ZXR10 2600 Product Description - ZTEzte.by/manuals/26xx/ZXR10 2600 Product Description.pdf · 6.1...

ZXR10 2600 Product Description


ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. I


Version Date Author Approved By Remarks

V1.00 2008-05-30 Ma yucheng Ma gang Not open to the Third Party

V2.00 2009-09-16 Ma yucheng Ma gang Updating format

© 2009 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.


II © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary

TABLE OF CONTENTS

1 Overview .......................................... ........................................................................... 1

2 Highlight Features ................................ ...................................................................... 2 2.1 Full wire-speed forwarding ........................................................................................... 3 2.2 Good security performance ......................................................................................... 3 2.3 Rate limit for ports of different categories .................................................................... 3 2.4 Dynamic binding .......................................................................................................... 3 2.5 Port mirroring ............................................................................................................... 3 2.6 Compact structure ....................................................................................................... 4 2.7 Complete support for protocols.................................................................................... 4 2.8 VCT and Loopback Test .............................................................................................. 4 2.9 Integrated network management capacity ................................................................... 4

3 Functionality ..................................... .......................................................................... 5 3.1 Security functions ........................................................................................................ 5 3.2 Supporting L2 protocols ............................................................................................... 5 3.3 Service functions ......................................................................................................... 5 3.4 Device management .................................................................................................... 6

4 System Architecture ............................... ................................................................... 7 4.1 Product Physical Structure .......................................................................................... 7 4.1.1 Composition of the Equipment .................................................................................... 7 4.1.2 Console Port ................................................................................................................ 8 4.1.3 FE Port ......................................................................................................................... 8 4.1.4 Cabling ......................................................................................................................... 9 4.2 Hardware Architecture ................................................................................................. 9 4.2.1 Overall Architecture ..................................................................................................... 9 4.3 System Software ........................................................................................................ 10 4.3.1 Overview .................................................................................................................... 10 4.3.2 Data Processing Procedure ....................................................................................... 10

5 Technical Specifications .......................... ............................................................... 13

6 Networking ........................................ ........................................................................ 14 6.1 Workgroup Networking Mode .................................................................................... 14 6.2 MAN Broadband Access Networking Mode .............................................................. 14

7 Acronyms and Abbreviations ........................ ......................................................... 16


ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. III

FIGURES

Figure 1 ZXR10 2600 series L2 Ethernet switch ......................................................................... 1 Figure 2 Outer View of Sub-rack of the ZXR10 2609 .................................................................. 7 Figure 3 Front Panel of the ZXR10 2609 ..................................................................................... 7 Figure 4 Back Panel of the ZXR10 2609 ..................................................................................... 7 Figure 5 Outer View of Sub-rack of the ZXR10 2609-FU ............................................................ 8 Figure 6 Front Panel of the ZXR10 2609-FU ............................................................................... 8 Figure 7 Back Panel of the ZXR10 2609-FU ............................................................................... 8 Figure 8 ZXR10 2600 Hardware Architecture with Fixed Ports ................................................... 9 Figure 9 Software Architecture................................................................................................... 10 Figure 10 Typical Workgroup Networking Structure .................................................................... 14 Figure 11 TYPICAL NETWORKING OF MAN BROADBAND ACCESS ..................................... 15

TABLES

Table 1 Maximum Cable Length ................................................................................................. 9 Table 2 The ZXR10 2600 series switches technical specifications .......................................... 13 Table 3 Acronyms and Abbreviations ....................................................................................... 16


ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. 1

1 Overview ZXR10 2600 are access switches with excellent performance and diversified functions promoted by ZTE. It provides small and medium density of LAN ports to satisfy the requirements of branches of small to medium enterprises, department network building and carriers.

ZXR10 2600 series access switches are designed based on the diversified networking and application needs of the users. Positioned in enterprise network, providing different quantity of Ethernet ports, ZXR10 2600 series access switches are suitable to work as user-side access device in informative intelligent community, office building, hotel, campus network and enterprise network (government network). They provide users with high-speed, highly-efficient access solutions with high performance price ratio. Positioned at access layer of carriers’ network, their rich interfaces and multiple practical functions can satisfy the broadband IP access service requirements of telecom carriers. They have become the standard devices of new-generation economical broadband IP access.

