NE80E V300R003 Product Description

8/12/2019 NE80E V300R003 Product Description

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Product Description

Quidway NetEngine80E Core RouterV300R003

Issue 01

Date 2007-09-10


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Issue 01 (2007-09-10) Commercial in Confidence Page 3 of 154

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service.

Please feel free to contact our local office or company headquarters.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Copyright Huawei Technologies Co., Ltd. 2007. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without priorwritten consent of Huawei Technologies Co., Ltd.

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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 respectiveholders.

Notice

The information in this document is subject to change without notice. Every effort has been made in the

preparation 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.
http://www.huawei.com/mailto:[email protected]:[email protected]://www.huawei.com/


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Quidway NetEngine80E Core Router V300R003

Product Description


About This Document

Author

Prepared by Du fang Date 2007-07-24

Reviewed by Tian xiao dong, Geng aiju, Lu

guang, Wang xiaotang, Li xue

Date 2007-08-10

Approved by Wen zhixiang Date 2007-09-10

Summary

This document describes the product features, hardware architecture, link features,software features, operation and maintenance, network management, networking

applications, and technical specifications of the Quidway NetEngine80E core router.This document includes:

Chapter Details

1 Product Features This chapter introduces the product positioningand features of the NE80E.

2 System Architecture This chapter describes the physical, logical, andsoftware architecture of the NE80E.

3 Hardware Architecture This chapter describes the chassis, fans, powermodules, and board types of the NE80E.

4 Link Features This chapter describes the link features of theNE80E.

5 Primary Service Features This chapter describes the service features of theNE80E.

6 Maintenance and NetworkManagement System

This chapter describes operation andmaintenance, and network management of theNE80E.

7 Networking Applications This chapter describes the networking applicationsof the NE80E.


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Chapter Details

8 Technical Specifications This chapter describes the technical specificationsof the NE80E.


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History

Issue Details Date Author Approved by

01 Creation 2007-09-10 Du fang Wen zhixiang


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Contents

1 Product Features.......................................................................................................... 131.1 Positioning ................................................................................................................................ 131.2 Abundant Services .................................................................................................................... 131.3 High-Density LPUs .................................................................................................................... 131.4 Powerful Forwarding Capacity................................................................................................... 141.5 Perfect QoS Mechanism............................................................................................................ 151.6 Excellent Security Design.......................................................................................................... 151.7 Good IPv4 and IPv6 Compatibility.............................................................................................. 161.8 Compatibility and Expansion Capacity ....................................................................................... 161.9 High Reliability .......................................................................................................................... 16

2 System Architecture .................................................................................................... 202.1 Physical System Architecture..................................................................................................... 202.2 Logical System Architecture....................................................................................................... 212.3 Software Architecture ................................................................................................................ 222.4 VRPv5 Architecture ................................................................................................................... 23

3 Hardware Architecture................................................................................................. 253.1 Chassis ..................................................................................................................................... 253.2 Fans.......................................................................................................................................... 27

3.2.1 Fan Module....................................................................................................................... 273.2.2 Ventilation and Heat Dissipation System............................................................................ 27

3.3 Power Modules ......................................................................................................................... 273.3.1 DC-Input Power Supply..................................................................................................... 283.3.2 AC-Input Power Supply ..................................................................................................... 28

3.4 LCD .......................................................................................................................................... 293.4.1 Introduction....................................................................................................................... 293.4.2 Appearance ...................................................................................................................... 29

3.5 Board Cage............................................................................................................................... 303.5.1 Board Cage ...................................................................................................................... 303.5.2 Board Distribution in the Board Cage ................................................................................ 31

3.6 Boards ...................................................................................................................................... 313.6.1 MPU................................................................................................................................. 313.6.2 SFU.................................................................................................................................. 32


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3.6.3 LPU.................................................................................................................................. 323.6.4 Service Boards ................................................................................................................. 37

4 Link Features................................................................................................................ 384.1 Ethernet Link Features .............................................................................................................. 38

4.1.1 Basic Features.................................................................................................................. 384.1.2 Ethernet Bundling ............................................................................................................. 384.1.3 Virtual Ethernet Interfaces................................................................................................. 39

4.2 FR Link Features....................................................................................................................... 394.3 POS Link Features.................................................................................................................... 40

4.3.1 SDH/SONET..................................................................................................................... 404.3.2 POS Interface................................................................................................................... 404.3.3 POS Sub-interface............................................................................................................ 414.3.4 IP Trunk............................................................................................................................ 41

4.4 CPOS Link Features.................................................................................................................. 414.4.1 Channelization.................................................................................................................. 424.4.2 PPP/HDLC........................................................................................................................ 42

4.5 ATM Link Features..................................................................................................................... 424.5.1 SDH/SONET..................................................................................................................... 424.5.2 PVP/PVC.......................................................................................................................... 424.5.3 IPoA ................................................................................................................................. 434.5.4 ATM Sub-interface............................................................................................................. 434.5.5 ATM OAM ......................................................................................................................... 434.5.6 1483B............................................................................................................................... 434.5.7 ATM Cell Relay ................................................................................................................. 44

4.6 RPR Link Features.................................................................................................................... 454.6.1 RPR Fairness Algorithm.................................................................................................... 464.6.2 Protection Mechanism....................................................................................................... 47

4.7 CE1/CT1/E3/T3 Link Features................................................................................................... 484.7.1 PPP/HDLC/FR.................................................................................................................. 494.7.2 Channelized Links............................................................................................................. 494.7.3 Link Binding...................................................................................................................... 49

5 Primary Service Features ............................................................................................ 505.1 Ethernet Features...................................................................................................................... 50

5.1.1 Switched Ethernet Link Features....................................................................................... 505.1.2 Routed Ethernet Link Features.......................................................................................... 515.1.3 Ethernet Clock Synchronization......................................................................................... 515.1.4 MACinMAC....................................................................................................................... 525.1.5 QinQ................................................................................................................................. 545.1.6 RRPP Link Features ......................................................................................................... 595.1.7 RSTP/MSTP..................................................................................................................... 615.1.8 BPDU Tunnel .................................................................................................................... 61


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5.1.9 V-Switch............................................................................................................................ 625.2 IP Features................................................................................................................................ 62

5.2.1 IPv4/IPv6 Dual-Protocol Stacks......................................................................................... 625.2.2 IPv4 Features ................................................................................................................... 635.2.3 IPv6 Features ................................................................................................................... 635.2.4 GRE ................................................................................................................................. 635.2.5 IPv4-IPv6 Transition Technologies..................................................................................... 66

5.3 Routing Protocols...................................................................................................................... 695.3.1 Unicast Routing................................................................................................................. 695.3.2 Multicast Routing .............................................................................................................. 69

5.4 MPLS Features ......................................................................................................................... 735.4.1 Basic Functions................................................................................................................. 735.4.2 MPLS TE.......................................................................................................................... 745.4.3 MPLS OAM....................................................................................................................... 77

5.5 VPN Features............................................................................................................................ 785.5.1 Tunnel Policy .................................................................................................................... 785.5.2 VPN Tunnel ...................................................................................................................... 785.5.3 MPLS L2VPN.................................................................................................................... 795.5.4 MPLS/BGP L3VPN ........................................................................................................... 875.5.5 L2VPN Access to the L3VPN ............................................................................................ 935.5.6 VPN QoS.......................................................................................................................... 95

5.6 IPTN Features........................................................................................................................... 985.7 QoS Features.......................................................................................................................... 100

