Last physical down time : 2010-07-20 01:06:25 Current system time: 2010-07-21 16:07:53-05:13 Port Mode: COMMON COPPER Speed : 100, Loopback: NONE Duplex: FULL, Negotiation: ENABLE Mdi : AUTO Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Input peak rate 0 bits/sec,Record time: - Output peak rate 0 bits/sec,Record time: - Input: 126 packets, 34204 bytes Unicast: 0, Multicast: 52 Broadcast: 74, Jumbo: 0 Discard: 0, Total Error: 0 CRC: 0, Giants: 0 Jabbers: 0, Throttles: 0 Runts: 0, DropEvents: 0



24

Alignments: 0, Symbols: 0 Ignoreds: 0, Frames: 0 Output: 2398 packets, 799486 bytes Unicast: 0, Multicast: 1461 Broadcast: 1477, Jumbo: 0 Discard: 0, Total Error: 0 Collisions: 0, ExcessiveCollisions: 0 Late Collisions: 0, Deferreds: 0 Buffers Purged: 0 Input bandwidth utilization threshold : 100.00% Output bandwidth utilization threshold: 100.00% Input bandwidth utilization : 0% Output bandwidth utilization : 0%

3.6 Maintaining an Ethernet InterfaceEthernet interface maintenance tasks include loopback detection and cable detection.

3.6.1 Configuring Loopback DetectionBy configuring internal loopback, you can check whether the internal forwarding function ofthe AR200-S works.

Context

CAUTIONPerforming loopback detection affects system performance. After loopback detection isperformed, run the undo loopback command immediately to disable loopback detection.

Procedure





Step 3 Run:loopback internal

Internal loopback is configured on the interface.

Step 4 Run:display interface [ interface-type [ interface-number ] ]



25

The interface status is checked. If the current interface status is Up, the internal forwardingfunction works properly; otherwise, a fault occurs during internal forwarding.

----End

3.6.2 Configuring Cable DetectionBy configuring cable detection, you can locate faults on cables.

Procedure





Step 3 Run:virtual-cable-test

Cable detection is configured, and the detection result is displayed.

If the cable works properly, the total length of the cable is displayed.

If the cable is faulty, the distance from the interface to the fault point is displayed.

----End

3.7 Configuration ExamplesThis section provides examples for configuring auto-negotiation and port isolation.

3.7.1 Example for Configuring the Auto-Negotiation Rate RangeThis configuration example applies to the auto-negotiation mode. When data has multipleinbound interfaces but only one outbound interface, you can set the auto-negotiation rate rangefor the inbound interfaces to prevent congestion on the outbound interface.

Networking Requirements

As shown in Figure 3-1, PC1, PC2, and PC3 connect to Ethernet0/0/0, Ethernet0/0/1, andEthernet0/0/2 of RouterA and access the Internet by using an uplink.

PC1, PC2, and PC3 work at a rate of 100 Mbit/s, and Ethernet0/0/3 connecting RouterA and theInternet also works at a rate of 100 Mbit/s. If the auto-negotiation rate range is not specified, therate negotiated between the interfaces (Ethernet0/0/0, Ethernet0/0/1, and Ethernet0/0/2) and thePCs (PC1, PC2, and PC3) is 100 Mbit/s. This may cause congestion on outbound interfaceEthernet0/0/3.



26

Figure 3-1 Network diagram of auto-negotiation rate range configuration

PC1 PC2 PC3

Ethernet0/0/2Ethernet0/0/1

Ethernet0/0/0

IP Network

Ethernet0/0/3

RouterA

Router

Configuration Roadmap

In auto-negotiation mode, Ethernet interfaces on both ends of a link negotiate their rate. Thenegotiated rate may be any rate supported by Ethernet interfaces. By setting the auto-negotiationrate range, you can configure Ethernet interfaces to negotiate their rate within the specified range.

Data Preparation

To complete the configuration, you need the following data:

l Numbers of the interfaces connecting RouterA to PC1, PC2, and PC3

Procedure

Step 1 Configure the auto-negotiation mode.

# Configure auto-negotiation on Ethernet0/0/0.

<Huawei> system-view[Huawei] sysname RouterA[RouterA] interface ethernet 0/0/0[RouterA-Ethernet0/0/0] negotiation auto[RouterA-Ethernet0/0/0] quit


[RouterA] interface ethernet 0/0/1[RouterA-Ethernet0/0/1] negotiation auto[RouterA-Ethernet0/0/1] quit




27

[RouterA] interface ethernet 0/0/2[RouterA-Ethernet0/0/2] negotiation auto[RouterA-Ethernet0/0/2] quit

Step 2 Set the auto-negotiation rate.

# Set the auto-negotiation rate of Ethernet0/0/0 to 10 Mbit/s.

[RouterA] interface ethernet 0/0/0[RouterA-Ethernet0/0/0] auto speed 10[RouterA-Ethernet0/0/0] quit





----End

Configuration FilesConfiguration file of RouterA

# sysname RouterA#interface Ethernet0/0/0 auto speed 10#interface Ethernet0/0/1 auto speed 10#interface Ethernet0/0/2 auto speed 10#return

3.7.2 Example for Configuring Port IsolationPort isolation isolates interfaces in a VLAN.

Networking RequirementsAs shown in Figure 3-2, PC1, PC2, and PC3 belong to VLAN 10 and are connected toEthernet0/0/0, Ethernet0/0/1, and Ethernet0/0/2 on the Router.

The requirements are as follows: PC1 and PC2 cannot communicate with each other but theycan communicate with PC3.



28

Figure 3-2 Network diagram of port isolation

PC1 PC2 PC3

Ethernet0/0/2Ethernet0/0/1

Ethernet0/0/0

VLAN 10

Router

Configuration RoadmapAdd interfaces to a port isolation group to implement Layer 2 isolation between these interfaces.

Data PreparationTo complete the configuration, you need the following data:

l Number of the interface connecting the Router and PC1l Number of the interface connecting the Router and PC2l Port isolation mode on the Router(default configuration)l VLAN that PC1, PC2, and PC3 belong tol Port isolation group that the interfaces connected to PC1 and PC2 belong to

Procedure

Step 1 Configure port isolation.

# Configure port isolation on Ethernet0/0/0.

<Router> system-view[Router] interface ethernet 0/0/0[Router-Ethernet0/0/0] port-isolate enable[Router-Ethernet0/0/0] quit

# Configure port isolation on Ethernet0/0/1.

<Router> system-view[Router] interface ethernet 0/0/1[Router-Ethernet0/0/1] port-isolate enable[Router-Ethernet0/0/1] quit

Step 2 Verify the configuration.

PC1 and PC2 cannot ping each other.

PC1 and PC3 can ping each other.



29

PC2 and PC3 can ping each other.

----End

Configuration FilesThe following lists only the configuration file of the Router.

# sysname Router#interface Ethernet0/0/0 port link-type access port default vlan 10 port-isolate enable group 1#interface Ethernet0/0/1 port link-type access port default vlan 10 port-isolate enable group 1#interface Ethernet0/0/2 port link-type access port default vlan 10 #return



30

4 ADSL Interface Configuration

About This Chapter

The Asymmetric Digital Subscriber Line (ADSL) technology transmits LAN services over low-cost twisted pairs.

