31026528-MA5600 Technical Manual(V3.10)

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Chapter 1 System Overview 1-1...........................................................................

1.1 Preface 1-1...................................................................................................

1.2 Benefits and Features 1-2............................................................................

1.2.1 Large Capacity and High Integration 1-2.............................................1.2.2 Powerful Multicast Services 1-3...........................................................1.2.3 Smart Triple Play Solutions 1-3............................................................1.2.4 Superb Service Wholesale Solutions 1-4.............................................1.2.5 Abundant Ports 1-4..............................................................................1.2.6 Guaranteed QoS 1-5............................................................................1.2.7 Comprehensive User Management 1-5...............................................1.2.8 Flexible Networking 1-6........................................................................1.2.9 Carrier-Class Reliability 1-6.................................................................

1.2.10 Strict Security 1-6...............................................................................1.2.11 Superior Maintainability and Manageability 1-7.................................

1.3 External Ports 1-8.........................................................................................

1.3.1 Subscriber Ports 1-8............................................................................1.3.2 Network Ports 1-9................................................................................1.3.3 Management Ports 1-9.........................................................................1.3.4 Test Ports 1-10.......................................................................................

Chapter 2 System Architecture 2-1......................................................................

2.1 Functional Architecture 2-1...........................................................................2.1.1 Main Control Module 2-1......................................................................2.1.2 ADSL2+ Module 2-2.............................................................................2.1.3 SHDSL Module 2-2..............................................................................2.1.4 Ethernet Module 2-2.............................................................................2.1.5 ISU Module 2-2....................................................................................2.1.6 Environment Monitor Module 2-3.........................................................

2.2 Hardware Architecture 2-3............................................................................

2.2.1 Cabinet 2-3...........................................................................................2.2.2 MA5600 Frame 2-6..............................................................................2.2.3 Boards, Subboards and Ports 2-8........................................................

2.3 Software Architecture 2-10.............................................................................

Chapter 3 Service Functions 3-1..........................................................................

3.1 Broadband Access Services 3-1..................................................................

3.1.1 ADSL2+ Service 3-1............................................................................3.1.2 SHDSL Service 3-3..............................................................................3.1.3 LAN Service 3-4...................................................................................

3.2 VLAN Services 3-4.......................................................................................

3.2.1 Standard VLAN 3-4..............................................................................


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3.2.2 MUX VLAN 3-5.....................................................................................3.2.3 Smart VLAN 3-5...................................................................................3.2.4 Super VLAN 3-5...................................................................................3.2.5 QinQ VLAN 3-6....................................................................................3.2.6 VLAN Stacking 3-6...............................................................................

3.3 Multicast Services 3-7..................................................................................3.3.1 IGMP Proxy 3-7....................................................................................3.3.2 Managed Multicast 3-8.........................................................................

3.4 MAC Address Management 3-8...................................................................3.5 Built-in ISU 3-9.............................................................................................3.6 Routing Management 3-9.............................................................................3.7 ARP and ARP Proxy 3-11..............................................................................3.8 STP/RSTP 3-12..............................................................................................3.9 QoS 3-13........................................................................................................

3.9.1 Flow Classification 3-13.........................................................................3.9.2 DiffServ Service 3-13.............................................................................3.9.3 Traffic Policing and Port Rate Limit 3-13................................................3.9.4 Queue Scheduling 3-14.........................................................................

3.10 Terminal Management 3-15.........................................................................3.11 Environment Monitoring 3-16.......................................................................

Chapter 4 Networking Applications 4-1...............................................................

4.1 System Networking 4-1................................................................................4.1.1 IP-DSLAM Application 4-1...................................................................4.1.2 Built-in ISU Application 4-2..................................................................4.1.3 Subtending Application 4-4..................................................................

4.2 Typical Applications 4-5................................................................................4.2.1 QinQ Application 4-5............................................................................4.2.2 VLAN Stacking Application 4-6............................................................4.2.3 Triple Play Application 4-7...................................................................

4.2.4 Residential Community Application 4-9...............................................4.2.5 IP Hotel Application 4-10........................................................................

Chapter 5 Management and Maintenance 5-1.....................................................

5.1 System Maintenance 5-1..............................................................................5.2 CLI Mode 5-2................................................................................................

5.2.1 Running Environment 5-2....................................................................5.2.2 Characteristics 5-2...............................................................................5.2.3 Networking 5-3.....................................................................................

5.3 NMS Mode 5-3.............................................................................................5.3.1 Running Environment 5-3....................................................................


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5.3.2 Characteristics 5-4...............................................................................5.3.3 Networking 5-5.....................................................................................

Chapter 6 Technical Specifications 6-1...............................................................

6.1 Physical Specifications 6-1...........................................................................6.1.1 Device Dimensions 6-1........................................................................6.1.2 Device Weight 6-1................................................................................6.1.3 Power Specifications 6-2......................................................................6.1.4 Environment Conditions 6-2.................................................................6.1.5 Power Consumption 6-2.......................................................................

6.2 Performance Specifications 6-3....................................................................6.2.1 System Performance 6-3.....................................................................6.2.2 System Configurations 6-3...................................................................

6.2.3 Reliability indexes 6-4..........................................................................6.2.4 Service Characteristics 6-4..................................................................

6.3 Port Specifications 6-11..................................................................................6.3.1 Console Port 6-11..................................................................................6.3.2 ADSL2+ Port 6-11..................................................................................6.3.3 SHDSL Port 6-12...................................................................................6.3.4 FE Electrical Port 6-12...........................................................................6.3.5 FE Single-Mode Optical Port 6-12.........................................................6.3.6 FE Multi-mode Optical Port 6-13............................................................6.3.7 GE Single-mode Optical Port 6-14.........................................................6.3.8 GE Multi-mode Optical Port 6-14...........................................................6.3.9 GE Electrical Port 6-15...........................................................................