5.7.1 DiffServ Model ................................................................................................................ 1015.7.2 Traffic Classification ........................................................................................................ 1015.7.3 Traffic Policing................................................................................................................. 1025.7.4 Queue Scheduling .......................................................................................................... 1035.7.5 Congestion Management ................................................................................................ 1045.7.6 Traffic Shaping................................................................................................................ 1045.7.7 HQoS.............................................................................................................................. 1045.7.8 QPPB ............................................................................................................................. 1055.7.9 Ethernet QoS.................................................................................................................. 1065.7.10 ATM QoS ...................................................................................................................... 1075.7.11 FR QoS......................................................................................................................... 108

5.8 Traffic Statistics ........................................................................................................................1105.8.1 URPF Traffic Statistics......................................................................................................1105.8.2 ACL Traffic Statistics.........................................................................................................1115.8.3 CAR Traffic Statistics........................................................................................................1115.8.4 HQoS Traffic Statistics......................................................................................................1135.8.5 Interface-based Traffic Statistics.......................................................................................1135.8.6 VPN Traffic Statistics........................................................................................................1135.8.7 TE Tunnel Traffic Statistics ...............................................................................................113


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5.9 IP Compression........................................................................................................................1135.10 Network Security ....................................................................................................................115

5.10.1 AAA ...............................................................................................................................1165.10.2 Protocol Security Authentication.....................................................................................1165.10.3 URPF.............................................................................................................................1175.10.4 MAC Limit ......................................................................................................................1175.10.5 Unknown Traffic Limit.....................................................................................................1185.10.6 DHCP Snooping.............................................................................................................1185.10.7 Local Anti-attack.............................................................................................................1195.10.8 GTSM........................................................................................................................... 1205.10.9 ARP Anti-attack............................................................................................................. 1205.10.10 Mirroring ..................................................................................................................... 1215.10.11 NetStream................................................................................................................... 1215.10.12 Lawful Interception...................................................................................................... 123

5.11 Network Reliability ................................................................................................................. 1245.11.1 Backup of Key Modules................................................................................................. 1245.11.2 High Reliability of the LPU............................................................................................. 1255.11.3 Customized Alarm Damping .......................................................................................... 1255.11.4 Ethernet OAM ............................................................................................................... 1265.11.5 VRRP............................................................................................................................ 1285.11.6 VGMP ........................................................................................................................... 1295.11.7 GR................................................................................................................................ 1295.11.8 BFD .............................................................................................................................. 1305.11.9 FRR.............................................................................................................................. 131

6 Maintenance and Network Management System .................................................... 1356.1 Maintenance Features and Functions ...................................................................................... 135

6.1.1 System Configuration Mode ............................................................................................ 1356.1.2 System Management and Maintenance........................................................................... 1356.1.3 System Service and Status Tracking ............................................................................... 1366.1.4 System Test and Diagnosis ............................................................................................. 1366.1.5 Online Debugging ........................................................................................................... 1376.1.6 In-Service Upgrade......................................................................................................... 1376.1.7 Miscellaneous Features .................................................................................................. 137

6.2 Network Management System................................................................................................. 1377 Networking Applications ........................................................................................... 138

7.1 Application on the National Backbone Network ........................................................................ 1387.2 Application on the IP Bearer Network....................................................................................... 1397.3 Application on the IPTV Bearer Network .................................................................................. 1417.4 Application on the Multi-Service IP MAN.................................................................................. 1437.5 Application on the IPv6 Backbone Network.............................................................................. 144

8 Technical Specifications............................................................................................ 146


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8.1 Physical Specifications ............................................................................................................ 1468.2 System Configuration .............................................................................................................. 1478.3 Specifications of System Features and Service Performances................................................. 148

8.3.1 Specifications of System Features................................................................................... 1488.3.2 Specifications of Service Performances........................................................................... 153


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1 Product Features1.1 Positioning

The Huawei Quidway NetEngine80E core router (hereinafter referred to as NE80E) isa high-end router with 10-Gbit/s interfaces designed for core and backbone networks.The NE80E is positioned as the core, edge, or convergence router on theMetropolitan Area Network (MAN).

Based on the powerful Versatile Routing Platform (VRP), the NE80E features thefollowing:

l Abundant services

l Large capacity

l High performance

l

High reliability

1.2 Abundant Services

Based on the VRPv5, the NE80E provides the following abundant service features:

l IPv4/IPv6 unicast and multicast routing protocols, MPLS, and MPLS TE

l Complete VPN services, such as L2 VPN, VPLS, VLL, L3 VPN, and multicastVPN services, HoVPN services, and multi-role host services

l Abundant Layer 2 service features, such as Layer 2 VLAN, selective QinQ, QinQ

termination, MACinMAC, RRPP, and STP/MSTP

IPv4 = Internet Protocol version 4; IPv6 = Internet Protocol version 6; MPLS = MultiProtocolLabel Switching; TE = Traffic Engineering; VPN = Virtual Private Network; Virtual Private LANService; VLL = Virtual Leased Line; HoVPN = Hierarchy of VPN; VLAN = virtual LAN; LAN =Local Area Network; QinQ = 802.1Q in 802.1Q; RRPP = Rapid Ring Protection Protocol; STP =Spanning Tree Protocol; MSTP = Multiple Spanning Tree Protocol

1.3 High-Density LPUs

The NE80E provides types of interfaces.


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l LAN and MAN interfaces

10M/100M/1000M/10G Ethernet interfaces

10G POS/2.5G POS/GE RPR interfaces

l WAN interfaces

POS: 155M/622M/2.5G/10G POS interfaces

CPOS: 155M/2.5M CPOS interfaces

ATM: 155M/622M ATM interfaces

TDM: CE1/CT1/E1/T1/E3/T3 TDM interfaces

RPR = Resilient Packet Ring; WAN = Wide Area Network; POS = Packet over SONET/SDH;CPOS = channelized POS; ATM = Asynchronous Transfer Mode; TDM = Time DivisionMultiplexing

Table 1-1 Interfaces that the NE80E supports

Interface Type Quantity per Board Quantity in the System

10G POS 2 32

2.5G POS 4 64

622M POS 4 64

155M POS 16 256

10GE 2 32

GE 24 384

10G RPR 1 16

2.5G RPR 4 64

GE RPR 4 64

622M ATM 8 128

155M ATM 16 256

1.4 Powerful Forwarding Capacity

Designed with the hardware-based forwarding engine, the NE80E carries out thefollowing:

l Full-duplex line-rate forwarding that includes IPv4/IPv6/MPLS/Layer 2 forwardingof all interfaces

l Bidirectional ACL-based line-rate forwarding

l Line-rate multicasting

The hardware completes two-level packet replication:


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The SFU replicates the multicast packets to the LPU.

The forwarding engine of the LPU replicates the multicast packets to itsinterface.

A single slot supports the 2 x 10-Gbit/s LPU. The whole system supports up to sixteen

2 x 10-Gbit/s LPUs. The forwarding capacity reaches 2.56Tbit/s and the backplanecapacity is 4 Tbit/s.

The forwarding engine supports packet buffer in 200 ms. No packet loss is thusensured in the case of burst traffic.