4.1 ADSL OverviewAsymmetric Digital Subscriber Line (ADSL) is a data communications technology that enablesfast data transmission over copper twisted pairs by employing high frequencies that are not usedby regular telephone lines.

4.2 ADSL Features Supported by the AR200-STo enable the AR200-S function as a CPE to transmit services on an ADSL line, deactivate anADSL interface on the AR200-S, set parameters for the interface, and then activate the interfaceto make configurations take effect.

4.3 Setting Parameters for an ADSL InterfaceAfter parameters are set for an ADSL interface on the AR200-S, the AR200-S can transmit dataupstream.

4.4 Configuration ExamplesThis section provides an example showing how to configure an ADSL interface.

Huawei AR200-S Series Enterprise RoutersConfiguration Guide - Interface Management 4 ADSL Interface Configuration


31

4.1 ADSL OverviewAsymmetric Digital Subscriber Line (ADSL) is a data communications technology that enablesfast data transmission over copper twisted pairs by employing high frequencies that are not usedby regular telephone lines.

Background

Depending on transmission media, network access modes include wired access, wireless access,and combination of wired and wireless access. Wired access includes twisted pair access, fiberaccess, and access by using both twisted pairs and fibers. Traditional copper twisted pairs arewidely used for access, so ADSL becomes the most competitive access mode.

ADSL uses the frequency division multiplexing (FDM) technology to classify telephone linesinto regular telephone lines, upstream channels, and downstream channels, avoidinginterference. ADSL can provide channelized data services (including E1/Tl, FR, IP, and ATMservices) and transmit data, voice, and video signals at a high rate.

ADSL Evolution

The first ADSL standards (G.992.1 G.DMT and G.992.2 G.Lite) supported the upstreamtransmission rate of 640 kbit/s to 2 Mbit/s, downstream transmission rate of 1 Mbit/s to 8 Mbit/s, and transmission distance of 3 to 5 km. Since the release of ADSL in June 1999, the ITU hasbeen improving the ADSL transmission performance, anti-attenuation and anti-interferencecapabilities, line diagnosis, and operation maintenance. In 2002, the ITU released ADSL2, whichcomprises two new ADSL standards (G.992.3 and G.992.4). In 2003, the ITU defined G.992.5,which is referred to as ADSL2+.

Compared with the first ADSL technology, ADSL2/2+ has the following advantages:

1. ADSL2 improves performance in long-distance transmission, anti-attenuation, and anti-noise. ADSL2 also improves the frame structure, so it can provide a maximum of 1 Mbit/s upstream transmission rate and 12 Mbit/s downstream transmission rate. Expanding thefrequency spectrum used, ADSL2+ greatly improves transmission performance andprovides a maximum rate of 1 Mbit/s upstream and 24 Mbit/s downstream.

2. In addition to providing higher rates, ADSL2/2+ improves transmission performance inlong-distance transmission and anti-interference by improving the modulation rate andcoding gain, reducing the frame overhead, and using enhanced signal processing methods.Currently, ADSL provides a transmission distance of 3 km, whereas ADSL2+ achieves amaximum of 6 km transmission distance.

3. ADSL2/2+ saves energy. The first ADSL technology provides the same transmission rateregardless of whether data is being transmitted. ADSL2/2+ enables a transmitter to enterthe sleep state when the data transmission rate is low or no data is being transmitted,reducing power consumption and heat dissipation.

ADSL System

As shown in Figure 4-1, an ADSL system consists of a Digital Subscriber Line AccessMultiplexer (DSLAM) and Customer Premises Equipment (CPE).

l A DSLAM is an aggregation device that terminates ADSL packets on the central office.



32

l A CPE provides interfaces for users, modulates and demodulates data signals, and uploadsuser data to a DSLAM.

NOTE

An AR200-S functions as a CPE.

In the ADSL system, downstream transmission refers to data transmission from a DSLAM to aCPE, and upstream transmission refers to data transmission from a CPE to a DSLAM. ADSLinterfaces on the AR200-S are upstream interfaces.

Figure 4-1 ADSL system

4.2 ADSL Features Supported by the AR200-STo enable the AR200-S function as a CPE to transmit services on an ADSL line, deactivate anADSL interface on the AR200-S, set parameters for the interface, and then activate the interfaceto make configurations take effect.

NOTE

Only the AR206, AR207, AR207V, and AR207V-P support ADSL interfaces.

Interface Activation

Activation of a G.SHDSL interface refers to the training between a DSLAM and a CPE. Duringthe training, the two devices check the line distance and status and negotiate parameters such asthe transmission standard, upstream and downstream line rates, and specified noise margin. Ifthe training succeeds, the G.SHDSL interface on the CPE is activated and can transmit data.

After an AR200-S starts, its G.SHDSL interface is automatically activated. The G.SHDSLinterface remains activated as long as its G.SHDSL line works properly. To set line parameters,deactivate the G.SHDSL interface on the CPE. After setting parameters, activate the interfaceto make configurations take effect.



33

Transmission StandardParameters for an ADSL interface include the transmission standard, bit exchange status,seamless rate adaptation status, and trellis coding status.

Transmission Standard

Table 4-1 lists the transmission standards supported by the AR200-S.

The AR200-S functions as a CPE and must be configured with the same transmission standardas the DSLAM. It is recommended that you configure the AR200-S to automatically adapt tothe transmission standard of the DSLAM.

Table 4-1 Transmission standards supported by the AR200-S

Transmission Standard Description

G.DMT (G992.1) Provides an upstream frequency band from25 kHz to 138 kHz, a downstream frequencyband from 138 kHz to 1.104 MHz, amaximum of 1 Mbit/s upstream transmissionrate, and a maximum of 8 Mbit/s downstreamtransmission rate.

ADSL2 (G992.3) Provides faster transmission rates byimproving the modulation rate, coding gain,and initialization state machine, reducing theframe overhead, and using enhanced signalprocessing methods. ADSL2 can provide amaximum of 1 Mbit/s upstream transmissionrate and 12 Mbit/s downstream transmissionrate.

AnnexL Reach extended ADSL2 (AnnexL for short)is defined in ADSL2 recommendation. It usesa narrower frequency band and optimizes thepower spectral density (PSD) mask to providelong-distance transmission.

ADSL2+ (G992.5) Expands the frequency band to 2.208 MHzand provides a maximum of 1 Mbit/supstream transmission rate and 24 Mbit/sdownstream transmission rate.

AnnexM Expands the upstream frequency band ofADSL2 or ADSL2+ and provides amaximum of 2 Mbit/s upstream transmissionrate.NOTENOTE

Only the AR207, AR207V, and AR207V-Psupport this parameter.

T1.413 Provides a maximum of 800 kbit/s upstreamtransmission rate and 8 Mbit/s downstreamtransmission rate.



34

NOTE

The performance of an ADSL interface depends on external factors, such as DSLAM line card types, DSLAMsoftware version, line noise, line length, and temperature.

Bit Exchange

During line activation, every sub-channel calculates the signal-to-noise ratio (SNR) and thenumber of bits to be transmitted. After the line is activated, the SNR may change because theexternal environment changes. For example, the SNRs of some sub-channels decrease, whereasthe SNRs of others increase. After a long period of time, the line may disconnect.