6.4 Standards Compliance 6-15...........................................................................

Appendix A Introduction to xDSL Technology A-1.............................................

A.1 Overview A-1................................................................................................A.1.1 Introduction to xDSL Technologies A-1................................................A.1.2 Specifications of xDSL Technologies A-3............................................

A.2 ADSL2+ A-4.................................................................................................A.3 SHDSL A-9...................................................................................................

Appendix B Environment Requirements B-1.......................................................

B.1 Storage Requirements B-1...........................................................................B.2 Transportation Requirements B-3................................................................B.3 Running Environment Requirements B-5.....................................................

Appendix C Acronyms and Abbreviations C-1....................................................

Index .................................................................................................................


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Huawei Technologies Proprietary

HUAWEI

SmartAX MA5600 Multi-service Access Module

Technical Manual

V300R001


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SmartAX MA5600 Multi-service Access Module

Technical Manual

Manual Version T2-050228-20050203-C-3.10

Product Version V300R001

BOM 31026528

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.

Addr es s: Administration Building, Huawei Technologies Co., Ltd.,

Bantian, Longgang District, Shenzhen, P. R. China

Postal Code: 518129

Website: http://www.huawei.com

Email: [email protected]


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Copyright 2005 Huawei Technologies Co., Ltd.

All Rights Reserved

No part of this manual may be reproduced or transmitted in any form or by any

means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks

, HUAWEI, C&C08, EAST8000, HONET, , ViewPoint, INtess, ETS, DMC,

TELLIN, InfoLink, Netkey, Quidway, SYNLOCK, Radium, M900/M1800,TELESIGHT, Quidview, Musa, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN,

HUAWEI OptiX, C&C08 iNET, NETENGINE, OptiX, iSite, U-SYS, iMUSE, OpenEye,

Lansway, SmartAX, infoX, and TopEng are trademarks of Huawei Technologies

Co., Ltd.

All other trademarks and trade names mentioned in this manual are the property of

their respective holders.

Notice

The information in this manual is subject to change without notice. Every effort has

been made in the preparation of this manual to ensure accuracy of the contents, but

all statements, information, and recommendations in this manual do not constitute

the warranty of any kind, express or implied.


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About This Manual

Release Notes

The current version of this manual applies to the SmartAX MA5600 Multi-service

Access Module V300R001.

Related Manuals

The following manuals provide information about the MA5600.

Manual Content

SmartAX MA5600Multi-service Access ModuleTechnical Manual

It provides an overall introduction to the MA5600,including the major functions, system structure,service implementation, management &maintenance, networking & applications.

SmartAX MA5600 Multi-service Access Module OperationManual

It is used for assisting the users in generaloperations, data configurations and typicalapplications of the MA5600.

SmartAX MA5600 Multi-service Access Module Command Help

It introduces all commands available in theMA5600, as well as the command usage andexamples. It is only available in electronic form.

SmartAX MA5600 Multi-service Access Module InstallationManual

It provides information on the system installationof the MA5600.

Documentation CD ROM It contains the package of documentation.

Organization

The manual assists the users in understanding, operating and maintaining the MA5600.

There are seven parts in this manual, including:

Chapter 1 System Overview profiles the features of the MA5600, and introduces the

external interfaces of the MA5600.

Chapter 2 System Architecture introduces the hardware architecture of the MA5600,

including its boards, power supply and heat dissipation system. This chapter also briefs

the software architecture of the MA5600.


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Chapter 3 Service Functions elaborates on VDSL&ADSL service characteristics as

well as other software characteristics of the MA5600.

Chapter 4 Networking Applications introduces various networking applications of

the MA5600.

Chapter 5 Management and Maintenance deals with the CLI-based and

SNMP-based network management systems of the MA5600.

Chapter 6 Technical Specifications gives technical specifications about the MA5600.

Appendix gives environment requirements of the MA5600, as well as a list of

abbreviations and acronyms that appear in this manual.

Intended Audience

The manual is intended for the following readers:

Network administrators

Network engineers

Conventions

The manual uses the following conventions:

I. General conventions

Convention Description

Arial Normal paragraphs are in Arial.

Boldface Headings are in Boldface .

II. Symbols

Eye-catching symbols are also used in the manual to highlight the points worthy ofspecial attention during the operation. They are defined as follows:

Caution : Means reader be extremely careful during the operation.

Note : Means a complementary description.


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Technical ManualSmartAX MA5600 Multi-service Access Module Table of Contents


i

Table of Contents

Chapter 1 System Overview......................................................................................................... 1-1

1.1 Preface............................................................................................................................... 1-1

1.2 Benefits and Features........................................................................................................ 1-2

1.2.1 Large Capacity and High Integration ...................................................................... 1-2

1.2.2 Powerful Multicast Services .................................................................................... 1-3

1.2.3 Smart Triple Play Solutions..................................................................................... 1-3

1.2.4 Superb Service Wholesale Solutions...................................................................... 1-4

1.2.5 Abundant Ports........................................................................................................ 1-4

1.2.6 Guaranteed QoS..................................................................................................... 1-5 1.2.7 Comprehensive User Management ........................................................................ 1-5

1.2.8 Flexible Networking................................................................................................. 1-6

1.2.9 Carrier-Class Reliability........................................................................................... 1-6

1.2.10 Strict Security ........................................................................................................ 1-6

1.2.11 Superior Maintainability and Manageability .......................................................... 1-7

1.3 External Ports .................................................................................................................... 1-8

1.3.1 Subscriber Ports...................................................................................................... 1-8

1.3.2 Network Ports.......................................................................................................... 1-9

1.3.3 Management Ports.................................................................................................. 1-9