1.5 Perfect QoS Mechanism

The NE80E provides the following QoS scheduling and buffer mechanisms:

l PQ and WRR/WFQ

They guarantee fair dispatching and ensure that high-precedence services areperformed first.

l Three-stage switching network based on the CIOQIt avoids head of line blocking.

l Flow-based dispatching

It facilitates MPLS TE and supports the DiffServ and Inter-Serv.

l Eight precedence dispatching queues

They prevent the high-precedence traffic from being interfered.

l Hardware-based QoS functions

They ensure packet forwarding at the line rate when QoS is enabled.

l HQoS of five-level scheduling

PQ = Priority Queue; WRR = Weighted Round Robin; WFQ = Weighted Fair Queuing; CIOQ =Combined Input and Output Queuing; DiffServ = Differentiated Service; QoS = Quality ofService; HQoS = Hierarchical QoS

The perfect QoS mechanism answers the demands of the IP Telephony Network(IPTN). It guarantees the delay, jitter, bandwidth, and packet drop ratio of differentservices. It also guarantees the launch of carrier-class services such as Voice over IP(VoIP).

1.6 Excellent Security Design

The NE80E takes multiple security measures to protect the data of Internet ServiceProvider (ISP) networks and end users. The measures can prevent denial-of-serviceattacks, illegal access, and overload of the control plane. The security of the NE80Eboasts of separating the data plane from the control plane.

The NE80E provides the following security features:

l Three user authentication modes: local authentication, RADIUS authentication,and HWTACACS authentication

l Hardware-based packet filtering and mirroring without affecting forwarding

capacities


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l Multiple authentication methods including plain text authentication and MD5 forupper-layer routing protocols such as OSPF, IS-IS, RIP, and BGP-4

l ACL on the forwarding plane and control plane

l Local anti-attack

l Lawful interception/URPF

l DHCP snooping and MAC address limit

l GTSM

RADIUS = Remote Authentication Dial in User Service; MD5 = Message Digest 5; OSPF =Open Shortest Path First; IS-IS = Intermediate System-to-Intermediate System; RIP = RoutingInformation Protocol; BGP = Border Gateway Protocol; ACL = Access Control List; URPF =Unicast Reverse Path Forwarding; DHCP = Dynamic Host Configuration Protocol; GTSM =Generalized TTL Security Mechanism

1.7 Good IPv4 and IPv6 CompatibilityThe NE80E fully supports the IPv4 and IPv6 dual protocol stacks. It can provide allIPv6 features, and offers a good solution to the smooth transition from IPv4 networksto IPv6 networks.

l The NE80E provides various IPv6 over IPv4 tunnels and IPv4 over IPv6 tunnels.

l The routing table and the forwarding table with large capacity enable the NE80Eto serve as the VPN Provider Edge (PE), and support future expansion ofservices.

l The NE80E supports the distributed forwarding of both IPv4/IPv6 and MPLS.Based on its powerful routing capability, the NE80E can be applied on the

backbone network.

l The NE80E supports IPv4/IPv6 dynamic unicast and multicast routing protocols.

1.8 Compatibility and Expansion Capacity

The NE80E provides powerful compatibility and expansion capacity as follows:

l The capacity of the backplane of the NE80E is greatness, which reserves enoughbandwidth for future capacity expansion.

l The NE80E forwards services through the NP, which is flexible in programming.

You can install software to carry new services.l Designed with separated TM from the PFE, the NE80E supports two PFEs,

namely ASIC and NP, to realize various applications.

1.9 High Reliability

On the basis of the carrier-class design, the chassis of the NE80E supports hot swap.It can be installed in an N68-22 or standard 19-inch cabinet.

The NE80E provides a powerful monitoring system. With the main control module, the

NE80E manages and maintains the whole system.

The main control module manages,


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monitors, and maintains boards, fans, the Liquid Crystal Display (LCD), and the powermodule.

The system complies with Electro Magnetic Compatibility (EMC). The modular designof the system realizes the EMC between boards.

The NE80E fully meets the requirements for the high reliability of carrier-class andhigh-end routers.

Table 1-2 lists its reliability specifications.

Table 1-2 Reliability specifications

Item Description

Availability 0.99999768

Mean Time Between Failures (MTBF) 24.59 years

Mean Time To Repair (MTTR) 0.5 hour

Downtime 1.22 minutes/year

The NE80E provides the following features to ensure high reliability.

Table 1-3 Reliability features

Item Description

Hot swappable boards, power modules, and fans

1:1 backup of the MPUs

3+1 load balancing and backup of the Switch Fabric Units (SFUs)

3+3 power backup and the switched-mode power supply (SMPS) ofthe DC power module

1+1 backup of the fan modules

1+1 backup of the power modules

Backup of clocks and management buses

Restarts automatically when abnormalities occurand recovers

Resets a board when abnormalities occur on theboard and recovers

Protectionsagainstabnormalities

Automatically restores the interface configuration

Provides protections against over-current and over-voltage forpower and interface modules

System

protectionmechanism

Provides protection against mis-insertion


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Item Description

Power alarmmonitoring

Provides alarm prompt, alarm indication, runningstatus query and alarm status query

Voltage andenvironmenttemperaturemonitoring

Provides alarm prompt, alarm indication, runningstatus query and alarm status query

Applies hardware-based forwarding

Separates the control channel from the service channel to provide anon-blocking control channel

Reliabilitydesign

Provides system and board fault detection, indicators, and NMSalarm function

Supports in-service patching

Supports version backoff

Supports in-service upgrade of the BootROM

The backplane provides 8BCP check

Reliableupgrade

Supports Error Checking and Correction (ECC) RAM

Data backup Supports data hot backup between active andstandby units

Synchronization

configuration

Supports the synchronization between LPUs

and Main_Control_Boards

Automatically selects and boots correct applications

Supports the automatic upgrade and restoration of the BootROMprogram

Backs up configuration files to the remote FTP server

Automatically selects and runs correct configuration files

Faulttolerancedesign

Provides the abnormality monitoring for system software, such asautomatic restoration and log record

Provides password protection for system operations

Provides hierarchical commands by the configuration of subscriberlevels and command levels

Supports configuration terminal locking by commands in case ofinvalid usage

Operationsecurity

Provides protection and prompt for improper operation, such as theoperation and confirmation prompts for some commands which maydegrade the system performance


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Item Description

Operationandmaintenancecenter

Applies the generic integrated Network Management System (NMS)platform which is developed by Huawei


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2 System Architecture2.1 Physical System Architecture

Figure 2-1 shows the NE80E physical architecture that includes the followingsystems:

l Power distribution system

l Functional host system

l Heat dissipation system

l Network management system

Except the network management system (NMS), all other systems are in theintegrated cabinet. The following takes the DC power module for an instance.

Figure 2-1 Physical architecture

Network management subsystem

-48 V -48 V RTN

Integrated

chassis

-48 V -48 V

-48 V RTN-48 V RTN

Monitorbus

Ethernet

Power distribution system

Functional host system Fan heat dissipation system

RTN indicates Return.


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Both the power distribution system and the fan heat dissipation system are in 1+1backup mode. The following introduces only the functional host system.

Functional Host System

The functional host system processes data. In addition, it monitors and manages thewhole system, such as the power distribution system, the fan heat dissipation system,and the NMS through NMS interfaces.

Figure 2-2 shows the functional host system of the NE80E.