By providing complete elementary security policy, QoS, availability and manageability, ZXR10 2600 series switches reduce the total cost of ownership of the network. They provide users with high bandwidth connection and port separation between users to guarantee security. They also provide users with an approach to transfer from unintelligent hub and unmanageable switch to manageable network easy to expand.

There are two models for ZXR10 2600 series: 2609 and 2609-FU.

ZXR10 2600 series switches have rich interface types. 2609 have 9 10/100M Ethernet electrical ports. Among them one interface is uplink port. 2609-FU has 8 10/100M Ethernet electrical port and a 100M optical port.

Figure 1 ZXR10 2600 series L2 Ethernet switch

ZXR10 2600 series switches have the following features:

• Full wire-speed forwarding: supporting full port wire-speed exchanging. Providing 100% throughput, zero packet dropping ratio and low delay. Providing users with high-performance access.

• Good security policy: supporting broadcast storm suppression. Supporting 1x authentication, port separation, user hierarchical management and password


2 © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary

protection. Supporting DHCP Snooping. Supporting VBAS. supporting CPU protection mechanism.

• Supporting port binding. Being able to implement 16 groups with binding of up to 8 ports. supporting cross-device port binding with flexible access and networking.

• Port mirroring: being able to implement particular port monitoring. Being able to support ingress mirroring and egress mirroring. Mirroring source and destination is permitted to cross device in the situation of stacking.

• Supporting protocols of: IEEE802.3, IEEE802.3u, IEEE802.3z, IEEE802.3x, IEEE802.1x, port-based VLAN, IEEE802.1q, IEEE802.1d, IEEE802.1w, IEEE802.1s, IEEE802.1ad, Telnet, IGMP Snooping, RMON, and SNMP.

• Port-based rate limit includes ingress rate limit and egress rate limit. The minimal granularity for both ingress and egress is 64K. Ingress rate limit includes unicast, multicast and broadcast.

• QoS capability: being able to provide 1M shared buffer. Adopting multiple measures to provide QoS guarantee such as traffic control. Supporting traffic control in half/full-duplex state, back-pressure traffic control in half-duplex state, 802.3x traffic control in full-duplex state. Supporting filtering, being able to automatically check illegal frames (jumbo frame, short frame or CRC error frame) and drops them. Being able to classify ports into four priority levels based on services and provide users with broadband access with high QoS guarantee.

• Complete network management functions: Supporting SNMP management, CLI command line, SSH, Telnet, RMON and ZGMP cluster management. Being able to implement graphic management during the whole course in the whole network working with NetNumen N31 network management system



2 Highlight Features

2.1 Full wire-speed forwarding

The switching system of ZXR10 2600 series adopts the bus architecture. The switching capacity of the 2609, 2609-LE/2609-FU backplane is 6.4 Gbps. The full wire speed layer 2 forwarding capability provides 100% throughput, zero packet loss ratio and low delay to provide high performance user accesses.

2.2 Good security performance

ZXR10 2600 series switches have good security policies. They support broadcast storm suppression, support 1x authentication, port separation, and IEEE802.1Q. They can divide VLAN based on port or MAC addresses and supports port-based VLAN. They support user hierarchical management and password protection. they support DHCP Snooping, VBAS, and CPU protection mechanism.

High strength thunder-proof capability: ZXR10 2600 series switches are Richer 8 earthquake resistant. They can run normally in terrible environment.

2.3 Rate limit for ports of different categories

ZXR10 2600-EI series L2 Ethernet switches have rate limit for ports of different categories. Highly efficient multiple leaky bucket algorithm is adopted. Unicast uses one leaky bucket and other traffic flows use the other leaky bucket. Each leaky bucket uses different bandwidth. Controlling policy is quite complete. Unknown unicast and MAC controlling frame can be restricted besides ordinary broadcast, multicast and unicast. On one hand, it can protect user bandwidth against appropriation and on the other hand, it can effectively control network viruses which may cause invalid broadcast traffic.