The bit exchange function addresses this issue in the following ways:l Allows sub-channels with low SNRs switch some bits that they cannot transmit to sub-

channels with higher SNRs.l Reduces the transmit power of sub-channels with higher SNRs to increase the sending rate

and SNRs of sub-channels with lower SNRs.These measures reduce the bit error rate without triggering line negotiation.

Seamless Rate Adaptation

To prevent the line disconnection when the external environment changes, the bit exchangefunction adjusts bit distribution or the power among sub-channels without deactivating the line.However, the bit exchange function cannot change the line rate. When the line environmentworse, the bit exchange function just allows the line to be activated at a smaller rate. When theline environment becomes better, the bit exchange function cannot adjust the rate and therefore,wasting line resources.

Seamless rate adaptation solves this problem by dynamically adjusting the line rate withoutreactivating the line.

Trellis Coding

Trellis coding increases the SNR by using an algorithm with a high coding efficiency. Aftertrellis coding is enabled, the line activation rate is significantly increased.

Service Supported by an ADSL InterfaceADSL interfaces support the ATM service. For detailed configuration of the ATM service, seeATM Configuration in WAN Interworking.

4.3 Setting Parameters for an ADSL InterfaceAfter parameters are set for an ADSL interface on the AR200-S, the AR200-S can transmit dataupstream.

4.3.1 Establishing the Configuration TaskBefore setting parameters for an ADSL interface, familiarize yourself with the applicableenvironment, complete the pre-configuration tasks, and obtain the data required for theconfiguration. This will help you complete the configuration task quickly and accurately.



35


Parameters for an ADSL interface include the transmission standard, bit exchange status,seamless rate adaptation status, and trellis coding status. The AR200-S must be configured withthe same transmission standard as the DSLAM; otherwise, the ADSL interface on the AR200-S cannot be activated. Bit exchange, seamless rate adaptation and trellis coding take effect onlywhen they are enabled on both the AR200-S and DSLAM.


Before setting parameters for an ADSL interface, complete the following task:

l Installing an ADSL-A/M or ADSL-B interface card on the AR200-S and ensuring that itis registered successfully

Data Preparation

To set parameters for an ADSL interface, you need the following data.

No. Data

1 ADSL interface number

2 ADSL interface transmission standard

3 Bit exchange status of the ADSL interface

4 Seamless rate adaptation status of the ADSL interface

5 Trellis coding status of the ADSL interface

4.3.2 Deactivating an ADSL InterfaceBefore setting parameters for an ADSL interface, deactivate the ADSL interface.

Prerequisite

None.

Context

Deactivating an ADSL interface disconnects it from a DSLAM. To enable the ADSL interfaceto transmit services, reactivate the interface.

NOTE

By default, an ADSL interface is activated.

Procedure




36


Step 2 Run:interface atm interface-number

The ADSL interface view is displayed.

Step 3 Run:shutdown

The ADSL interface is deactivated.

----End

4.3.3 Setting Parameters for an ADSL InterfaceTo improve ADSL transmission efficiency, set parameters for an ADSL interface on the AR200-S.

PrerequisiteThe ADSL interface has been deactivated.

ContextParameters for an ADSL interface include the transmission standard, bit exchange status,seamless rate adaptation status, and trellis coding status.

Procedure





Step 3 Run:adsl standard { adsl2 [ annexm ] | adsl2+ [ annexm ] | annexl | auto | gdmt | t1413 }

The transmission standard is configured for the ADSL interface.

By default, an ADSL interface transmission standard is auto. An ADSL interface must use thesame transmission standard as the remote ADSL interface on the DSLAM.

NOTE

The AnnexM standard is enabled on the AR200-S by default. You can use the AnnexM standard to activate theADSL interface on the AR200-S only when the AnnexM standard is also enabled on the DSLAM.

Step 4 Run:adsl bitswap { off | on }

Bit exchange is configured on the ADSL interface.



37

By default, bit exchange is enabled on an ADSL interface.

Step 5 Run:adsl sra { off | on }

Seamless rate adaptation is configured on the ADSL interface.

By default, seamless rate adaptation is disabled on an ADSL interface.

Step 6 Run:adsl trellis { off | on }

Trellis coding is configured on the ADSL interface.

By default, trellis coding is enabled on an ADSL interface.

----End

4.3.4 Activating an ADSL InterfaceTo make the parameters settings on an ADSL interface take effect, activate the ADSL interface.

Prerequisite

Parameters have been set for an ADSL interface.

Context

Activation of an ADSL interface refers to the training between a DSLAM and a CPE. Duringthe training, the two devices check the line distance and status and negotiate parameters such asthe transmission standard, upstream and downstream line rates, and specified noise margin. Ifthe training succeeds, the ADSL interface on the CPE is activated and can transmit data.

After an AR200-S starts, its ADSL interface is automatically activated. The ADSL interfaceremains activated as long as the ADSL line works properly. To set line parameters, deactivatethe ADSL interface on the CPE. After setting parameters, activate the interface to makeconfigurations take effect.

Procedure





Step 3 Run:undo shutdown

The ADSL interface is activated.

----End



38

4.3.5 Checking the ConfigurationAfter parameters are set for an ADSL interface, you can verify the configuration.

PrerequisiteAll the configurations of the ADSL interface are complete.

Procedurel Run the display dsl interface atm interface-number command to check the information

about an ADSL interface.l Run the display interface atm [ interface-number ] command to check the configuration

and status of an ADSL interface.

----End

ExampleRun the display dsl interface atm interface-number command on the AR200-S, you can checkthe training status, transmission standard, line status, performance statistics, bit exchange status,seamless rate adaptation status, trellis coding status, and board version of the ADSL interface.

<Huawei> display dsl interface atm 1/0/0 -------------------------------------------------------------- DSL driver and PHY status Training Status : Showtime Transmission mode : ADSL2 Line Status : No Defect Downstream max. attainable rate(Kbps): 28184 Upstream max. attainable rate(Kbps) : 2529 Downstream actual net data rate(Kbps): 24538 Upstream actual net data rate(Kbps) : 1021 Downstream SNR margin(dB) : 13.1 Upstream SNR margin(dB) : 18.9 Downstream attenuation(dB) : 0.0 Upstream attenuation(dB) : 4.8 Downstream output power(dB) : 7.2 Upstream output power(dB) : -8.3 Downstream total cells : 3305378 Upstream total cells : 74443 Downstream data cells : 36545 Upstream data cells : 5447 Downstream bit errors : 124 Upstream bit errors : 365 Total drop cells : 241 Downstream total ES count : 0 Upstream total ES count : 0 Downstream total SES count : 0 Upstream total SES count : 0 Downstream total UAS count : 72 Upstream total UAS count : 72 Total AS count : 36

Line modulations G.Dmt : Disabled ADSL2 : Disabled T1.413 : Disabled ADSL2+ : Enabled

Line capability



39

Bitswap : On SRA : Off Trellis coding : On Board version Board ID: : 963281TAN Software version : 4.06L.03 Bootloader (CFE) version : 1.0.37-106.24 DSL PHY and driver version : A2pD033a.d23c Build timestamp : 20110221_2122 --------------------------------------------------------------

Run the display interface atm [ interface-number ] command on the AR200-S. The status ofand performance statistics about the ADSL interface are displayed.