Figure 2-2 Functional host system

System

backplane

Forwarding

unit

LPU1

Physical

interface unit

POS/Ethernet

Monitoring

bus

Management

bus

Serial link

group

Monitoring unit

Forwarding

unit

LPU 8

Management unit

Physical

interface unit

Monitoring

bus

Management

bus

Serial link

group

Monitoring

bus

Management

bus

(1)

(Active)

System monitoring

Management busswitching unit

MPU

Monitoring

bus

Management

bus

(Slave)

(1)

Switching networkmonitoring unit

Switching networkcontrol unit

Switching networkSerial link

group

SFUmodule

(1): The link connects to management bus switching unit of another MPU

Management unit

Monitoring unit

Monitoring

bus

Management

bus

POS/Ethernet

unit

switching unit

unitSystem monitoring

Management bus

MPU

MPU MPU

2.2 Logical System Architecture

As shown in Figure 2-3, the NE80E is logically divided into:

l Data plane

l Control and management plane

l

Monitoring plane


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Figure 2-3 Logical architecture

Forwardingunit

Forwardingunit

Switchingnetwork

Managementunit

Managementunit

Systemcontrol unit

Switching networkcontrol unit

Monitoring Monitoringunit

Monitoring Monitoring

Systemmonitoring unit

Forwardingunit

LPU LPU

LPU LPU

MPU

SFU

Monitoring

plane

Control &

management

plane

Data plane

unit

unit

Managementunit

Forwardingunit

Managementunit

unit

2.3 Software Architecture

Figure 2-4 shows the software architecture of the NE80E.


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Figure 2-4 Software architecture

Fan

monitoring

LCD control

Power

monitoring

RPS

Active

RPS

Standby

FSU

EFU

FSU

EFU

FSU

EFU

LPU LPU LPU

IPC

SNMP

In terms of the software, the NE80E consists of the Routing Process System (RPS),power monitoring module, fan monitoring module, LCD control module, ForwardingSupport Unit (FSU), and Express Forwarding Unit (EFU).

l The RPS is the control and management module that runs on the MPU. TheRPSs of the active MPU and the standby MPU back up each other. They supportIPv4/IPv6, MPLS, LDP, and routing protocols, calculate routes, set up LSPs andthe SPT, generate the unicast, multicast, and MPLS forwarding table, and deliverthe routing information to the LPU.

l The FSU realizes the functions of the link layer and IP protocol stacks on aninterface.

l The EFU performs hardware-based IPv4/IPv6 forwarding, multicast forwarding,MPLS forwarding, and statistics.

2.4 VRPv5 Architecture

The VRPv5 consists of:

l System service plane

It provides such functions as task and memory management, timer, softwareloading and patching on the basis of the operating system. It uses the modulartechnology to facilitate system upgrade and customization.

l Versatile control plane

It is the core of the VRP datacom plane as well as the basis of security and QoS.

It supports link management, IPv4/IPv6 protocol stacks, routing protocol


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processing, MPLS, and MPLS VPN TE. It is used to control the data forwardingplane and realize various functions of the device.

l Data forwarding plane

It forwards data under the control of the versatile control platform. The VRPv5

supports data forwarding based on software and hardware. The data forwardingplane is the task executor of the NE80E.

l Service control plane

It controls and manages the system as required, including authentication,authorization, and accounting.

l System management plane

It manages user interfaces and Input/Output. It is the basis of networkmanagement and maintenance.

The VRPv5 has the following characteristics:

l The system structure adopts the modular design.

l The components can be upgraded independently, without affecting the running ofother components.

l The system is easy to maintain and supports smooth service expansion.

l In-service patching offers flexible methods of enhancing service features andcorrecting defects. Network reliability is thus guaranteed.

l The system supports the hardware-based structure. Various modules run ondifferent CPUs. The security and reliability are thus ensured.

CPU = Center Processing Unit.


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3 Hardware Architecture3.1 Chassis

The NE80E consists of an integrated chassis (with a backplane), power modules,ventilation and heat dissipation system, and boards. The dimensions of the NE80Eare 442 mm x 669 mm x 1600 mm (width x depth x height). The NE80E can bemounted in a standard 19-inch cabinet or an N68-22 cabinet.

The inner available height of an N68-22 cabinet is 46 U and the dimensions are 600mm x 800 mm x 2200 mm (width x depth x height).

Figure 3-1 shows the appearance of the NE80E.


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Figure 3-1Appearance

1

2

3

4

4

5

7

6

8

10

9

1. LCD 2. Fan module 3, 5. Cabling trough

4. Board cage 6. Air intake frame 7. Plastic panel of the power module

8. Power module 9. Rack-mounting ear 10. Handle


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3.2 Fans

3.2.1 Fan Module

There are two fan modules behind the LCD panel in the NE80E. The fan modules helpin the air ventilation and heat dissipation of the boards.

l The fan modules can provide fan fault alarms.

l The main FAN Control Board (FCB) module in the MPU can control the speed ofthe fans based on the temperature in the board cage.

l The operation and failure indicators are on the LCD panel.

l Each fan module has two centrifugal fans.

Figure 3-2 shows the appearance of the fan module.

Figure 3-2Appearance of the fan module

3.2.2 Ventilation and Heat Dissipation System

Ventilation and heat dissipation are performed from bottom up on the board cage ofthe NE80E.

l The fans integrated on the power module are located at the bottom of thechassis.

l The air channels of the power module and the board cage are separated fromeach other.

l The air flows from the front of the power module to the back for ventilation andheat dissipation.

3.3 Power Modules

The NE80E provides two types of power supply:

l DC-input power supply

l AC-input power supply


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3.3.1 DC-Input Power Supply

The DC power module of the NE80E supports 3+3 backup of the power. The powermodule behind the plastic panel inputs DC power and distributes the power. Thepower module inputs three channels of the power and adopts the switched-mode

power supply (SMPS). Each of the power modules inputs three channels of the 48

V DC power at the same time. The three channels of the DC power supply power fordifferent modules.

Figure 3-3Appearance of the DC power module

The 48 V DC power module outputs:

l Primary straight-through power

l Secondary 48 V DC regulated voltage

The DC power module provides protections against the following:

l Short circuit

l Over-current

l Over-voltage

l Short circuit

It also supports the alarm function.

3.3.2 AC-Input Power Supply

The AC power modules of the NE80E work in 1+1 backup mode. The power modulebehind the plastic panel inputs AC power and distributes the power.

The AC power module is designed with the 3 U high structure.

Figure 3-4 shows the appearance of the AC power module.


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Figure 3-4Appearance of the AC power module

The AC power module outputs:

l 4500 W primary power

l 500 W secondary power

The AC power module provides protections against the following:

l Output over-current

l Output over-voltage

l Output under-voltage

l Input over-voltage

l Input under-voltage

l

Over-temperaturel Short circuit

It also supports the alarm function.

3.4 LCD

3.4.1 Introduction

The LCD is used to display the information and status of the board, environment, fan

module, and power module.LCD supports two display modes:

l Idle mode: the default mode. It is used to display the normal status of the system.

l Menu query mode: It can support 3-class menus at most.

3.4.2 Appearance

Figure 3-5 shows the appearance of the LCD.


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Product Description


Figure 3-5Appearance of the LCD

Cancel

Enter

Mute

Menu

FAN1RUN ALM

FAN2RUN ALM

1 2

4 3

1. FAN1 indicator 2. FAN2 indicator 3. Push buttons 4. Liquid crystal display

3.5 Board Cage

3.5.1 Board Cage

The NE80E has two board cages, each of which has 11 slots. The slots can hold 16LPUs or NetStream SPUs, 4 SFUs, and 2 MPUs.

As shown in Figure 3-6, the left is the entity diagram and the right is the schematicdiagram.