2.4 Dynamic binding

ZXR10 2600 series switches support particular MAC/PORT dynamic binding. Combining with IEEE802.1x authentication, dynamic binding is accessed to MAC address, which is especially suitable for laptop access environment. They support users’ transferring and switching between switch ports without manual interference to reduce network maintenance workload.

2.5 Port mirroring

Supporting port mirroring: Being able to monitor particular port. ZXR10 2600 series switches can monitor ingression and engrossing flow at other ports via data capturing port. They can also set source/destination MAC address of ingression and engrossing



flows to monitor the designated addresses. Capturing port and monitored port could be on one device or on different devices connected by stacking.

2.6 Compact structure

ZXR10 2600 series L2 Ethernet switches can satisfy the requirements of multiple access occasions such as office building in enterprise network and MAN, and community access point. With a compact small structure, adopting external AC power supply, ZXR10 2600 series L2 Ethernet switches can be deployed in community racks or as desktop application.

2.7 Complete support for protocols

ZXR10 2600 series L2 Ethernet switches support a great variety of protocols as follows: IEEE 802.3 10Base-T Ethernet protocol, IEEE 802.3u 100Base-TX fast Ethernet protocol, IEEE 802.3x traffic control protocol, IEEE 802.1x user authentication and accounting protocol, port-based VLAN and IEEE 802.1q-based VLAN protocol, IEEE 802.1d STP (Spanning Tree Protocol), IEEE802.1w RSTP (Rapid Spanning Tree Protocol), IEEE 802.1s MSTP (Multi-Spanning Tree Protocol), IEEE802.3ad LACP (Link Aggregation Control Protocol), RFC854 Telnet, RFC2236 IGMP Snooping, RFC1757 RMON (4-group remote monitoring) protocol, and RFC1213 SNMP. (Simple Network Management Protocol)

2.8 VCT and Loopback Test

VCT is a virtual cable test technology which adopts the time domain reflection (TDR) method to detect the cable quality, connectors, and terminators. The VCT can diagnose open circuit, short circuit, mismatching of cable impedance, damaged connector, mismatching of terminator, and poor electromagnetic performance. The application of the VCT technology greatly facilitates the engineering maintenance of LAN Switches.

ZXR10 2600 series L2 Ethernet switches provide bi-directional loopback, which is line loopback, looping back to peer to diagnose whether data receiving and sending at Ethernet port is normal.

2.9 Integrated network management capacity

ZXR10 2600 series switches support RFC1213 SNMP. In-band network management adopts Telnet-based configuration management (by CLI command line) or SNMP-based configuration management (graphic interface) to implement NetNumen N31 network management platform-based integrated network management. NetNumen N31 data network management system is a highly user-oriented, carrier-class, and cross-platform data network management platform based on new Internet technology according to top-down rule. It can implement integrated management and control of various data products of ZTE routers, Ethernet switches, broadband access server, and xDSL.

ZXR10 2600 series switches support WEB+JAVA-based network management, providing guide configuration and simplifying configuration process. They support ZGMP cluster management protocols; automatic discovery and ZTE switch group management.



3 Functionality

3.1 Security functions

• Supporting multiple address table, static and dynamic table items, address filtering, port address restriction, automatic learning, CPU learning, and learning prohibition.

• Supporting 802.1x authentication, port MAC binding, port separation, user hierarchical management and password protection.

• Supporting broadcast, multicast and unicast packet suppression.

• Supporting standard 802.1Q and port-based VLAN. Supporting GVRP, STP, MSTP, RSTP and supporting VLAN stacking.

3.2 Supporting L2 protocols

• Supporting IGMP Snooping, DHCP.

• Supporting STP, RSTP and MSTP. Supporting hybrid networking of the above mentioned protocols.

• Supporting IEEE802.3ad LACP, supporting LACP (802.3AD).cross-device is implemented in case of stacking.

• IEEE802.1x user authentication.

• Supporting standard Ethernet protocol suites of IEEE802.3, IEEE802.3u, IEEE802.3z, IEEE802.3ab, IEEE802.3ad, and IEEE802.3x etc.

• Supporting MAC address binding and port separation.