1.3.4 Test Ports .............................................................................................................. 1-10

Chapter 2 System Architecture.................................................................................................... 2-1

2.1 Functional Architecture...................................................................................................... 2-1

2.1.1 Main Control Module............................................................................................... 2-1

2.1.2 ADSL2+ Module...................................................................................................... 2-2

2.1.3 SHDSL Module........................................................................................................ 2-2

2.1.4 Ethernet Module...................................................................................................... 2-2

2.1.5 ISU Module.............................................................................................................. 2-2

2.1.6 Environment Monitor Module .................................................................................. 2-3

2.2 Hardware Architecture....................................................................................................... 2-3

2.2.1 Cabinet.................................................................................................................... 2-3

2.2.2 MA5600 Frame........................................................................................................ 2-6

2.2.3 Boards, Subboards and Ports................................................................................. 2-8

2.3 Software Architecture ...................................................................................................... 2-10

Chapter 3 Service Functions........................................................................................................ 3-1

3.1 Broadband Access Services.............................................................................................. 3-1

3.1.1 ADSL2+ Service...................................................................................................... 3-1

3.1.2 SHDSL Service ....................................................................................................... 3-3


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ii

3.1.3 LAN Service ............................................................................................................ 3-4

3.2 VLAN Services................................................................................................................... 3-4

3.2.1 Standard VLAN ....................................................................................................... 3-4

3.2.2 MUX VLAN.............................................................................................................. 3-5

3.2.3 Smart VLAN ............................................................................................................ 3-5

3.2.4 Super VLAN ............................................................................................................ 3-5

3.2.5 QinQ VLAN.............................................................................................................. 3-6

3.2.6 VLAN Stacking ........................................................................................................ 3-6

3.3 Multicast Services.............................................................................................................. 3-7

3.3.1 IGMP Proxy............................................................................................................. 3-7

3.3.2 Managed Multicast .................................................................................................. 3-8

3.4 MAC Address Management............................................................................................... 3-8

3.5 Built-in ISU ......................................................................................................................... 3-9

3.6 Routing Management ........................................................................................................ 3-9 3.7 ARP and ARP Proxy........................................................................................................ 3-11

3.8 STP/RSTP ....................................................................................................................... 3-12

3.9 QoS.................................................................................................................................. 3-13

3.9.1 Flow Classification................................................................................................. 3-13

3.9.2 DiffServ Service..................................................................................................... 3-13

3.9.3 Traffic Policing and Port Rate Limit....................................................................... 3-13

3.9.4 Queue Scheduling................................................................................................. 3-14

3.10 Terminal Management................................................................................................... 3-15

3.11 Environment Monitoring................................................................................................. 3-16

Chapter 4 Networking Applications............................................................................................. 4-1

4.1 System Networking............................................................................................................ 4-1

4.1.1 IP-DSLAM Application............................................................................................. 4-1

4.1.2 Built-in ISU Application............................................................................................ 4-2

4.1.3 Subtending Application ........................................................................................... 4-4

4.2 Typical Applications ........................................................................................................... 4-5

4.2.1 QinQ Application ..................................................................................................... 4-5

4.2.2 VLAN Stacking Application ..................................................................................... 4-6

4.2.3 Triple Play Application............................................................................................. 4-7

4.2.4 Residential Community Application......................................................................... 4-9

4.2.5 IP Hotel Application............................................................................................... 4-10

Chapter 5 Management and Maintenance .................................................................................. 5-1

5.1 System Maintenance ......................................................................................................... 5-1

5.2 CLI Mode ........................................................................................................................... 5-2

5.2.1 Running Environment.............................................................................................. 5-2

5.2.2 Characteristics......................................................................................................... 5-2

5.2.3 Networking .............................................................................................................. 5-3

5.3 NMS Mode......................................................................................................................... 5-3


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iii

5.3.1 Running Environment.............................................................................................. 5-3

5.3.2 Characteristics......................................................................................................... 5-4

5.3.3 Networking .............................................................................................................. 5-5

Chapter 6 Technical Specifications............................................................................................. 6-1 6.1 Physical Specifications ...................................................................................................... 6-1

6.1.1 Device Dimensions ................................................................................................. 6-1

6.1.2 Device Weight ......................................................................................................... 6-1

6.1.3 Power Specifications............................................................................................... 6-2

6.1.4 Environment Conditions.......................................................................................... 6-2

6.1.5 Power Consumption................................................................................................ 6-2

6.2 Performance Specifications............................................................................................... 6-3

6.2.1 System Performance............................................................................................... 6-3

6.2.2 System Configurations ............................................................................................ 6-3

6.2.3 Reliability indexes.................................................................................................... 6-4

6.2.4 Service Characteristics ........................................................................................... 6-4

6.3 Port Specifications........................................................................................................... 6-11

6.3.1 Console Port.......................................................................................................... 6-11

6.3.2 ADSL2+ Port ......................................................................................................... 6-11

6.3.3 SHDSL Port........................................................................................................... 6-12

6.3.4 FE Electrical Port................................................................................................... 6-12

6.3.5 FE Single-Mode Optical Port................................................................................. 6-12

6.3.6 FE Multi-mode Optical Port ................................................................................... 6-13

6.3.7 GE Single-mode Optical Port................................................................................ 6-14 6.3.8 GE Multi-mode Optical Port .................................................................................. 6-14

6.3.9 GE Electrical Port .................................................................................................. 6-15

6.4 Standards Compliance .................................................................................................... 6-15

Appendix A Introduction to xDSL Technology ..........................................................................A-1

A.1 Overview............................................................................................................................A-1

A.1.1 Introduction to xDSL Technologies.........................................................................A-1

A.1.2 Specifications of xDSL Technologies .....................................................................A-3

A.2 ADSL2+.............................................................................................................................A-4

A.3 SHDSL...............................................................................................................................A-9

Appendix B Environment Requirements ....................................................................................B-1

B.1 Storage Requirements ......................................................................................................B-1

B.2 Transportation Requirements............................................................................................B-3

B.3 Running Environment Requirements ................................................................................B-5

Appendix C Acronyms and Abbreviations .................................................................................C-1

Index ................................................................................................................................................ i-1


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Technical ManualSmartAX MA5600 Multi-service Access Module Chapter 1 System Overview


1-1

Chapter 1 System Overview

1.1 Preface

As the demand for telecom services keeps growing, provisioning of integrated data,

video, voice and multimedia services that feature large capacity, high data rate, great

bandwidth and good quality has become a new direction in access network

development. In light of global users requirements, Huawei has launched its SmartAX

MA5600 Multi-service Access Module.