Figure 3-6 Board cage

1X10GBaseLAN-LC

1XOC-192c/STM-64cPOS-LC

1X10GBase

W

AN-LC

1

L

PU

2

L

PU

3

L

PU

5

L

PU

6

L

PU

7

L

PU

4

L

PU

8

L

PU

9

L

PU

10

L

P

U

11

L

P

U

12

L

P

U

13

L

P

U

14

L

P

U

15

L

P

U

16

L

P

U

19

S

F

U

20

S

F

U

21

S

F

U

22

S

F

U

17

M

PU

18

M

PU


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3.5.2 Board Distribution in the Board Cage

Table 3-1 shows board distribution in the board cage.

Table 3-1 Board distribution

Slot Number Quantity Slot Width Remark

116 16 41 mm (1.6 inch) LPUs

17 and 18 2 30 mm (1.3 inch) MPUs in 1:1 hot backup

1922 4 36 mm (1.4 inch) SFUs in 3+1 hot backup

3.6 Boards

The boards that the NE80E supports include:

l MPU

l SFU

l LPU

l Service Boards

3.6.1 MPU

The MPU integrates multiple functional modules such as the clock module, LANswitch module, and Compact Flash (CF) module. As the system clock source and themanagement and maintenance unit, the MPU runs as the core of system control andmanagement. It provides the functions of the control plane and the maintenanceplane.

The MPU controls and manages the system. It is designed in 1:1 backup mode. TheMPU is composed of the main control unit, the system monitoring unit, themanagement bus switching unit, and the clock unit.

l The main control unit processes network protocols and manages the wholesystem. The main control unit of each MPU is connected with the managementbus switching unit of both the master and the slave MPUs. It controls and

manages all the functional units such as MPUs, SFUs, and LPUs. The maincontrol unit also communicates with the system monitoring unit. The systemmonitoring unit reports the status and environment information about themonitoring plane to the management control plane. And then the managementcontrol plane sends control signals to the monitoring plane.

l The system monitoring unit collects the system monitoring information andinteracts with the main control unit. In addition, it monitors the status andenvironment of its MPU. It communicates with the monitoring units in the systemor other boards or subsystems through the Monitorbus.

l The management bus switching unit carries out the switching of the managementbus. It connects to the control units of two MPUs, all LPUs, and SFUs. Thus,there are two sets of management buses in the system to perform the


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Product Description


master/slave backup protection no matter which Main_Control_Board is in mastermode.

Figure 3-7 Management bus connection

MPU

LPU1

LPU16

SFU1

SFU 4

Management bus

switching unit

MPU (Active)

MPU

Management busswitching unit

MPU (Standby)

3.6.2 SFU

As the switching network unit of the NE80E, the SFU supports service data exchangefor the whole system.

The SFUs operate in 3+1 load balancing and backup mode. They share dataprocessing. When an SFU is faulty or replaced, the remaining three SFUsautomatically carry out load balancing without interrupting services.

The NE80E provides the 640 Gbit/s or 160 Gbit/s per SFU. The whole system canthus support line-rate switching of 2.56 Tbit/s or 640 Gbit/s traffic. You can select

which type of SFUs to use as required.

There is a control channel on the SFU to provide the following functions:

l Detecting voltage, current, and temperature

l Providing protections against over-voltage, over-current, and over-heat

The SFU provides the clock synchronization function. The clock synchronization unitsof the two SFUs back up each other.

3.6.3 LPU

The NE80E provides types of physical interfaces, such as GE, POS, CPOS, ATM,

RPR, and CE1/CT1/E1/T1/E3/T3 interfaces, to interconnect various network devicesas required.

Function

The LPU board consists of the Physical Interface Card (PIC), Line Processing Unit(LPU), and Fabric Adaptor (FAD).

They work jointly to realize the following functions:

l Fast processing and forwarding of service data

l Maintenance and management of the link protocol and the service forwardingtable


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The main functions of each module are described in Table 3-2.

Table 3-2 Functions of all modules on the LPU

Module Name Function Description

LPU module l Processing and encapsulation of multiple link protocols (suchas Ethernet II, and PPP)

l Traffic classification of packets and packet filtering for trafficpolicing and ACL

l Data buffer management and scheduling

l Data forwarding based on the forwarding table

l Identification of control protocol packets and packet forwardingto the active CPU through the non-line-rate interface

FAD module l Traffic management: data queuing and buffer according to the

input data traffic classification, and buffered data schedulingbased on the congestion of the switching network

l Switching network interface adaptor: the translation from theparallel port SPI4.2 to the high-speed serial port

lA part of the switching network: traffic control according to thequeuing status to ensure no data loss in the network

PIC Implementation of the functions of the physical interface,including optical/electro conversion and physical layer control

The NE80E provides Common LPUs and flexible cards.

Common LPUs

l Ethernet LPU

The NE80E supports the Ethernet LPUs shown in Table 3-3.

Table 3-3 Ethernet LPUs

LPU Name Remark

1 port 10G Ethernet LAN Optical Interface LPU (XFP opticalmodule)

!

1-port 10G Ethernet WAN Optical Interface LPU (XFP opticalmodule)

!

24-port 10M/100M/1000M Ethernet Electrical Interface LPU !

24-port Gigabit Ethernet Optical Interface LPU (SFP opticalmodule)

!

5/10-port Gigabit Ethernet Optical Interface LPU (SFP opticalmodule)

!


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The SFP and XFP are pluggable.

The 10G Ethernet optical interface LPUs can be classified into WAN and LANones.

The WAN LPU needs to adapt SDH/SONET when dealing with data packets.

Therefore, the interface of a WAN LPU can be connected with the interface ofanother WAN card or the SDH/SONET transmission device for Ethernet WANinterconnection.

The LAN LPU carries out the optical/electro conversion in Ethernet MACframes and transmits the frames by the optical fiber. The interface of the LANLPU, however, can be connected with only the interface of another LAN LPU.

The packets sent by the interfaces on the WAN and LAN LPUs can betransmitted along the Dense Wavelength Division Multiplexing (DWDM) line.

LAN = Local Area Network; SDH = Synchronous Digital Hierarchy; SONET = SynchronousOptical Network

l POS LPU

POS LPUs are used to connect the NE80E with SDH transmission devices orother devices. The NE80E provides the POS optical interface LPUs shown inTable 3-4.

Table 3-4 POS optical interface LPUs

LPU Name Remark

1-port OC-192c/STM-64c POS Optical Interface LPU (XFP opticalmodule)

!

1/2-port OC-192c/STM-64c POS Optical Interface PIM Card (XFPoptical module) Enhanced

!

4-port OC-48c/STM-16c POS Optical Interface LPU (SFP opticalmodule)

!

4-port OC-12c/STM-4c POS Optical Interface LPU (SFP opticalmodule)

!

4/8-port OC-3c/STM-1 POS Optical Interface LPU (SFP opticalmodule) enhanced

!

l RPR optical interface LPU

The RPR optical interface LPU can realize the access function of the RPR ringnetwork, and provides efficient and reliable RPR networking solutions.

The NE80E provides the RPR LPUs shown in Table 3-5.

Table 3-5 RPR LPUs

LPU Name Remark

1-port OC-192c/STM-64c RPR Interface LPU (XFP opticalmodule)

!


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LPU Name Remark

2/4-port OC-48c/STM-16c RPR Interface LPU (SFP opticalmodule)

!

2/4-port GE/STM-16c RPR Interface LPU (SFP optical module) !

Flexible Plug-in Boards

The NE80E provides the flexible plug-in motherboard (hereinafter referred to asmotherboard) to enhance networking flexibility. The NE80E also provides low-costand customized solutions as required. The motherboard works with the flexible card toprovide the flexible plug-in feature; thus the hardware configuration is flexible.