3.3 Service functions

• MDI/MDIX self-twisted cable: getting rid of the complexity of cable type distinguishing in practice and reducing workload of network installation and maintenance.

• Port mirroring: supporting ingression mirroring and egression mirroring. Cross-device can be implemented for mirroring source and destination in case of Flow control: half-duplex supports counter pressure. Full duplex supports 802.3x.



Supporting ingress rate limit, egress shaping, and rate limit for multicast and broadcast packets.

• Port rate limit includes ingression rate limit and egression rate limit with the minimal granularity of 64K. Ingression rate limit policy includes unicast, multicast and broadcast.

• DHCP: supporting DHCP Snooping, DHCP Relay, and DHCP Server.

• Multicast: supporting IGMP Snooping, and GMRP.

• Authentication: supporting IEEE802.1x.

• QoS: four priorities at each port. Strict priority or WRR scheduling is adopted to classify based on port, 802.1p, TOS/DiffServ, Ipv6 TC, VID, DA or SA.

3.4 Device management

• Implementing statistics of port-based incoming/outgoing packets and bytes counting, unicast and multicast counting, and packet length classification counting.

• Diagnosis supporting open circuit/short circuit detecting, fault point distance location, and line loopback.

• Supporting multiple network management protocols such as SNMP, RMON, Telnet, local command line CLI.

• In-band network management can adopt Telnet/Console-based command line configuration management, or SNMP-based graphic interface configuration management.

• Supporting integrated network management based on NetNumen N31 graphic network management platform.

• Supporting WEB network management without client. Being able to manage devices via browser of IE.

• ZGMP cluster management, command line mode or graphic mode can be selected.

• Supporting SSHv2.

• Supporting user network management local and remote authentication.



4 System Architecture

4.1 Product Physical Structure

4.1.1 Composition of the Equipment

4.1.1.1 2609

• Subrack

A subrack is the supporting body of boards and the equipment. Indicators are installed on the top cover to indicate the power supply status of the switch and the working state of interfaces. Each fast Ethernet port has one indicator. The PWR indicator indicates the power supply status, the RUN indicator indicates the working state of the switch, and the other indicators (LNK/ACT) indicate the link status of the corresponding port. Ошибка! Источник ссылки не найден. shows the outer view of a subrack.

Figure 2 Outer View of Sub-rack of the ZXR10 2609

• Front panel

Ошибка! Источник ссылки не найден. shows the structure of a front panel, which consists of one Console port, nine 10/100M electrical ports, and one power socket.

Figure 3 Front Panel of the ZXR10 2609

• Back panel

The back panel only provides ports for system grounding, as shown in Ошибка! Источник ссылки не найден..



Figure 4 Back Panel of the ZXR10 2609

l

4.1.1.2 2609-FU

• Subrack

A subrack is the supporting body of boards and the equipment. Indicators are installed on the top cover to indicate the power supply status of the switch and the working state of interfaces. Each fast Ethernet port has one indicator. The PWR indicator indicates the power supply status, the RUN indicator indicates the working state of the switch, and the other indicators (LNK/ACT) indicate the link status of the corresponding port. Ошибка! Источник ссылки не найден. shows the outer view of a subrack.

Figure 5 Outer View of Sub-rack of the ZXR10 2609-FU

• Front panel

Ошибка! Источник ссылки не найден. shows the structure of a front panel, which consists of one Console port, eight 10/100M electrical ports, one FE optical ports and one power socket.

Figure 6 Front Panel of the ZXR10 2609-FU

• Back panel

The back panel only provides ports for system grounding, as shown in Ошибка! Источник ссылки не найден..

Figure 7 Back Panel of the ZXR10 2609-FU



4.1.2 Console Port

The Console port is connected to the Com port of a computer for the initial configuration management of the switch.

4.1.3 FE Port

ZXR10 2609 provides nine 10/100M fast Ethernet ports, 2609-FU provides eight 10/100 M fast Ethernet ports and a fixed 100M optical port (multiple mode 2KM, single mode 15KM, and single mode 40KM can be selected). All ports support automatic MDI/MDI-X operations. Switches can be connected to PCs, servers, hubs or other switches with straight-through or crossover cables.