The MA5600 employs non-blocking gigabit switching fabric (1 Gbit/s per line board),

facilitating rich access means such as:

Asymmetric Digital Subscriber Line 2 Plus (ADSL2+)

Single-line High Speed Digital Subscriber Line (SHDSL)

Ethernet

The MA5600 features high density of subscriber ports, diverse interfaces and flexible

networking modes. For residential users, it supports services such as web surfing,

Internet gaming and video on demand (VOD). For commercial users, it supports a

variety of services with guaranteed quality of service (QoS), such as video

conferencing, enterprise Intranet, virtual private network (VPN), and packetized voice

transmission.

Moreover, the MA5600 supports the following functions to ease the operators effort to

build up, operate and maintain a broadband access network:

Intelligent Service Unit (ISU)

Centralized terminal management

Broadband test

Figure 1-1 shows the networking of the MA5600 under centralized management of the

Huawei iManager N2000 network management system (iManager N2000).


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1-2

BRAS IP network

iManager N2000 ADSL2+/FE/SHDSL FE/GE

FE/GEFE/GEFE/GE

MA5600 MA5600 MA5600

MA5600

ADSL2+ /SHDSL/FE ADSL2+/SHDSL/FE ADSL2+ /SHDSL/FE

Figure 1-1 Networking of the MA5600

1.2 Benefits and Features

The MA5600 provides rich services and management methods, including:

DSLAM access services

Multicast services

Triple play services

Private line services

With its strict guarantee of QoS and powerful access control list (ACL) functions, the

MA5600 offers diverse, operable and manageable broadband access services.

1.2.1 Large Capacity and High Integration

The MA5600 integrates data switching, routing and user management. This helps to

enhance the system integration.

In addition, to satisfy medium and large capacity requirements, the MA5600:

Adopts large capacity backplane with non-blocking GE bus.

The backplane capacity is 210 Gbit/s.

The packet forwarding rate is 72 Mpps.

The switching fabric of main control board (SCU) is 48 Gbit/s.


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1-3

Supports high-density line boards, such as 64-port ADSL2+ board and 32-port

SHDSL board.

Each frame provides 896 ADSL2+ lines or 448 SHDSL lines.

Each cabinet houses three frames, providing 2688 ADSL2+ lines or 1344 SHDSLline.

1.2.2 Powerful Multicast Services

The MA5600 is able to support carrier-class multicast service operation. The MA5600

supports multicast protocols and managed multicast, assisting carriers in provisioning

and managing value-added broadband multicast services.

To be more specific, the MA5600 supports:

Internet Group Management Protocol (IGMP) Proxy multicast and profile-basedmanaged multicast with up to 1000 multicast groups

Rich authentication modes for different multicast operations

Single-PVC and multi-PVC multicast

Video traffic received from multiple uplink ports

Channel preview with configurable preview times in one day

Viewership statistics

IGMP pre-join, fast-leave as well as IGMP high performance processing for

broadband TV (BTV) over xDSL

With the managed multicast function, the MA5600 can control the multicast group that

a user can join. Working with the operation support system (OSS) through the TL1

interface on the network management system (NMS), the MA5600 offers a solution to

user authority control for the multicast service providers.

1.2.3 Smart Triple Play Solutions

The MA5600 supports smart triple play solutions to provide Voice over IP (VoIP),

Internet access and BTV. A built-in ISU or an external broadband remote access server

(BRAS) can be used to manage these services.

Built-in ISU

In the MA5600, the built-in ISU is a service board plugged in the frame. The ISU

functions as the service gateway for triple play.

External BRAS

With an external BRAS, triple play users are accessed to the MA5600 through the

Home Gateway. The MA5600 then connects these users to the upstream BRAS

transparently for unified management.


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1-4

1.2.4 Superb Service Wholesale Solutions

The MA5600 can coordinate with the ISU to provide service wholesale in various

modes. Major access modes of service wholesale include: Layer 2 Tunneling Protocol (L2TP) mode

In this mode, the ISU functions as the L2TP access concentrator (LAC). The

MA5600 accesses the wholesale users, and identifies these users by VLAN IDs.

The ISU will then connect the users to various Internet service providers (ISPs)

based on their domain names.

Generic Routing Encapsulation (GRE) mode

In this mode, the ISU terminates the users and accesses them to different ISPs

through GRE tunnels based on their domain names.

802.1q in 802.1q (QinQ) mode

In this mode, when receiving packets with private VLAN tag from the lower layer,

the MA5600 adds public network VLAN tags to these packets, and then sends

them to the corresponding ISPs.

1.2.5 Abundant Ports

The MA5600 can offer various network ports, service ports, maintenance ports and test

ports to adapt to different network applications. The ports provided by the MA5600 are

open to and compatible with industry standards.

See Table 1-1.

Table 1-1 Ports provided by the MA5600

Type Port Remarks

FE optical/electricalport

Network portGE optical/electricalport

Both the GE and FE optical ports adopt theSFP optical module. The SFP module canbe a single-mode module or a multi-modemodule, depending on the required reaches.