The NE80E supports four types of motherboards and their flexible cards.

l Motherboard LPUF and its flexible cards

LPUF provides two slots, in which two of the full-height flexible cards listed inTable 3-6 can be inserted.

Table 3-6 Flexible cards supported by LPUF

Flexible Card Name Remark

3-port E3 Interface Flexible Card !

3-port T3 Interface Flexible Card !

l Motherboard LPUF-D and its flexible cards

LPUF-D provides two slots, in which two of the full-height flexible cards listed inTable 3-7 can be inserted.

Table 3-7 Flexible cards supported by LPUF-D

Flexible card Name Remark

8-port CE1 Interface Flexible Card !

8-port CT1 Interface Flexible Card !

1-port OC-3c/STM-1 CPOS Interface Flexible Card !

l Motherboard LPUF-10 and its flexible cards

LPUF-10 provides two slots, in each of which one full-height or two half-heightflexible cards can be inserted.

The flexible cards supported by LPUF-10 are hot swappable. They supportautomatic configuration restoration and card intermixing.


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Table 3-8 Flexible cards supported by LPUF-10


1-Port OC-192c/STM-64c POS-XFP Flexible

Card

It is a full-height card.

1-Port OC-48c/STM-16c POS-SFP Flexible Card It is a half-height card.

8-Port 100/1000Base-X-SFP Flexible Card It is a half-height card. Itsupports Ethernet clocksynchronization. In addition,ports 0 and 1 supportsynchronization of sending andreceiving clock signalssimultaneously; other portssupport only synchronization ofsending clock signals.

2-Port OC-12c/STM-4c ATM-SFP Flexible Card It is a half-height card.

4-Port OC-3c/STM-1c ATM-SFP Flexible Card It is a half-height card.

l Motherboard LPUF-20 and its flexible cards

When the 40-Gbit/s SFU is used on the NE80E, the system can support LPUF-20.And each motherboard can support 2 daughter cards.

Table 3-9 lists the flexible cards that LPUF-20 supports.

Table 3-9 Flexible cards supported by LPU-20


1-Port /2-Port10GBase WAN/LAN-XFP Flexible Card You can configure theinterface to run in LAN orWAN mode throughcommands.

12-Port 100/1000Base-SFP Flexible Card The card supportsEthernet clocksynchronization. Inaddition, ports 5 and 6

support synchronizationof sending and receivingclock signalssimultaneously; otherports support onlysynchronization ofsending clock signals.


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Product Description



12-Port 10/100/1000Base-RJ45 Flexible Card The card supportsEthernet clocksynchronization. Inaddition, ports 5 and 6support synchronizationof sending and receivingclock signalssimultaneously; otherports support onlysynchronization ofsending clock signals.

3.6.4 Service Boards

Without interfaces, service boards perform centralized processing of specific servicesonly. At present, the NE80E provides the following types of service processing boards:

l TSU

l NetStream SPU

TSU

The Tunnel Service Unit (TSU) is used to process the tunnel services related toGeneric Routing Encapsulation (GRE), BFD, lawful interception, and multicast VPN.

NetStream SPU

NetStream enables the system to sample packets according to a certain percentage.The system sets up NetStream flows in accordance with the abstracted informationabout the packet such as the source IP address, destination IP address, source portnumber, destination port number, IP protocol type, IP ToS, inbound/outbound interface,TCP flag, and MPLS three-layer labels, and collects flow-based statistics.

The NE80E provides the following types of NetStream:

l Integrated NetStream: The system samples packets on the LPU, and collectstraffic statistics on the NetStream SPU. In this manner, the processingperformance is high, without affecting the forwarding capability.

l Independent NetStream: The system samples packets and collects traffic

statistics on the LPU.

NetStream Service Processing Units (SPUs) include 2.5-Gbit/s and 10-Gbit/s SPUs.You can select which type of SPUs to use as required.

The NE80E provides multiple SPUs for load balancing.

For details on NetStream, see the section "NetStream."


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4 Link Features4.1 Ethernet Link Features

4.1.1 Basic Features

The Ethernet link provided by the NE80E supports the following:

l VLAN trunk

l VLANIF

l VLAN aggregation

l Inter-VLAN port isolation

l Ethernet sub-interface

l VLAN sub-interface

l VLAN switch

l Ethernet clock synchronization

4.1.2 Ethernet Bundling

Link aggregation refers to a method of bundling a group of Ethernet physicalinterfaces to a logical interface Eth-Trunk to increase the bandwidth.

The Eth-Trunk of the NE80E functions as follows:

l Supports the bundling of up to 16 physical interfaces. The formed Eth-Trunkinterface runs as the normal Ethernet interface.

l Supports the bundling of ports of different rates.

l Supports active/standby mode and performs active/standby switchover

automatically in accordance with the link status of the interface.

The NE80E provides link aggregation in two modes:

l Port bundling in manual mode

l Link aggregation in static LACP mode

Layer 2 Ethernet Bundling Interface

When you run the portswitchcommand for the formed Eth-Trunk interface, the

interface becomes a Layer 2 Ethernet bundling interface. The Eth-Trunk interface thenprovides the following features of the switched Ethernet link:

l VLAN interfaces


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Product Description


l Inter-VLAN port isolation

l VLAN aggregation

l VLAN trunk

l VLAN mapping

l QinQ and VLAN stacking

l Layer 2 features such as MSTP and RRPP

l Switched Ethernet links

Layer 3 Ethernet Bundling Interface

By default, the formed Eth-Trunk interface is a Layer 3 Ethernet bundling interface.The Eth-Trunk interface then provides the following features of the routed Ethernetlink:

l IPv4/IPv6 forwarding

l MPLS forwardingl Multicast forwarding

l L3VPN

l L2VPN

LACP (802.3ad)

The NE80E supports link aggregation in Link Aggregation Control Protocol (LACP)static mode. Link aggregation in static LACP mode is in contrast with the linkaggregation in manual mode. Port bundling in manual mode requires neither LACPnor exchange of protocol packets. Port aggregation is specified by the administrator.

Link aggregation in LACP static mode resorts to LACP and automatically maintainsthe interface status by exchanging protocol packets. The administrator, however,needs to create the aggregation group and add the member links manually. LACPcannot change the configuration of the administrator.

The NE80E supports LACP that conforms to IEEE 802.3ad. The administrator createsthe Eth-Trunk interface, adds member ports to it, and enables LACP on the Eth-Trunkinterface. The NE80E negotiates which ports to use for data forwarding with the peerdevice by exchanging LACP protocol packets. That is, they negotiate to determinewhether the outbound interface is in the selected or standby state.

LACP maintains the link status in accordance with the port status. Once theaggregation conditions change, LACP automatically adjusts or de-aggregates the link.

4.1.3 Virtual Ethernet Interfaces

The NE80E supports virtual Ethernet interfaces. By mapping the ATM PVC to themanually-created virtual Ethernet interface, Ethernet packets can be transmitted overthe ATM Adaptation Layer (AAL5). The virtual Ethernet interface thus provides Layer 2switched and Layer 3 IP services.

4.2 FR Link Features

Frame Relay (FR) is a fast packet switching technology to forward and switch data ina simple way on the link layer.


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FR only realizes functions of the physical layer and the link layer of OSI. Traffic controland error correction are implemented by the intelligent terminal. In this way, systemperformance is improved.

FR uses virtual circuits to make full use of network resources. Therefore, FR features

large throughput, short delay. FR is applicable to burst services.