Table 1 Maximum Cable Length

Cable Type Maximum Cable Length

Category 3, 4, and 5 twisted pair cables

100 m

Each port supports IEEE802.3x self-adaptation. Therefore, the most suitable communication mode (half duplex or full duplex) and data rate (10 Mbps or 100 Mbps) can be selected automatically. (The connected equipment must also support this feature.) If the equipment connected to these ports does not support self-adaptation, the ports will adopt the peer rate, but the default communication mode will be half duplex. The rate control is subject to a granularity of 64 K. The ingress can be configured with any of the following policies: all frame restricted, multicast frame and flooded unicast frame restricted, multicast frame (including broadcast) restricted, and broadcast frame restricted.

Each port of the 2609, 2609-FU has a LNK/ACT indicator. If the indicator is on, the link is activated. If the indicator blinks, data transfer is going on.

4.1.4 Cabling

The ZXR10 2600 series switches all adopts the front cabling for the convenience of engineering implementation and clear cable routing.

4.2 Hardware Architecture

4.2.1 Overall Architecture

Ошибка! Источник ссылки не найден. shows the hardware architecture of an access switch with fixed ports.



Figure 8 ZXR10 2600 Hardware Architecture with Fixed Ports

SDRAM

FLASH

CPU

CONSOLE

Switching network

controller

PHY

Integrated PHY

The system hardware consists of the following parts:

• 10/100M PHY: used for data coding. 1-port chip is used on the 10/100M PHY.

• Switching network controller: Adopts the high performance ASIC chip technology to provide the wire speed layer 2 forwarding of data packets.

• CPU: A cost-effective CPU to control the whole system.

As shown in the figures above, switching system of the ZXR10 series adopts the bus structure. The port capacity of 2609 and 2609-FU is 1.8 G and the bus bandwidth is 6.4G.

4.3 System Software

4.3.1 Overview

Ошибка! Источник ссылки не найден. shows the software architecture of the ZXR10 2600 series switches.

Figure 9 Software Architecture

BSPEmbedded OSSwitch driving

Protocol interface

encapsulation layer

Configurationmanage

ment interface layer

VLAN SNMP TFTP ConsoleTelnet802 . 1x IGMP

GVRP STP MSTP RSTP

As shown in Figure 9, the software architecture adopts the bottom-up hierarchical design. By operation, the software architecture is divided into a service plane and a management plane. The service plane forwards service data, including necessary



protocol process and data driving. The data forwarding is automatically completed. The management plane processes data configuration and notifies the current operation status. The configuration is basically completed under an interactive environment.

ZX10R 2600 series provide the layer 2 switching function, VLAN management function, IGMP Snooping function, and QoS policy. The system has reserved interfaces for the convenience of future development.

4.3.2 Data Processing Procedure

4.3.2.1 Data Exchange Process

For a switch, data exchange actually means forwarding data from port to port. After receiving a data frame, the switch sends it to the proper port according to the destination MAC address in the frame header.

The switch completely depends on an important internal data structure CAM table (namely, the MAC address table) to select ports according to the destination MAC address. The CAM table contains information of MAC address and port identification (such as port ID) at least. When a packet reaches a port, the switch will check the destination MAC address in the address table and display the destination address of the port. If the destination address is an inbound port, the packet will be discarded or filtered because it is addressed to the local lot. If the destination address is another port, the packet will be forwarded to the port and queued until it is output. If the destination address is not in the address table, the data frame will be sent to all ports other than the source port. If the source address of the packet is not found in the address table, the source address and the inbound port ID will be recorded to determine the subsequent forwarding.

A layer 2 Ethernet switch exchanges data in the following three steps:

• Address learning: The switch receives a data frame at one port and checks the CAM table according to the source MAC address of the data frame. If the MAC does not exist in the CAM table, the switch will add related information (including the source port ID) of the MAC to the CAM table. In this way, address learning is completed.

• Forwarding decision: After address learning, the switch will search the CAM table according to the destination MAC address of the data frame. If the MAC is found, the switch will send the data frame to the send queue of the corresponding port according to the search result (including the source port identification). If the MAC is not in the address table, the switch will send the data frame to all ports other than the source port. This process is called flooding.