<Huawei> display interface atm 1/0/0

Atm1/0/0 current state : UP Line protocol current state : UP Last line protocol up time : 2011-7-27 14:57:48Description:HUAWEI, AR Series, Atm1/0/0 Interface Route Port,The Maximum Transmit Unit is 1488 Internet Address is 20.161.163.2/24 AAL enabled: AAL5, Maximum VCs: 32 VCs on main-interface: 1 (Total VCs: 1) VPs on main-interface: 0 (Total VPs: 0) Last physical up time : 2010-06-21 14:56:32 Last physical down time : 2010-06-21 14:56:31 Current system time: 2011-08-01 15:42:04 Port PHY type : ADSL The physical uptimes since the system startup : 2Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Input correct packet: 0 packets, Input total data: 0 bytes OAM Cells: 0, ASM Cells: 0 Packet Errors: 0, Cell Errors: 0 Output: 0 packets, 0 bytes OAM Cells: 0, ASM Cells: 0 Input bandwidth utilization : 0% Output bandwidth utilization : 0%

4.4 Configuration ExamplesThis section provides an example showing how to configure an ADSL interface.

4.4.1 Example for Configuring an ADSL InterfaceThe AR200-S transmits user services to a DSLAM over an ADSL line.

Networking RequirementsAs shown in Figure 4-2, multiple hosts in Enterprise A connect to the Interface through anenterprise gateway (Router).

Enterprise A requires a data access solution that is easy to deploy and provides high-speeddownstream transmission to meet requirements of data and video services. To meet these servicerequirements, the carrier provides an ADSL line for Enterprise A so that the Router can connectto the DSLAM by using an ADSL interface.



40

Figure 4-2 ADSL networking diagram

Router DSLAM

Enterprise A

ATM1/0/0Internet

Configuration RoadmapThe configuration roadmap is as follows:

1. Deactivate an ADSL interface.2. Set the same parameters on Router as those of the DSLAM.3. Activate the ADSL interface.

Data PreparationTo complete the configuration, you need the following data:l Transmission standard of the DSLAM: ADSL2+l Bit exchange status of the DSLAM: onl Seamless rate adaptation status of the DSLAM: offl Trellis coding status of the DSLAM: on

Procedure

Step 1 Deactivate ATM1/0/0.<Huawei> system-view[Huawei] sysname Router[Router] interface atm 1/0/0[Router-Atm1/0/0] shutdown

Step 2 Configure the transmission standard ADSL2+ for the ADSL interface.[Router-Atm1/0/0] adsl standard adsl2+

Step 3 Enable bit exchange on the ADSL interface.[Router-Atm1/0/0] adsl bitswap on

Step 4 Disable seamless rate adaptation on the ADSL interface.[Router-Atm1/0/0] adsl sra off

Step 5 Enable trellis coding on the ADSL interface.[Router-Atm1/0/0] adsl trellis on

Step 6 Activate ATM1/0/0.[Router-Atm1/0/0] undo shutdown

Step 7 Verify the configuration.# Check the training status, transmission standard, line status, performance statistics, bitexchange status, seamless rate adaptation status, trellis coding status, and board version of theADSL interface.



41

<Router> display dsl interface atm 1/0/0 -------------------------------------------------------------- DSL driver and PHY status Training Status : Showtime Transmission mode : ADSL2+ Line Status : No Defect Downstream max. attainable rate(Kbps): 28184 Upstream max. attainable rate(Kbps) : 2529 Downstream actual net data rate(Kbps): 24538 Upstream actual net data rate(Kbps) : 1021 Downstream SNR margin(dB) : 13.1 Upstream SNR margin(dB) : 18.9 Downstream attenuation(dB) : 0.0 Upstream attenuation(dB) : 4.8 Downstream output power(dB) : 7.2 Upstream output power(dB) : -8.3 Downstream total cells : 3305378 Upstream total cells : 74443 Downstream data cells : 36545 Upstream data cells : 5447 Downstream bit errors : 124 Upstream bit errors : 365 Total drop cells : 241 Downstream total ES count : 0 Upstream total ES count : 0 Downstream total SES count : 0 Upstream total SES count : 0 Downstream total UAS count : 72 Upstream total UAS count : 72 Total AS count : 36

Line modulations G.Dmt : Disabled ADSL2 : Disabled T1.413 : Disabled ADSL2+ : Enabled Line capability Bitswap : On SRA : Off Trellis coding : On Board version Board ID: : 963281TAN Software version : 4.06L.03 Bootloader (CFE) version : 1.0.37-106.24 DSL PHY and driver version : A2pD033a.d23c Build timestamp : 20110221_2122 --------------------------------------------------------------

# Check the status of and performance statistics about the ADSL interface.

<Router> display interface atm 1/0/0

Atm1/0/0 current state : UP Line protocol current state : UP Last line protocol up time : 2011-7-27 14:57:48Description:HUAWEI, AR Series, Atm1/0/0 Interface Route Port,The Maximum Transmit Unit is 1488 Internet Address is 20.161.163.2/24 AAL enabled: AAL5, Maximum VCs: 32 VCs on main-interface: 1 (Total VCs: 1) VPs on main-interface: 0 (Total VPs: 0) Last physical up time : 2010-06-21 14:56:32 Last physical down time : 2010-06-21 14:56:31 Current system time: 2011-08-01 15:42:04 Port PHY type : ADSL



42

Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Input correct packet: 0 packets, Input total data: 0 bytes OAM Cells: 0, ASM Cells: 0 Packet Errors: 0, Cell Errors: 0 Output: 0 packets, 0 bytes OAM Cells: 0, ASM Cells: 0 Input bandwidth utilization : 0% Output bandwidth utilization : 0%

----End

Configuration Filesl Configuration file of the Router

# sysname Router#interface Atm1/0/0 adsl standard adsl2+ #return



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5 Logical Interface Configuration

About This Chapter

The information provided here on interface types, configuration procedures, and configurationexamples can help you make full use of logical interfaces.

5.1 Introduction to Logical InterfacesLogical interfaces do not exist physically. They are manually configured for data exchange.

5.2 Features of the AR200-S Logical InterfacesThis section describes the applicable environment of logical interfaces.

5.3 Configuring a Sub-interfaceBy configuring sub-interfaces, you can enable the AR200-S to communicate with multiple peerdevices.

5.4 Configuring a Loopback InterfaceLoopback interfaces always remain in the Up state once created and execute the loopbackfunction.

5.5 Configuring a NULL InterfaceAll the packets sent to NULL interfaces are discarded.

5.6 Configuring an MP Group InterfaceA Multilink PPP (MP) group interface is used to perform MP binding to increase link bandwidth.

5.7 Configuring a Dialer InterfaceBy binding a physical interface to a dialer interface, you can enable the physical interface toinherit the configuration of the dialer interface.

5.8 Configuring Virtual-Ethernet InterfacesVirtual-Ethernet (VE) interfaces allow one data link protocol to transmit data of other link layerprotocols. This section describes the applicable environment and basic configurations of VEinterfaces.

5.9 Configuring Virtual-Template InterfacesVirtual-Template (VT) interfaces allow PPP links to transmit data of other link layer protocols.This section describes the applicable environment and basic configurations of VT interfaces.

Huawei AR200-S Series Enterprise RoutersConfiguration Guide - Interface Management 5 Logical Interface Configuration


44

5.1 Introduction to Logical InterfacesLogical interfaces do not exist physically. They are manually configured for data exchange.