The NE80E provides the following FR features:

l DLCI

l VC: PVC and SVC

l FR address mapping

l FR LMI

l FR sub-interfaces

l FR switch PVC backup

l FR compression

l MFR

DLCI = Data Link Connection Identifier; PVC = Permanent Virtual Circuit; SVC = SwitchingVirtual Circuit; LMI = Local Management Interface; MFR = Multilink Frame Relay

4.3 POS Link Features

4.3.1 SDH/SONET

The physical layer of the POS link adopts the Synchronous Optical Network (SONET)

defined by the ANSI or the Synchronous Digital Hierarchy (SDH) defined by the ITU-T.POS interfaces provide alarms for the physical layer.

4.3.2 POS Interface

The NE80E provides POS interfaces of 155 Mbit/s, 622 Mbit/s, 2.5 Gbit/s, and 10Gbit/s.

On the link layer, POS supports:

l Point-to-Point Protocol (PPP)

l High-level Data Link Control (HDLC)

l FR

PPP on the POS interface supports:

l Link Control Protocol (LCP)

l Internet Protocol Control Protocol (IPCP)

l Multi-Protocol Label Switching Control Protocol (MPLSCP)

l Multilink Protocol (MP)

l Password Authentication Protocol (PAP)

l Challenge Handshake Authentication Protocol (CHAP)


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4.3.3 POS Sub-interface

On the NE80E, you can manually create POS sub-interfaces, to provide multiplelogical links over a POS link. Then, you need to configure FR on the link layer of thePOS sub-interface to interwork with the network-layer device that supports POS FR orthe FR switch that supports POS interfaces. POS sub-interfaces support point-to-point(P2P) and point-to-multipoint (P2MP).

4.3.4 IP Trunk

Adopting IP trunk technology, you can bind multiple physical POS interfaces into alogical trunk interface as shown in Figure 4-1. You can configure the trunk interface toimplement routing protocols and carry MPLS and VPN services. The physical POSinterfaces that are bound to a trunk are called trunk members. All configurations onthe trunk interface also take effect on the trunk members. The trunk members use theIP address of the logical trunk interface.

The IP trunk technology helps to:l Increase bandwidth

The bandwidth of the trunk interface is the sum of member bandwidth.

l Enhance reliability

If a member link fails, the traffic of this link is automatically switched to otheravailable links. This can improve the reliability of the whole trunk.

l Carry out load sharing

Different flows pass through different trunk members.

Figure 4-1 IP trunk

Trunk

The NE80E supports:

l Inter-board IP trunk

l IP trunk of channels with different rates

l Dynamic establishment and removing of IP-trunk interfacesl Binding a physical channel to a trunk through the command line on a physical

interface

4.4 CPOS Link Features

In a network, a great number of access devices are connected to the upstreamconvergence devices through the low-speed E1/T1 interfaces. In this case, theconvergence devices need to possess the capability of converging many low-speedE1/T1 or POS interfaces. On the NE80E, the CPOS interfaces of various rates can

answer the requirements mentioned above.


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4.4.1 Channelization

A CPOS interface is a channelized POS interface. Channelization is carried out bytransmitting multiple independent data flows on an optical fiber through the low-speedbranch signals of STM-N. Each data flow has its own bandwidth and monitoring policy.When multiple low-speed signals are sent, bandwidth can be better utilizedchannelization.

The granularity of CPOS interface channelization is as follows:

l The 2.5G CPOS LPU can provide sixteen 155M POS channels.

l The 155M CPOS LPU can provide 63 E1 channels, 84 T1 channels, or 1023 64Kchannels.

l The 155M CPOS LPU can provide 3 E3 or 3 T3 channels.

The NE80E supports binding of E1/T1 channels. Up to 12 channels can be bound in abinding set. Each 155M CPOS LPU supports up to 168 binding sets.

4.4.2 PPP/HDLC

The NE80E provides 155Mbit/s and 2.5Gbit/s CPOS interfaces.

On the link layer, CPOS supports:

l PPP

l HDLC

PPP on the CPOS interface supports:

l LCP

l

IPCPl MPLSCP

l MP

l LFI

l PAP

l CHAP

4.5 ATM Link Features

4.5.1 SDH/SONET

The ATM interfaces of the NE80E support SONET/SDH as well as the SONET/SDHoverhead configuration and mapped physical-layer alarms.

4.5.2 PVP/PVC

ATM interfaces support the PVP/PVC creation:

l Nonreal-time Variable Bit Rate (NRT_VBR)

l Unspecified Bit Rate (UBR)

l Permanent Virtual Circuit (PVC)


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l Traffic shaping based on VP/VC

l User-to-Network Interface (UNI) signaling

l RFC1483: Multiprotocol Encapsulation over ATM Adaptation Layer 5

l RFC1577: Classical IP and ARP over ATM

l F5 End-to-End Loopback OAM

l ATM Adaptation Layer 5 (AAL5)

4.5.3 IPoA

IP over ATM (IPoA) is a kind of technology to bear IP services on the ATM network. Itinherits the fundamentals of TCP/IP and regards the ATM network as a kind ofphysical subnet. For IP protocols, the ATM network is equivalent to the physicalsubnet such as the Ethernet. Using IPoA, you can directly run IP protocols andnetwork applications in the ATM network.

On the NE80E, you can set up address mapping between PVC and the IP address of

the peer device in two ways:

l Static mapping

l Inverse Address Resolution Protocol (InARP)

4.5.4 ATM Sub-interface

The NE80E supports the ATM sub-interface. The ATM interface supports multiplevirtual connections at the same time, and the peer networks of virtual connections arein different network segments. In this case, you need to create sub-interfaces on theinterface to support communications with different peers. You can configure multiplePVCs on one sub-interface.

4.5.5 ATM OAM

ATM Operation, Administration and Maintenance (OAM) checks the fault, locates thefault, and detects the performance, without interrupting services. ATM OAM providesspecific information about the network by adding the OAM cell in the standard cellformat to the user cell.

The NE80E supports the F4 and F5 OAM. The OAM functions to check the statuses ofthe PVP and PVC links, that is, to check whether the link is Up or Down.

4.5.6 1483B

RFC 1483 defines the technological standards of transmitting multi-protocol data uniton the ATM network, including the following two kinds:

l The 1483 Bridged

It is applied to the bridged protocol data unit.

l The 1483 Routing

It is applied to the routing protocol data unit.

The RFC 1483 Bridged encapsulates the data packet of the network layer in the datalink layer. It imitates the bridge function of the Ethernet network, so that the terminaldevices at the user side and the bridge devices at the network side are connected.

Figure 4-2 shows the stack protocol of 1483B.


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Product Description


Figure 4-2 Stack protocol of 1483B

Access router

IP

Ethernet

1483B

AAL5

ATM

TCP/UDP

IP

Ethernet

TCP/UDP

ATM network

RouterA RouterB

The IPoE Ethernet stack protocol is used to connect the device at the user side. After

1483B is configured on the ingress Router A on the ATM network, Router A canimplement the bridge of Ethernet packets to the ATM cells, so that the received IPoEpackets can be transmitted transparently on the ATM network.

IPoEoA is the main application of 1483B supported by the NE80E. IPoEoA indicatesthat AAL5 bears Ethernet packets, and the Ethernet bears IP packets, so that thelayer 2 forwarding of IPoEoA packets between the Ethernet and PVC can beimplemented. IPoEoA converges the ATM backbone network and the IP network andsupports Ethernet protocols and IP protocols.