• Data forwarding: After making the forwarding decision, the switch will forward the data frame by means of the hardware.



4.3.2.2 Flow Direction of VLAN Data Packet

In consideration of the network security and convenient management, the VLAN technology is adopted in the current network deployment. The following describes the flow direction of data packets in the VLAN. The VLAN processing procedure is as follows:

• Data frame inbound: The switch classifies inbound data frames according to their VLAN identification (VID): data frames without VID into one category and those with the same VID into another category. The switch forwards or discards a data packet according to the VID. Meanwhile, the switch can assign a VID to a frame without any labeling or a frame labeled as priority.

• VLAN tag: If a data frame has no VID, the switch will assign a VID to it and insert it into the frame header. This process is called “Label VLAN”. The switch handles packet forwarding and fills the VLAN of the data frame or the identification field of the priority information through this process. The administrator can set the priority to select the type of VLAN and the VID. The default setting of the switch includes the IP subnet information, the network protocol, the MAC address, and the inbound port of the data frame.

• Filtering: The process verifies whether the destination address and the source address are in the same VLAN.

• Forwarding: The switch either forwards a data frame or discards it according to the information of the VLAN database.

• Learning: The switch checks the source address of the data frame and VLAN classification information and records them in the forwarding database.

The port mode of ZXR10 2600 series is divided into access mode and trunk mode. The port mode determines the data output form, namely, whether the VLAN data packet is output directly or output with the Tag removed after the switch makes a forwarding decision.

As far as the encapsulation of data packets is concerned, ZXR10 2600 series are the same as most Ethernet switches. That is, when an untagged data packet reaches a port, the switch encapsulates a tag for the packet according to the PVID of the port and then determines the VID according to the tag. Finally the switch searches the destination site of the data packet in the same VLAN. If the destination MAC address is found, the data packet will reach the destination. If the destination MAC address is not determined or found, the data packet will be broadcast in the same VLAN or directly discarded.



5 Technical Specifications

Table 2 The ZXR10 2600 series switches technical specifications

Item Description

2609 2609-FU

Port Fixed Port

One Console port, eight 10/100M downlink ports, and one 10/100M uplink port

One console port, eight 10/100M downlink ports, and one 10/100M optical uplink port

Optional Extended Port None

Transmission

Basic Performance

Mac Table 8K

VLAN 4K

Switching Capacity 6.4G

Packet Forwarding Rate

1.34M

Enhanced Performance

Trunk (16 groups/eight ports), MSTP (16 instances), port rate limit (64 K), IGMP (256 items), QoS (4 priority levels), 802.1x (64 users), static MAC (1 K)

Power Supply Power Supply

AC: 220 VAC (100 VAC to 240 VAC, 50 Hz to 60 Hz) or -48 VDC DC: -57V~-40V

Power Consumption 10W 10W

Physical Parameters

Dimensions (wide × high × deep) 35mm × 216mm × 130mm

Weight About 1Kg

Environmental Requirements

Working temperature -5°C~45°C

Storage temperature -40℃~+70℃

Relative humidity

5% to 95%, no dew, avoid direct sunlight and keep the equipment away from any heat source or areas with strong electromagnetic inference.

Earthquake-proof Richter 8 scale earthquake



6 Networking

6.1 Workgroup Networking Mode

ZXR10 2609/2818S/2826S/2852S is employed in workgroup-level networks like enterprise and department networks. ZXR10 2609/2818S/2826S/2852S provides 8 to 48 10/100M interfaces. Number of interfaces can be extended through cascading of switches. Extension slot can provide 100M or 1000M high-speed optical interfaces to connect with backbone network or high-speed server. Networking structure is shown in Ошибка! Источник ссылки не найден..