Logical interfaces on the AR200-S include Eth-Trunk interfaces, VLANIF interfaces, sub-interfaces, loopback interfaces, null interfaces, MP group interfaces, dialer interfaces, tunnelinterfaces, virtual Ethernet interfaces, and virtual template interfaces.

5.2 Features of the AR200-S Logical InterfacesThis section describes the applicable environment of logical interfaces.

The AR200-S mainly supports the following types of logical interfaces:

l Eth-Trunk interface: includes Layer 2 and Layer 3 Eth-Trunk interfaces, which increasebandwidth and improves transmission reliability.

l VLANIF interface: has Layer 3 features and enables VLANs to communicate after beingassigned an IP address.

l Sub-interface: used to implement communication between a physical link and multipleremote ends.

l Loopback interface: used when the status of the interface needs to be always Up or theinterface needs to be configured with 32-bit subnet mask.

l Null interface: used in route filtering because any network packets sent to this interface arediscarded.

l MP group interface: used to perform MP binding. MP group interfaces are dedicated to theMP application and usually used in scenarios requiring dynamic bandwidth.

l Dialer interface: used to implement the Dialer Control Center (DCC) function. A physicalinterface can be bound to a dialer interface to inherit the configuration of the dialer interface.

l Tunnel interface: has Layer 3 features, transmits packets, and identifies and processespackets transmitted over a tunnel.

l Virtual-Template (VT) interface: used in the MP binding or when other data link layerprotocols need to be transmitted over a PPP link.

l Virtual-Ethernet (VE) interface: used when other data link layer protocols need to be carriedby the Ethernet protocol.

NOTE

l For the configurations of Eth-Trunk interfaces and VLANIF interfaces, see the Huawei AR200-S SeriesEnterprise Routers Configuration Guide - LAN.

l For the configurations of MP group interfaces, MFR interfaces, and dialer interfaces, see the Huawei AR200-S Series Enterprise Routers Configuration Guide - WAN.

l For the configuration of the tunnel interface, see the Huawei AR200-S Series Enterprise RoutersConfiguration Guide - VPN.

5.3 Configuring a Sub-interfaceBy configuring sub-interfaces, you can enable the AR200-S to communicate with multiple peerdevices.



45

5.3.1 Configuring an Ethernet Sub-interfaceIf a Layer 3 Ethernet interface needs to identify VLAN packets, configure sub-interfaces on theLayer 3 Ethernet interface. Then different VLAN packets can be forwarded from different sub-interfaces, providing great flexibility.

5.3.1.1 Establishing the Configuration TaskBefore configuring an Ethernet sub-interface, familiarize yourself with the applicableenvironment, complete the pre-configuration tasks, and obtain the required data. This will helpyou complete the configuration task quickly and accurately.

Applicable EnvironmentOn the AR200-S, sub-interfaces can be configured on Layer 3 Ethernet interfaces.

NOTE

l For the application of Ethernet sub-interfaces in VLANs, refer to VLAN Configuration.

Pre-configuration TasksBefore configuring an Ethernet sub-interface, complete the following tasks:

l Correctly connecting the physical interface of the sub-interfacel Configuring a Layer 3 main interface

Data PreparationTo configure an Ethernet sub-interface, you need the following data.

No. Data

1 Numbers of the main interface and sub-interfaces

2 IP Address of an Ethernet sub-interface

3 VLAN IDs associated with the sub-interface

4 (Optional) Thresholds of outbound and inbound bandwidth usage

5.3.1.2 Creating an Ethernet Sub-interfaceA sub-interface and a main interface are relatively independent. Sub-interfaces share theconfiguration parameters with physical interfaces, though those sub-interfaces have their ownconfiguration parameters on the link layer and the network layer.

Procedurel Creating a Layer 3 Ethernet Sub-interface

1. Run:system-view



46


interface { ethernet | gigabitethernet } interface-number.subinterface-number

The Ethernet sub-interface view is displayed.

The parameter subinterface-number specifies the number of the Ethernet sub-interface.

NOTE

A subinterface cannot be created on an Eth-Trunk member interface.

----End

5.3.1.3 Configuring an IP address for an Ethernet Sub-interfaceAssign IP addresses to Ethernet sub-interfaces to implement communication between networkdevices.

Procedure



Step 2 Run:interface { ethernet | gigabitethernet } interface-number.subinterface-number

The specified Ethernet sub-interface view is displayed.

Step 3 Run:ip address ip-address { mask | mask-length } [ sub ]

The IP address of the Ethernet sub-interface is configured.

For the configuration of an IP address, refer to the Huawei AR200-S Series Enterprise RoutersConfiguration Guide - IP Services.

NOTE

When two or more IP addresses are configured for an Ethernet interface, the keyword sub must be used toindicate the second IP address and the following IP addresses.

----End

5.3.1.4 Configuring the Traffic Statistics Function on an Ethernet Sub-interfaceAfter the traffic statistics function is enabled on an Ethernet sub-interface, you can collectstatistics about incoming and outgoing traffic on the sub-interface.

Procedure




47




Step 3 Run:statistic enable { inbound | outbound }

The traffic statistics function is enabled on the Ethernet sub-interface.

----End

5.3.1.5 Configuring an Ethernet Sub-interface for Dot1q VLAN TerminationConfiguring an Ethernet sub-interface for dot1q VLAN termination allows devices in differentVLANs to communicate.

ContextTo implement inter-VLAN communication, you can create Ethernet sub-interfaces on anEthernet interface and configure the sub-interfaces for dot1q VLAN termination to remove tagsfrom VLAN packets.

Procedure





Step 3 Run:control-vid vid dot1q-termination

The mappings between the control VLAN and the Ethernet sub-interface are specified.

Step 4 Run:dot1q termination vid vid

The allowed VLAN is configured on the Ethernet sub-interface for dot1q VLAN termination.

Step 5 Run:arp broadcast enable

The ARP broadcast function is enabled on the Ethernet sub-interface.

NOTE

When you enable or disable the ARP broadcast function on a sub-interface, the routing status of the sub-interfacebecomes Down and then Up. This may result in flapping of routes on the entire network, affecting the normaloperation of services.

----End



48

5.3.1.6 Checking the ConfigurationAfter configuring an Ethernet sub-interface, you can view the MTU, IP address, mask, andworking mode of the Ethernet sub-interface.

PrerequisiteThe configurations of an Ethernet sub-interface are complete.

Procedurel Run the display interface [ interface-type [ interface-number ] ] command to check the

status of the specified Ethernet interface.

----End

ExampleRun the display interface command. If the parameters of the Ethernet sub-interface, such as thephysical status, protocol status, MTU, IP address and mask, and interface mode, are displayed,the configuration succeeds. For example:

<Huawei> display interface ethernet 1/0/0.1Ethernet1/0/0.1 current state : UPLine protocol current state : UPDescription : HUAWEI, AR Series, Ethernet1/0/0.1 InterfaceRoute Port,The Maximum Transmit Unit is 1500Internet Address is 2.1.1.100/24IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-3177-e201Current system time: 2010-08-29 20:26:18 Last 300 seconds input rate 0 bytes/sec, 0 packets/sec Last 300 seconds output rate 0 bytes/sec, 0 packets/sec Realtime 81 seconds input rate 0 bits/sec, 0 packets/sec Realtime 81 seconds output rate 0 bits/sec, 0 packets/sec Input: 0 packets,0 bytes, 0 unicast,0 broadcast,0 multicast Output:1 packets,64 bytes, 0 unicast,1 broadcast,0 multicast Input bandwidth utilization : 0% Output bandwidth utilization : 0%

5.3.2 Configuring an Eth-Trunk Sub-interfaceLayer 3 Eth-Trunk interfaces on the AR200-S can be configured with sub-interfaces.