Service port ADSL2+

Fully compatible with ADSL, with addedadvantages of:

Higher data rate

Longer signal reach

Lower power consumption

More stable operation

Support of single and dual ended looptest


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1-5

Type Port Remarks

SHDSL

It adopts symmetric data transmission. Ittransmits at 192 kbit/s 2312 kbit/s in boththe upstream and the downstream over areach of 30006000 m.

Ethernet It allows data burst and is delay insensitive.It transmits at 100 Mbit/s.

Serial port

Ethernetmaintenance port

The ports are used for local and remotemaintenance.

Maintenanceport

Environment monitorport

Environment parameters collected by themonitoring device are reported to the hostthrough this port.

Test port Line test portIt is open and standardized, enablingconnection with external test devices tocarry out xDSL line tests.

1.2.6 Guaranteed QoS

The MA5600 offers customized QoS based on different services and user requirements.

The MA5600 supports:

Traffic rule-based packet filtering, packet redirection, flow mirroring, trafficstatistics, traffic policing, queue scheduling on a port, rate limit on a port, priority

strategies, and VLAN change strategies.

802.1p-based class of service (CoS) and traffic prioritization. 802.1p is used by

default.

Various queue scheduling algorithms, such as strict priority (SP) and weighted

round robin (WRR).

1.2.7 Comprehensive User Management

The MA5600 supports the following user management means:

Remote Authentication Dial In User Service (RADIUS) accounting

User management based on port and MAC address

Multicast authority control on the users

Management of address resolution and routing

Policy Information Transfer Protocol (PITP)

With PITP, the MA5600 carries the location information of a user port in the PPPoE

authentication request sent to the BRAS. In this way, the MA5600 enables binding


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1-6

between the user account and the user port, which is helpful for identifying the

broadband service users.

User management functions facilitated by the ISU

With the ISU board, the MA5600 supports L2TP and authentication based onPPPoE, PPPoA, VLAN binding, and VLAN+Web (forced portal and embedded

portal). It also supports accounting based on traffic volume or online duration,

offering a bypass access solution for commercial users.

PPPoA-to-PPPoE conversion

IPoA-to-IPoE conversion

Dynamic Host Configuration Protocol (DHCP) Relay

DHCP Option60

ARP Proxy

Layer 3 forwarding, facilitating both static routing and dynamic routing (such asRIP based and OSPF based routing)

1.2.8 Flexible Networking

The MA5600 supports various networking modes to cater for the service requirements

of various locations and applications. It supports the following networking modes :

xDSL-based IP DSLAM networking

Subtending networking through Ethernet ports

Triple play networking with unified user management functions

QinQ and VLAN stacking networking, allowing private line interconnection service

and VLAN extension

1.2.9 Carrier-Class Reliability

To ensure operation security, the MA5600 adopts carrier-class reliability design in that:

All boards are hot-swappable.

The SCU supports active/standby switchover.

The ADSL2+ port supports N+1 backup.

The upstream links can be backed up to enhance the system reliability. The system is self-healing, offering more than 150,000 hours of mean time

between failures (MTBF).

The system offers diverse alarm information, and adopts lightning proof and

anti-interference design.

1.2.10 Strict Security

The MA5600 provides the following functions to ensure network security:

Leveled authority control


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1-7

L2 user isolation and controlled mutual access

Restriction on the number of multicast groups allowed for each port

Restriction on the number of hosts allowed to access each port

Query of port IP address by MAC address

Binding between the MAC address and port

Binding between the IP address and port

Protection of DHCP server to enhance DHCP security

DHCP option82, enabling authentication of the type of the customer premises

equipment (CPE)

RADIUS authentication of the management users

Binding between the user account and port

ACL-based access control

1.2.11 Superior Maintainability and Manageability

The MA5600 features excellent management, maintenance, monitoring and test

functions, greatly easing fault locating and routine management.

The MA5600 can be managed on a local or remote terminal, or through the

centralized NMS.

The MA5600 supports network management through the command line interface

(CLI), or inband/outband NMS such as the iManager N2000 based on Simple

Network Management Protocol (SNMP). iManager N2000 NMS provides

graphical user interface (GUI) for centralized management of the MA5600. The MA5600 enables you to manage the remote transmitting units (RTUs) in a

centralized manner. On the MA5600, you can:

Query the RTU information.

Monitor the status of the RTUs.

Configure the RTU data.

Bind the RTUs.

Upgrade the RTU software.

The MA5600 provides complete alarm, test, diagnosis, and tracking functions.

This can greatly ease your daily maintenance and management, boost networkoperation reliability, and ensure network QoS.

The MA5600 provides xDSL line test ports. You can carry out line selection and

fault locating through these ports and the broadband line test system.

The MA5600 collects environment information through its environment monitor

module to facilitate unattended maintenance. The information shows the

temperature and humidity of the machine room, the power supply voltage, and the

smoke alarms.

The MA5600 uses fans for heat dissipation. Each fan has indicators telling the

fans running states. Each fan can be mounted and removed independently.


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1-8

1.3 External Ports

External ports include subscriber ports, network ports, management ports, and test

ports.

1.3.1 Subscriber Ports

The MA5600 provides a variety of subscriber ports, including ADSL2+, SHDSL, and

FE/GE ports.

I. ADSL2+ port

Compliant with ITU-T G.992.3 and G.992.5, the ADSL2+ port provides twisted-pair

based ADSL2+ access in coordination with the ATU-R. (ATU-R is short for ADSLTransmitting Unit-Remote End).

II. SHDSL port

Compliant with ITU-T G.991.2 (Annex A and Annex B), the SHDSL port provides

twisted-pair based SHDSL access in coordination with the STU-R. (STU-R is short for

SHDSL Transmitting Unit-Remote End).