Figure 10 Typical Workgroup Networking Structure

IP backbone network 100M/1000M

10/100MServer

ZXR10 2609/2818S/2826S/2852S

10/100M

10/100M

10/100M10/100M10/100M

10/100M

10/100MZXR10 2609/2818S/2826S/2852S

6.2 MAN Broadband Access Networking Mode

In construction of broadband MAN, ZXR10 2609/2818S/2826S/2852S can be equipped at access layer of residential blocks or convergence layer of buildings. It can directly provide 10/100M access of subscribers. It connects to switch at access layer for example ZXR10 1816. With flexible uplink port of ZXR10 2609/2818S/2826S/2852S, 100M/1000M optical interface can be configured to connect to convergence node of residential blocks. It builds a broadband service network for an information residential block along with network management systems such as Broadband Access Server (BRAS), and (authentication, authorization and accounting) AAA server.

Customer Premises Network equipment can be included via in-band or out-band mode into the NMS of the entire MAN. It can also be managed with the network management and service management system established in the residential complex. Networking structure can be seen in Ошибка! Источник ссылки не найден..



Figure 11 TYPICAL NETWORKING OF MAN BROADBAND ACCESS

IP backbonenetwork

100M/1000M

Email/DNS/DHCP server

AAA server

100M

1000M ZXR10 2852S/2826S

ZXR10 3906

BRAS

100M10/100M 10/100M

N× 10/100M

ZXR10 2826SZXR10 2609 ZXR10 2818S

Network/Propertymanagement server



7 Acronyms and Abbreviations

Table 3 Acronyms and Abbreviations

Terminology Explanations

10Base-TX 10Mbps Ethernet, standard for category 3, 4, and 5 twisted pair cable in IEEE specifications

100Base-TX 100Mbps fast Ethernet, standard for category 5 twisted pair cable or above in IEEE specifications

Adaptive In relation to speed, duplex and flow control port, refers to a feature of automatic configuration to the most proper mode.

Backbone A high-speed network, for connecting multiple low-speed networks

Bandwidth Amount of information that can be transmitted over a channel. For example, the bandwidth of Fast Ethernet is 100 Mbps.

Baud rate A term of signaling rate, designed as frequencies of status change of electrical or optical transmission medium

Bridge A device at layer 2 in the 7-layer OSI mode, which can connect LANs or network segments that use the same protocol and provide the functions of auto learning of network address and network configuration

Broadcast A data packet is sent to all devices on a network.

Broadcast storm

Broadcast frame or multicast frame is forwarded endlessly on a bridge due to the bridge.

CSMA/CD Abbreviated from Carrier Sense Multiple Access/Collision Detect, a protocol for data transmission over Ethernet as specified in IEEE 802.3 standard

CRC Abbreviated from Cyclic Redundancy Check. To ensure integrity of contents of a network frame, CRC is calculated by MAC sending process and detected by MAC receiving process of a site.

Filtering

A capability of many devices (such as bridge, switch and router) of deciding whether to forward the data frame, which is received by a port, to the next port. Such capability can avoid the access of unauthorized users or equipment.

Flow control A congestion control mechanism to avoid loss of data packages and congestion of port when a network device sends data to overloaded port.

Full-duplex A switch sets up a point-to-point connection between nodes on LAN, and allows the nodes to receive and send data packets simultaneously.

Semi-duplex At a time, communication between two nodes is available in only one directly, but not in two directions.

IP Internet Protocol, located in layer 3 in the 7-layer OSI mode, a part of TCP/IP

IP Address A value comprising 32 bits to identify a node by using IP protocol

MAC Media Access Control, a medium-independent function of sending and receiving frames with the CSMA/CD access method as specified by IEEE

MAC Address

Media Access Control address, known as hardware or physical address, comprising six bytes



Terminology Explanations

MDI Medium Dependent Interface, a port of another device connected to an Ethernet port as the receiving end

MDI-X Medium Dependent Interface Cross-over

Router A device at the network layer, located above the MAC layer where bridge or L2 switch works, makes decision on forwarding and filtering according to the network layer information

SNMP Simple Network Management Protocol, which provides a method to manage, monitor and control TCP/IP network

TCP/IP Transmission Control Protocol/Internet Protocol, the most well-known protocols of network interconnection. It is originally an UNIX standard, and now supports almost all platforms and Internet protocols.

Telnet TCP/IP request protocol provided to virtual terminal equipment, which allows users to log in other computers and access another device.

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