5.3.2.1 Establishing the Configuration TaskBefore configuring an Eth-Trunk sub-interface, familiarize yourself with the applicableenvironment, complete the pre-configuration tasks, and obtain the data required for theconfiguration. This will help you complete the configuration task quickly and accurately.

Applicable EnvironmentLayer 3 Eth-Trunk interfaces on the AR200-S can be configured with sub-interfaces.

Pre-configuration TasksBefore configuring an Eth-Trunk sub-interface, complete the following tasks:



49

l Creating an Eth-Trunk interfacel Using physical links to connect devices

Data Preparation

To configure an Eth-Trunk sub-interface, you need the following data.

No. Data

1 Number of the Eth-Trunk interface

2 Number of the Eth-Trunk sub-interface

3 VLAN ID associated with the sub-interface

5.3.2.2 Creating an Eth-Trunk Sub-interface

If a Layer 3 device uses an Eth-Trunk interface to connect to a Layer 2 device, a sub-interfaceneeds to be created on the Eth-Trunk interface to make the two devices communicate with eachother.

Procedure



Step 2 Run:interface eth-trunk trunk-id

A Layer 2 Eth-Trunk interface is created.

Step 3 Run:undo portswitch

The Layer 2 Eth-Trunk interface is switched to the Layer 3 mode.

By default, an Eth-Trunk interface works in Layer 2 mode.

Step 4 Run:quit

Return to the system view.

Step 5 Run:interface eth-trunk trunk-id.subnumber

A sub-interface is created for the Layer 3 Eth-Trunk interface.

subnumber specifies the number of the Eth-Trunk sub-interface. The number ranges from 1 to4096.

----End



50

5.3.2.3 Configuring an IP address for an Eth-Trunk Sub-interfaceIP addresses are assigned to Eth-Trunk sub-interfaces for communication between networkdevices.

Procedure



Step 2 Run:interface eth-trunk interface-number.subinterface-number

The Eth-Trunk sub-interface view is displayed.


An IP address is assigned to the Eth-Trunk sub-interface.

For details about IP address configuration, see the Huawei AR200-S Series Enterprise RoutersConfiguration Guide - IP Services.

NOTE

If two or more IP addresses are configured for an Eth-Trunk interface, the keyword sub must be used toindicate the second IP address and the following IP addresses.

----End

5.3.2.4 Configuring an Eth-Trunk Sub-interface for Dot1q VLAN TerminationWhen a Layer 3 device and a Layer 2 device are connected by an Eth-Trunk, and memberinterfaces of the Eth-Trunk are added to a specific VLAN, you can configure an Eth-Trunk sub-interface for dot1q VLAN termination on the Layer 3 device so that the two devices cancommunicate.

Procedure



Step 2 Run:interface eth-trunk interface-number.subinterface-number

The Eth-Trunk sub-interface view is displayed.

Step 3 Run:control-vid vid dot1q-termination

The mappings between the control VLAN and the Eth-Trunk sub-interface are specified.

Step 4 Run:dot1q termination vid vid



51

The allowed VLAN is configured on the Eth-Trunk sub-interface for dot1q VLAN termination.

Step 5 Run:arp broadcast enable

The ARP broadcast function is enabled on the Eth-Trunk sub-interface.

NOTE

When you enable or disable the ARP broadcast function on a sub-interface, the routing status of the sub-interfacebecomes Down and then Up. This may result in flapping of routes on the entire network, affecting the normaloperation of services.

----End

5.3.2.5 Checking the ConfigurationAfter configuring an Eth-Trunk sub-interface, you can view information about the sub-interface,including the IP address and MAC address.

PrerequisiteThe configurations of an Eth-Trunk sub-interface are complete.

Procedure

Step 1 Run the display interface eth-trunk [ trunk-id [ .subnumber ] ] command to check the statusof the Eth-Trunk sub-interface.

----End

ExampleRun the display interface eth-trunk command. If information about the Eth-Trunk sub-interface, including its IP address and MAC address, is displayed, it means that the configurationsucceeds. For example:

<Huawei> display interface eth-trunk 1.1Eth-Trunk1.1 current state : UPLine protocol current state : UPDescription : HUAWEI, AR Series, Eth-Trunk1.1 InterfaceRoute Port, Hash arithmetic : According to SIP-XOR-DIP, The Maximum Transmit Unit is 1500Internet Address is 10.10.10.100/24IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-3f60-ec00Current system time: 2010-08-25 00:28:20 Last 300 seconds input rate 0 bytes/sec, 0 packets/sec Last 300 seconds output rate 0 bytes/sec, 0 packets/sec Realtime 77 seconds input rate 0 bits/sec, 0 packets/sec Realtime 77 seconds output rate 0 bits/sec, 0 packets/sec Input: 0 packets,0 bytes, Output:0 packets,0 bytes, Input bandwidth utilization : 0% Output bandwidth utilization : 0%-----------------------------------------------------PortName Status Weight-----------------------------------------------------Ethernet1/0/0 UP 1-----------------------------------------------------The Number of Ports in Trunk : 1The Number of UP Ports in Trunk : 1



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5.3.3 Configuring ATM Sub-interfacesConfiguring ATM sub-interfaces implements P2MP connections on ATM links.

Procedure



Step 2 Run:interface atm interface-number.subnumber [ p2mp | p2p ]

An ATM sub-interface is configured.

subnumber specifies the number of the ATM Sub-interface. The number ranges from 1 to 1024

The default type of an ATM sub-interface is P2MP.

For details about ATM sub-interface configuration, refer to ATM Configuration in the HuaweiAR200-S Series Enterprise Routers Configuration Guide - WAN Access.

----End

5.4 Configuring a Loopback InterfaceLoopback interfaces always remain in the Up state once created and execute the loopbackfunction.

5.4.1 Establishing the Configuration TaskBefore configuring a loopback interface, learn the applicable environment, pre-configurationtasks, and data required for configuration.


As the loopback interface always remains in the Up state once created and executes the loopbackfunction, it can be used to improve connection reliability.

Loopback interfaces have the following functions:

l The IP address of a loopback interface can be designated as the source address of packets.l The IP address of a loopback interface can be used to control the access interface and filter

logs.l If more than one link can reach the same neighbor, a loopback interface can be used as the

BGP neighbor of the local router. This avoids neighbor relationship failures caused byinterface faults when other types of interfaces are used as BGP neighbors.


Before configuring a Loopback interface, power on the router and start the router.



53

Data Preparation

To configure a loopback interface, you need the following data.

No. Data

1 Number of the loopback interface

2 IP address of the loopback interface

5.4.2 Creating a Loopback Interface and Configuring Its IP AddressAfter a loopback interface is assigned an IP address, the local device can use this interface tocommunicate with other devices.