III. FE/GE port

The GE/FE ports of the MA5600 can be used as either subscriber ports or network

ports. When GE/FE ports are used as subscriber ports, the MA5600 can connect with a

LAN switch over optical fiber or Category-5 twisted pairs to provide Ethernet access.

Three types of FE/GE ports are available: FE/GE electrical port, FE/GE single-mode

optical port and FE/GE multi-mode optical port.

The FE/GE electrical port uses an RJ45 connector.

When an electrical port connects with a small capacity L2 switch through

Category-5 twisted pairs, the reach shall be within 100 m.

The FE single-mode/multi-mode optical port uses an LC optical connector.

The port connects with an optical distribution frame (ODF) using the dedicated tail

fiber and then connects to the LAN Switch through optical fibers. The FE

multi-mode port supports a reach of 2 km. The FE single-mode port supports a

reach of 15 km.

The GE single-mode/multi-mode optical port uses an LC optical connector.

The port connects with an ODF using the dedicated tail fiber and then connects to

the LAN Switch through optical fibers. The GE multi-mode port supports a reach of

500 m at low cost. The GE single-mode port supports a reach of 10 km or 40 km.


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1.3.2 Network Ports

The MA5600 provides multiple network ports such as FE and GE ports.

I. FE port

Three kinds of FE ports are available:

FE electrical port

FE single-mode optical port

FE multi-mode optical port

The port cabling is the same as that at the subscriber end. FE ports enable the MA5600

to connect with upstream devices, or with other subtended MA5600 frames.

II. GE port

Three types of GE ports are available:

GE electrical port

GE single-mode optical port

GE multi-mode optical port

GE ports enable the MA5600 to connect with upstream devices, or with other

subtended MA5600 frames.

1.3.3 Management Ports

The MA5600 provides multiple management and maintenance ports. With these ports,

you can maintain the MA5600 locally and remotely in command line interface (CLI)

mode or network management system (NMS) mode.

I. Serial port

The SCU board on the MA5600 provides an RJ-45 serial port (CON) for both local and

remote maintenance. The default baudrate of the serial port is 9600 bit/s.

The port can be used for CLI operations, system commissioning or fault locating. The

cable connecting the serial port and the local maintenance PC has a DB9 connector on

one end, and an RJ45 connector on the other end.

II. Ethernet Maintenance port

The SCU board on the MA5600 provides an RJ-45 Ethernet port (ETH) for both local

and remote maintenance. The port is 10/100M auto-sensing.


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The port can connect with local maintenance PC or remote NMS for program loading,

debugging and other operations.

III. Environment monitor port

The SCU board on the MA5600 provides an RJ-45 environment monitor port (MON) to

connect with the environment monitor module through a special monitoring cable.

It collects various environment parameters sent from the environment monitor module,

including temperature, humidity, power voltage and smoke. Besides, there is also a fan

monitor port on the backplane.

1.3.4 Test Ports

The MA5600 supports line capture function through the external or internal line test bus.

You can use its broadband test ports to interface with an external tester to implement

xDSL line tests.


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Technical ManualSmartAX MA5600 Multi-service Access Module Chapter 2 System Architecture


2-1

Chapter 2 System Architecture

This chapter describes the functional architecture, hardware architecture and software

architecture of the MA5600.

2.1 Functional Architecture

The MA5600 adopts modularized design, in which the functional modules are

independent of each other. All these modules provide standard interfaces, and have

good scalability in terms of system capacity and service types.

The MA5600 consists of multiple functional modules as shown Figure 2-1.

FE/GE

GE GEGE

RS-232Main control module/

Ethernet module

ADSL2+ module SHDSL module ISU module

Figure 2-1 Functional modules of the MA5600

The following sections describe these modules in detail.

2.1.1 Main Control Module

Consisting of the SCU board, subboards and related software, the main controlmodule:

Carries out the control, management and service switching of the MA5600.

Carries out all L2/L3 switch functions supported by Ethernet protocols.

Provides two slots on the front panel to hold the optical or electrical FE/GE

network port subboards.

Provides serial port and Ethernet port for maintenance and management.

Supports switchover between the active and standby SCU board.

Provides an MON port to connect with the environment monitor module.


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2.1.2 ADSL2+ Module

The ADSL2+ module consists of the ADBF board, ADEF board, splitter (SPL) board

and associated software. The SPL board separates voice signals from ADSL2+ signals,and sends ADSL2+ signals to the ADSL2+ board. The ADSL2+ board provides 64

ADSL2+ subscriber lines for accessing the ADSL Transmitting Unit-Remote end

(ATU-R).

2.1.3 SHDSL Module

The SHDSL module consists of the SHEA board and associated software. This module

provides 32 SHDSL subscriber lines for accessing the STU-R through twisted pair lines.

(STU-R stands for SHDSL Transmitting Unit-Remote end.)

The SHDSL solution aims at serving medium and small enterprises and SOHO users.

2.1.4 Ethernet Module

The FE and GE ports on the SCU, apart from serving as uplink ports, can also serve as

service ports to provide Ethernet access. In this case, they are called the Ethernet

module.

The Ethernet module supports the following features:

Multicast service and IGMP Proxy, with up to 1000 multicast groups PPPoA-to-PPPoE conversion

IPoA-to-IPoE conversion

PITP for binding between the user account and port.

Subtending with the main control frame through the FE port or GE port

Layer 3 forwarding that facilitates dynamic routing protocols (such as RIP and

OSPF) and static routing

Enhanced QoS and ACL functions

QinQ, enabling point-to-point private line interconnection between different MANs

VLAN stacking, facilitating VLAN extension and wholesale private line services

2.1.5 ISU Module

Consisting of the ISU board and related software, the ISU serves as a built-in BRAS

that supports user authentication based on PPPoE, VLAN binding, and VLAN+Web

(forced portal and embedded portal). It also supports user accounting on the basis of

the traffic volume or online duration.