4.5.7 ATM Cell Relay

PWE3 uses the PNS network to connect the traditional networks such as ATM, FR, or

LAN and provides the emulated traditional services. Thus, the existing network andinvestment of users and carriers are protected and utilized.

The Layer 2 emulate services on the PSN set up the P2P tunnel and convey the datapacket, cell and bit stream through the public or private PSN. Between the two PErouters of the PW, the original service is emulated.

Figure 4-3 shows the label encapsulation used when the PSN transparently transmitsthe ATM service.


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Figure 4-3 Network diagram for ATM encapsulation over a PSN

PSN Tunnel

Pseudo-wire

MPLS

Network

L2

Network

ATM Service

MPLS PSN tunnel

identified by outer label

PSN Transport Header

ATM Encapsulation

over PSN

Pseudo-wire Header

Pseudo-wire identified

by inner label

Outer MPLS Label

Inner MPLS Label

ATM Control Word

ATM Service Payload

L2

Network

PE PE

ATM Service

The outer PSN label identifies the PSN tunnel, while the inner label, namely, PWHeader identifies a PW.

In ATM cell transport, the following two kinds of services are transmitted on the PSN:

l The services whose PW payload is ATM cells

l The services whose PW payload is AAL5 SDU/PDU

ATM cell transport can help transfer the earlier ATM or ISP network through the PSNnetwork without adding new ATM devices and changing the ATM CE configurations.ATM CE routers consider the ATM cell transport service as the TDM leased line.

The NE80E support ATM cell transport over Permanent Virtual Circuit (PVC) andPermanent Virtual Path (PVP).

Generally, the NE80E support the following ATM cell transport modes:

l ATM whole port cell transport

l 1-to-1 VCC cell transport

l N-to-1 VCC cell transport

l 1-to-1 VPC cell transportl N-to-1 VPC cell transport

l ATM AAL5-SDU VCC transport

4.6 RPR Link Features

The NE80E supports RPR networking. Based on the packet-based optical transporttechnology, RPR provides access to multiple services. Integrating the broadbandwidth and fast self-healing capability of the optical network, RPR providescost-effective services for the carriers over the current optical network.


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An RPR ring adopts the topology of two counter-rotating ringlets. An RPR networkconsists of Ringlet0, Ringlet1, stations, and spans, as shown in Figure 4-4.

Figure 4-4 RPR networking diagram

Ringlet0

Station

Domain

Span

Ringlet1East

East

East

East

East

East

West

West

West

West

West

West

As shown in Figure 4-4, each node of the RPR network is connected by two pairs offibers for ringlet 0 and ringlet 1 transmission and receiving. In the RPR network, theunicast traffic only travels between its source node and destination node, thusimproving the bandwidth utilization.

4.6.1 RPR Fairness Algorithm

RPR controls network congestion through RPR Fairness Algorithm (RPR-FA). If anode is congested, it sends an RPR fairness packet to its upstream node through thecounter-clockwise ring. The fairness packet also serves to maintain the link status.According to the information in the packet, the upstream node adjusts its transmissionrate to avoid congestions.

RPR-FA controls only the transmission of packets with low precedence. The packetswith high precedence are not controlled by RPR-FA and are sent as long as there areenough transit buffers.

RPR automatic switch is implemented through four kinds of control packets:l Topology and Protection packet (TP) are broadcast on the whole ring.

l Topology Checksum (TC) packet are sent or received only between adjacentnodes.

l Attribute Discovery (ATD) packet is used to update the site information in thetopology database except the topology discovery and checksum.

l Link Round Trip Time (LRTT) packet is used to detect the delay ofhigh-preference control frames among all nodes on the network.


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4.6.2 Protection Mechanism

In the RPR network, if a node fails, the protection mechanism can make the trafficpass through the failed node. If a line fails, the protection mechanism can transfer thetraffic to the ring in the opposite direction (in wrapping mode), or change the directionof the traffic (in steering mode). The protection mechanism can implement RPRforward performance monitoring, event detection, fast self-healing and fast recoveryof service in case of the node or fiber failure. Thus, the network can detect events andrespond to them appropriately to ensure continuous services.

Pass-Through

Some node failures may stop Layer 3 forwarding temporarily, but the MAC layer canstill forward packets. You can set the node in pass-through mode by shutting down theRPR interface. In this case, all packets that reach this node are forwarded intransparent mode and this node is invisible in the RPR network, as shown in Figure4-5.

Figure 4-5 Pass-Through mode

Pass-through

Wrapping and Steering

When failures like fiber disconnection occur, the system adopts two self-healingmodes, namely wrapping and steering.

l In the wrapping mode, the traffic that is transmitted on the ringlet 0 from A to B issent to the node adjacent to the failed line, and then to B on the ringlet 1. SeeFigure 4-6.

l In the steering mode, the traffic that is previously on the ringlet 0 is directlyredirected to the ringlet 1 for transmission. See Figure 4-7.


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Figure 4-6 RPR network in wrapping mode

A

B

RPR

Figure 4-7 RPR network in steering mode

RPR

A

B

The wrapping mode and steering mode in RPR have their respective advantages anddisadvantages. The wrapping mode implements fast switchover without data loss, butwastes the bandwidth. The steering mode needs neither loopback nor wrapping, andthus does not waste the bandwidth, but it implements a slow protection with data loss.

The RPR designed by Huawei combines the advantages of these two modes, andadopts the "first wrapping and second steering" mode. Providing the failure protectionswitchover within 50 ms, it implements non-stop services without bandwidth waste toachieve the best performance.

4.7 CE1/CT1/E3/T3 Link Features

The NE80E provides CE1, CT1, E3, and T3 interfaces.


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4.7.1 PPP/HDLC/FR

CE1/CT1/E3/T3 interface supports serial interfaces and the following link protocolsare supported:

l PPPl HDLC

l Frame Relay supported by the CE1/CT1 interface

PPP on the serial interface supports:

l LCP

l IPCP

l MP

l PAP

l CHAP

4.7.2 Channelized Links

The CE1/CT1 links can be channelized to 64 K links.

4.7.3 Link Binding

Multiple CE1 or CT1 interfaces can be bundled as a logical interface. Each bundlingset contains up to 12 channels. Each CE1 LPU supports a maximum of 168 bundlingsets.


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5 Primary Service Features5.1 Ethernet Features

5.1.1 Switched Ethernet Link Features

The Ethernet interfaces of the NE80E can run as switched interfaces to provide VLAN,VPLS, and QoS services. They can also run at the User Network Interface (UNI) sideto support MPLS VPN.

VLAN Trunk

Trunk is a P2P link between two routers. The interfaces on the connected routers arecalled trunk interfaces. One VLAN trunk can transmit data flows of different VLANsand allow the VLAN to contain the interfaces of many routers. The NE80E can

dynamically add, delete, or modify the VLANs of a VLAN trunk to maintain theconsistency of VLAN configuration in the whole network. The NE80E can also workwith non-Huawei devices for interworking.

VLANIF

After setting up a VLAN, you can create VLAN interfaces (VLANIF). A VLAN interfaceis a virtual interface with Layer 3 (IP layer) features. You can assign IP addresses andenable routing protocols on a VLAN interface to make it equivalent to the routedEthernet interface. You can also add several switched Ethernet interfaces to a VLAN.

On the NE80E, VLANs can be configured and displayed in batch.

VLAN Aggregation

Inter-VLAN routing is involved in the communication between VLANs. If each VLANinterface is assigned an IP address, IP address resources will be used up.

You can aggregate

NE80E V300R003 Product Description

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