Procedure



Step 2 Run:interface loopback loopback-number

A loopback interface is created and the loopback interface view is displayed.

You can create or delete loopback interface dynamically. After a loopback interface is created,the link-layer protocol is always up unless the loopback interface is deleted.

Step 3 Run:ip address ip-address [ mask | mask-length ] [ sub ]

The IP address of the loopback interface is configured.

----End

5.4.3 Checking the ConfigurationAfter configuring loopback interfaces, you can verify the configuration and view the statisticsabout loopback interfaces.

PrerequisiteThe configurations of a loopback interface are complete.

Procedure

Step 1 Run the display interface loopback [ loopback-number ] command to check the status of aloopback interface.

----End



54

ExampleRun the display interface loopback command. The following information shows that the linklayer protocol status of the interface is Up.

<Huawei> display interface loopback 6LoopBack6 current state : UPLine protocol current state :UP (spoofing)Description:HUAWEI, AR Series, LoopBack6 InterfaceRoute Port,The Maximum Transmit Unit is 1500Internet Address is 10.10.1.1/24Physical is LoopbackCurrent system time: 2010-09-10 10:03:18Statistics last cleared: 2008-08-02 15:32:27 Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Realtime 6 seconds input rate 0 bits/sec, 0 packets/sec Realtime 6 seconds output rate 0 bits/sec, 0 packets/sec Input: 0 bytes Output:0 bytes Input bandwidth utilization : 0% Output bandwidth utilization : 0%

5.5 Configuring a NULL InterfaceAll the packets sent to NULL interfaces are discarded.

5.5.1 Establishing the Configuration TaskThis section describes the applicable environment, pre-configuration tasks, and data preparationfor configuring null interfaces.

Applicable EnvironmentA Null interface is like the null devices supported by some operating systems. All packets sentto a Null interface are dropped. The system automatically creates a Null interface NULL0.

Since all packets sent to a Null interface are dropped, you can specify a Null interface as theoutbound interface for packets to be filtered out. In this case, you do not need to configure anACL.

For example, using the following command discards all packets sent to the 192.101.0.0 networksegment.

[Huawei] ip route-static 192.101.0.0 255.255.0.0 NULL 0

Pre-configuration TasksBefore configuring a Null interface, power on the router and start the router.

Data PreparationNone.

5.5.2 Entering the Null Interface ViewThe system automatically creates a Null interface NULL0.



55

Procedure



Step 2 Run:interface NULL 0

The NULL interface view is displayed.

The NULL interface stays in the Up state. It cannot forward data packets. You cannot configurean IP address for it or encapsulate it with protocols.

----End

5.5.3 Checking the ConfigurationAfter configuring null interfaces, you can verify the configuration is correct and view statisticsabout null interfaces.

PrerequisiteThe configurations of a null interface are complete.

Procedure

Step 1 Run the display interface null [ 0 ] command to check the status of a null interface.

----End

Example

Run the display interface null command. The following information shows that the status ofthe null interface is Up.

<Huawei> display interface null 0NULL0 current state : UPLine protocol current state :UP (spoofing)Description:HUAWEI, AR Series, NULL0 InterfaceRoute Port,The Maximum Transmit Unit is 1500Internet protocol processing : disabledPhysical is NULL DEVCurrent system time: 2010-09-10 10:03:18 Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Realtime 0 seconds input rate 0 bits/sec, 0 packets/sec Realtime 0 seconds output rate 0 bits/sec, 0 packets/sec Input: 0 bytes Output:0 bytes Input bandwidth utilization : 0% Output bandwidth utilization : 0%

5.6 Configuring an MP Group InterfaceA Multilink PPP (MP) group interface is used to perform MP binding to increase link bandwidth.



56


Multiple PPP links can be bound to an MP group to increase link bandwidth. This is called MPbinding. MP fragments the packets whose length is greater than the minimum packet length andsends the fragments to the peer device over multiple PPP links in the MP group. After receivingthese fragments, the peer device assembles these fragments and sends assembled packets to thenetwork layer. An MP group interface is dedicated to the MP application and used in scenariosrequiring dynamic bandwidth.


Before configuring an MP Group interface, power on the router and start the router.

Procedure



Step 2 Run:interface mp-group number

An MP group interface is created.


An IP address is assigned to the MP group interface.

----End

Checking the Configuration

After an MP group interface is configured, run the following command to check theconfiguration.

Run the display interface mp-group command to check the status of the MP group interface.

<Huawei> display interface mp-group 0/0/1Mp-group0/0/1 current state : UP Line protocol current state : UP Description:HUAWEI, AR Series, Mp-group0/0/1 Interface Route Port,The Maximum Transmit Unit is 1500 Internet Address is 100.1.1.1/24 Link layer protocol is PPP LCP initial Physical is MP, baudrate is 0 bps Current system time: 2010-08-27 18:45:29 Last 300 seconds input rate 0 bytes/sec, 0 packets/sec Last 300 seconds output rate 0 bytes/sec, 0 packets/sec Realtime 0 seconds input rate 0 bytes/sec, 0 packets/sec Realtime 0 seconds output rate 0 bytes/sec, 0 packets/sec 0 packets input, 0 bytes, 0 drops 0 packets output, 0 bytes, 0 drops Input bandwidth utilization : 0% Output bandwidth utilization : 0%



57

5.7 Configuring a Dialer InterfaceBy binding a physical interface to a dialer interface, you can enable the physical interface toinherit the configuration of the dialer interface.

Applicable EnvironmentDial Control Center (DCC) allows a router to communicate by using the Integrated ServiceDigital Network (ISDN) or Public Switched Telephone Network (PSTN). DCC provides on-demand dialup services. A dialer interface is a logical interface used to implement DCC. Aphysical interface can be bound to a dialer interface to inherit the configuration of the dialerinterface.

Pre-configuration TasksBefore configuring a Dialer interface, power on the router and start the router.

Procedure



Step 2 Run:interface dialer number

A dialer interface is created.


An IP address is assigned to the dialer interface.

----End

Checking the ConfigurationRun the display interface dialer command to check the status of the dialer interface.

<Huawei> display interface dialer 10Dialer10 current state : UP Line protocol current state : UP (spoofing) Description:HUAWEI, AR Series, Dialer10 Interface Route Port,The Maximum Transmit Unit is 1500, Hold timer is 10(sec) Internet Address is 20.1.1.5/24 Link layer protocol is PPP LCP initial Physical is Dialer Current system time: 2007-08-28 11:27:09 Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Realtime 0 seconds input rate 0 bits/sec, 0 packets/sec Realtime 0 seconds output rate 0 bits/sec, 0 packets/sec Input: 0 bytes, Output:0 bytes, Input bandwidth utilization : 0% Output bandwidth utilization : 0%



58

5.8 Configuring Virtual-Ethernet InterfacesVirtual-Ethernet (VE) interfaces allow one data link protocol to transmit data of other link layerprotocols. This section describes the applicable environment and basic configurations of VEinterfaces.

5.8.1 Establishing the Configuration TaskThis section describes the applicable environment, pre-configuration tasks, and required datafor configuring VE interfaces.

Applicable EnvironmentVirtual-Ethernet (VE) interfaces are used in PPPoEoA and IPoEoA. VE interfaces can also beused to configure the firewall and routes.