The ISU solution aims to offer bypass access for commercial users.

The ISU board mounted to the MA5600 frame can provide FE/GE IP uplink ports.


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2.1.6 Environment Monitor Module

The MA5600 environment monitor module consists of the power monitoring unit, power

distribution monitor unit, and fan monitor unit. These units monitor the ambienttemperature, humidity, smoke, smog, water logging, cabinet door sensor, and power

supply.

The module is connected to the serial port MON on the SCU board. In the event of any

abnormality, the module will issue an alarm to the host.

You can set the upper/lower thresholds of some environment alarms through the CLI or

graphic user interface (GUI) NMS. The module shall decide whether to report alarms

based on the predefined parameters. It can also adjust the fan speed according to the

ambient temperature.

2.2 Hardware Architecture

This section introduces the hardware architecture of the MA5600, including the cabinet,

frames and boards.

2.2.1 Cabinet

The MA5600 can be put into a 19-inch front access H66-18 or H66-22 cabinet.

I. Cabinet appearance

Figure 2-2 shows the front view of the H66 cabinet.

The H66 cabinet has these features:

The H66 cabinet has only front doors, and is only front accessible. It can be

installed against the wall. The dimensions of the H66 cabinet can be:

600 mm x 600 mm x 1800 mm (W x D x H), or

600 mm x 600 mm x 2200 mm (W x D x H)


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Figure 2-2 Front view of the H66 cabinet

II. System layout

Considering the power supply modes and the presence of the SPL frame, the number

of service frames to be held in the cabinet also varies.

Table 2-1 lists six typical layouts of the MA5600 in the H66 cabinet. For more details,

refer to SmartAX MA5600 Multi-service Access Module Installation Manual.


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Table 2-1 MA5600 layout in the H66 cabinet

Cabinet height Power mode Service frame SPL frame

2 YesDC3 No2200 cm

AC 1 Yes

1 YesDC

2 No1800 cm

AC 1 Yes

In case there is no SPL frame, a cabinet can hold three MA5600 service frames toprovide 2688 ADSL2+ subscriber lines.

In case an SPL frame is used, a cabinet can hold two MA5600 service frames to

provide 1792 ADSL2+ subscriber lines.

III. Components in the cabinet

Power supply/power distribution box

In AC power supply mode, the MA5600 uses the GEPS4845 power module

which is 3U (1U=44.45 mm) in height. Both 110 V and 220 V modules are

available. In DC power supply mode, the MA5600 uses a power distribution box which is

2U in height, facilitating 48 V/60 V power input.

Modem frame

A Modem frame of 1U in height can be configured based on your actual

requirements.

MA5600 service frame

The MA5600 service frame is 10U in height (including a 1U fan frame). It

constitutes the major part of the cabinet. For details on the service frame, referto 2.2.2 MA5600 Frame.

The MA5600 uses fans for heat dissipation. The cool air is drawn from the bottom

of the frame, passes through the service boards, and finally is driven out from the

top side of the frame. The fan frame is composed of six 48 V/0.21A DC fans. For

ease of maintenance, each fan can be dismounted separately. Meanwhile, each

fan is equipped with a detection terminal for fan status checking.

SPL frame with line capture function


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The splitter frame is optional. It provides splitter boards to split the xDSL signal

from the POTS/ISDN signal. The main control board SPMF on the splitter frame

also provides a test port that connects with external tester to enable line test.

Air deflector & cabling frameThe frame (3U high) is used for air deflection and cabling.

2.2.2 MA5600 Frame

I. Hardware architecture

The MA5600 frame consists of a service frame and a splitter frame. The number of

service boards and splitter boards to be configured is subject to the planned service

types and traffic volumes.

The dimensions of the MA5600 service frame are: 439.00 mm x 420.00 mm x 444.50

mm (W x D x H).

The backplane of the MA5600 service frame offers GE high speed bus with 16 slots.

Figure 2-3 shows the MA5600 service frame.

0 15

L i n

e b o a r d

Fan frame

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

L i n

e b o a r d

/ I S U / E I U

L i n

e b o a r d

M a i n c o n

t r o l b

o a r d

M a i n c o n

t r o l b

o a r d

L i n

e b o a r d

/ I S U / E I U

Figure 2-3 MA5600 service frame

The 16 slots in the service frame are numbered from 0. Among them,

Slots 7 and 8 always hold SCU boards.

Other 14 slots can house any service board.

The ISU and EIU reside in slot 14 and/or slot 15.

Note:

All boards are hot swappable.


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The SPL frame provides 16 slots, numbered from 0 to 15. Figure 2-4 shows the board

layout in the SPL frame.

S

PL

S

PL

0 15

S

PL

S

PL

S

PL

S

PL

S

PL

S

PL

S

PL

S

PL

S

PL

S

PL

S

PL

SPMF

Figure 2-4 Board arrangement in the MA5600 SPL frame

The SPL frame has a control board (SPMF) and 14 splitter boards that support line

capture. The SPMF provides a test port, which can connect with an external test meter

to facilitate xDSL broadband line test.

II. Working principle

Figure 2-5 shows the block diagram of the MA5600 service frame. The MA5600

employs high speed backplane, enabling inter-board communication over non-blocking

GE bus:

The SCU delivers control messages to the service boards through the GE bus. The service boards (except the ISU) report the configuration information to the

SCU through the GE bus.

The service boards communicate with each other through the GE bus.

The ISU controls itself instead of being controlled by the SCU.