Configuration of the VE interface is like that of the Ethernet interface. For details, refer to thechapter LAN-Side Ethernet Interface Configuration.

VE interfaces support the following features:

l Routing protocolsl VLAN configuration

Pre-configuration TasksBefore configuring a VE interface, power on the router and start the router.

Data PreparationTo configure a VE interface, you need the following data.

No. Data

1 Number of the VE interface

5.8.2 Creating a VE InterfaceBefore creating a VE interface, ensure that the physical board in the specified slot exists.

ProcedureStep 1 Run:

system-view


Step 2 Run:interface virtual-ethernet ve-number

A VE interface is created and the VE interface view is displayed.



59

The parameter ve-number specifies the number of a VE interface, including slot/card/serialformat, the serial number ranges from 0 to 127.

NOTE

After establishing a binding relationship between a VE interface and the permanent virtual channel (PVC)that transmits PPPoEoA or IPoEoA data, you can delete this VE interface only when you unbind the VEinterface from the PVC.

NOTE

----End

5.8.3 Checking the ConfigurationAfter VE interfaces are configured, you need to check whether the configuration is correct. Inaddition, you can view the statistics about VE interfaces.

PrerequisiteThe configurations of Virtual-Ethernet interfaces are complete.

Procedure

Step 1 Run the display interface virtual-ethernet [ ve-number ] command to check the status of a VEinterface.

----End

Example

Run the display interface virtual-ethernet command. If the configuration and status of thespecified VE interface are displayed, it means that the configuration succeeds. For example:

<Huawei> display interface Virtual-EthernetVirtual-Ethernet0/0/0 current state : DOWNLine protocol current state : DOWNDescription:HUAWEI, AR Series, Virtual-Ethernet0/0/0 InterfaceRoute Port,The Maximum Transmit Unit is 1500Internet protocol processing : disabledIP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc99-9999Current system time: 2010-09-10 10:03:18 Input bandwidth utilization : 0% Output bandwidth utilization : 0%Virtual-Ethernet0/0/1 current state : UPLine protocol current state : UPLast line protocol up time: 2007-11-03, 17:24:24Description:HUAWEI, AR Series, Virtual-Ethernet0/0/1 InterfaceRoute Port,The Maximum Transmit Unit is 1500Internet Address is 200.1.1.2/24IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc99-9999Carrier Layer: 1 PVC total, 1 map up, 0 map downCurrent system time: 2010-09-10 10:03:18 Input bandwidth utilization : 0% Output bandwidth utilization : 0% Last 300 seconds output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 drops 5 packets output, 300 bytes, 0 drops



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5.9 Configuring Virtual-Template InterfacesVirtual-Template (VT) interfaces allow PPP links to transmit data of other link layer protocols.This section describes the applicable environment and basic configurations of VT interfaces.

5.9.1 Establishing the Configuration TaskWhen a PPP link needs to transmit data of other link layer protocols, configure a Virtual-Template (VT) interface.

Applicable EnvironmentA VT interface is used in VPN, MP and ATM applications. The system creates and deletes VAinterfaces and the process is transparent to users.

The link layer of VT interfaces only supports the PPP protocol, and the network layer onlysupports IP.

CAUTIONl The newly configured or modified parameters of a VT interface take effect only after the

shutdown and the undo shutdown command are run.l After configuring or modifying services such as MPLS, MTU or IS-IS, modify VT

configuration on the interfaces with the services configured.

Pre-configuration TasksBefore configuring a VT interface, complete the following tasks:

l Installing and powering on the router properlyl Configuring the physical interface

Data PreparationTo configure a VT interface, you need the following data.

No. Data

1 Number of the VT interface, IP address of the VT interface

2 (Optional) Maximum number of links that send multicast or broadcast packetssupported by the VT interface

5.9.2 Configuring the IP Address of a VT InterfaceWhen VT interfaces are used to communicate with other devices, you need to configure IPaddresses for the VT interfaces.



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Procedure



Step 2 Run:interface virtual-template vt-number

A VT interface is created, and the VT interface view is displayed.

vt-number specifies the number of the VT interface. The value ranges from 0 to 1023.

After a VT interface is deleted, all of its derived VA interfaces are deleted automatically.

Step 3 Run:ip address ip-address { mask| mask-length } [ sub ]

The IP address of the VT interface is configured.

----End

5.9.3 (Optional) Setting the Maximum Number of Links Supportedby a VT Interface

When a VT interface has a large number of links, system performance is affected if multicastor broadcast packets are sent through every link. After the maximum number of links supportedby a VT interface is configured, when the number of links exceeds the upper limit, multicast orbroadcast packets are discarded, which ensures that the system runs normally.

Procedure



Step 2 Run:interface virtual-template vt-number

A VT interface is created and the VT interface view is displayed.

Step 3 Run:broadcast-limit link number

The maximum number of links supported by the VT interface for sending multicast or broadcastpackets is configured.

Multicast or broadcast packets sent out from each link may affect system performance if thereare too many links in the VT interface.

Using the broadcast-limit link command, you can restrict the packets since the packets aredropped when the link number exceeds the maximum number.

NOTE

Do not configure multiple services such as MP, L2TP and PPPoE on a VT.



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By default, the maximum link number is 30 for the VT interface.

----End

5.9.4 Checking the ConfigurationAfter VT interfaces are configured, you can verify the configuration and view the statistics aboutVT interfaces.

PrerequisiteThe configurations of VT interfaces are complete.

Procedurel Run the display interface virtual-template [ vt-number ] command to check the status of

a VT interface.

l Run the display virtual-access [ vt vt-number | dialer dialer-interface-number | user user-name | peer peer-address | va-number ] * command to check the status of a VA interface.

----End

Example

Run the display interface virtual-template command. If the configuration of a VT interface isdisplayed, the configuration succeeds.

<Huawei> display interface Virtual-Template 0Virtual-Template0 current state : UPLine protocol current state :UP (spoofing)Description:HUAWEI, AR Series, Virtual-Template0 InterfaceRoute Port,The Maximum Transmit Unit is 1500Internet Address is 10.1.1.1/24Link layer protocol is PPPLCP initial, MP openedPhysical is None, baudrate is 64000 bpsCurrent system time: 2010-09-10 10:03:18 Last 300 seconds input rate 0 bits/sec, 0 packets/sec Last 300 seconds output rate 0 bits/sec, 0 packets/sec Realtime 0 seconds input rate 0 bits/sec, 0 packets/sec Realtime 0 seconds output rate 0 bits/sec, 0 packets/sec Input: 0 bytes Output:0 bytes Input bandwidth utilization : 0% Output bandwidth utilization : 0%

Run the display virtual-access command. If the status of a VA interface is displayed, theconfiguration succeeds. For example:

<Huawei> display virtual-accessVirtual-Template1:0 current state : UPLine protocol current state : UPLast line protocol up time : 2011-10-12 14:14:32Description:HUAWEI, AR Series, Virtual-Template1:0 InterfaceRoute Port,The Maximum Transmit Unit is 1480Link layer protocol is PPPLCP opened, IPCP openedCurrent system time: 2011-10-12 14:20:22 Input bandwidth utilization : 0% Output bandwidth utilization : 0%



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Configuration Guide - Interface Management(V200R002C00_01)

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Transcript of Configuration Guide - Interface Management(V200R002C00_01)