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Maintenance network portMaintenance serial portEnvironment monitor portFE/GE port

GE bus

SCU

SCU

ISU

A

ADBF

ADEF

SHE

A

ISUE

ADSL2+port SHDSL port FE/GE port

EI

U

GE port

Figure 2-5 Working principle of the MA5600 service frame

2.2.3 Boards, Subboards and Ports

I. Boards

Table 2-2 and Table 2-3 list all the boards residing in the service and splitter framesrespectively.

Table 2-2 All boards residing in the MA5600 service frames

Name Type Function External port

SCU Super controlunit

The main control board forsystem control and IP uplinkconnection

1 maintenance port1 serial port1 environmentmonitor port6 FE/GE ports

ISUA Intelligentservice unit

User authentication andaccountingISUA has two subslots:

Subslot 1 holds variousFE/GE optical subboards.

Subslot 2 holds various FEoptical subboards.

If only one subboard isconfigured, it is attachedto subslot 1 fixedly.

8 FE ports, or4 FE ports + 2 GEports


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Name Type Function External port

ISUE

Intelligentservice unit

(The lowersubboard isE4FB, a 4FEelectricalinterfacesubboard)

User authentication andaccountingISUE has two subslots:

Subslot 1 holds variousFE/GE optical subboards.

Subslot 2 holds 4xFEsubboards fixedly.

8 FE ports, or4 FE ports + 2 GEports

EIU Uplink portboard Uplink connection. 1 GE port

ADEF64-port

ADSL2+ overPOTS board

External splitter ADSL2+ over POTS accessGE bus

Line protection

64 ADSL2+ ports

ADBF64-port

ADSL2+ overISDN board

External splitter ADSL2+ over ISDNGE busLine protection

64 ADSL2+ ports

SHEA 32-port SHDSLboard

SHDSL accessGE busLine protection

32 SHDSL ports

Table 2-3 All boards residing in the MA5600 splitter frameName Type Function Port

SPMFSplitter framemain controlboard

Coordinate with the SCU toimplement line capturecontrol on the ADSL2+ board.

2 maintenance serialports2 test ports8 subtending test ports

SPLT

64-port ADSL2+ overPOTS splitterboard

Splitting POTS signal from ADSL2+ signalLine capture600 impedanceN+1 backup

64 ADSL2+ ports64 LINE ports64 POTS ports

SPLQ

64-port ADSL2+ overISDN splitterboard

Supports:

Splitting POTS signal with ADSL2+ signal (2B1Q)Line captureN+1 backup

64 ADSL2+ ports64 LINE ports64 ISDN ports

II. Subboards

Table 2-4 lists all the subboards attached the MA5600s SCU boards.


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Table 2-4 Subboards attached to the MA5600s SCU board

Name Type Position

H531O4GS 4-port GE optical subboard

H531O2GS 2-port GE optical subboard

H531E2GA 2-port GE/FE electricalsubboard

H561E4GFA 4-port GE/FE electricalsubboard

H561O4FM 4-port FE optical subboard

Note: The MA5600 optical port employsthe SFP swappable module. Variousreaches are supported through SFPmodule replacement:

GE single-mode optical module: 10km

GE multi-mode optical module: 500m

FE single-mode optical module: 15km

FE multi-mode optical module: 2 km

2.3 Software Architecture

The MA5600 software consists of the board software and host software. In Figure 2-6,

the part enclosed by the dotted line depicts the software architecture of the MA5600.

MA5600 software architecture

Serialterminal Telnet

Host software

Boardsoftware 1

Boardsoftware 2

Boardsoftware N

...

Comm unication control bus

Serial portconnection

NMS

Inband/outband

Inband/outbant

Figure 2-6 M5600 software architecture


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2-11

I. Board software

The MA5600 board software runs on the service boards for the following purposes:

Service management Data management

Alarm management

Driving and diagnosis

II. Host software

The MA5600 host software runs on the main control board. The software architecture is

based on the TCP/IP model. This architecture covers configuration management,

system service, routing protocol, TCP/IP protocol stack, VLAN protocol, and bottom

driver. It processes network layer protocols, data link layer protocols and messages.

Figure 2-7 shows the MA5600 host software architecture.

TCP/UDP

IP forwarding engine (unicast/multicast forwarding)

Fast forwarding QoS

Routing strategymanagement

Systemservice

C o n f i g u r a t i o n

m a n a g e m e n t

CLI

SNMP

Device management

TFTPFTP TELNET

STP/RSTP

Xmodem

IGMP Proxy 802.1x

Bottom driver

TCP/UDP

IP forwarding engine (unicast/multicast forwarding)

Fast forwarding QoS

Routing strategymanagement

Systemservice

C o n f i g u r a t i o n

m a n a g e m e n t

CLI

SNMP

Device management

TFTPFTP TELNET

STP/RSTP

Xmodem

IGMP Proxy 802.1x

Bottom driver

Figure 2-7 Host software architecture of the MA5600

The MA5600 functional modules and their functions are summarized as follows:

Configuration management module

This module is composed of the CLI terminal and NMS.

System service module


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Services available include configuration, alarm generation, log, traffic statistics

collection and maintenance management.

Routing and TCP/IP protocol stack module

This module processes network layer protocols and data link layer protocols.

Bottom driver module

This module is responsible for device management, loading & backup, operation

system, virtual operating system, bottom layer communication and

communication reliability.


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Technical ManualSmartAX MA5600 Multi-service Access Module Chapter 3 Service Functions


3-1

Chapter 3 Service Functions

This chapter introduces service functions of the MA5600, including:

Broadband Access Services

VLAN Services

Multicast Services

MAC Address Management

Built-in ISU

Routing Management

ARP and ARP Proxy

STP/RSTP

QoS

Terminal Management

Environment Monitoring

3.1 Broadband Access Services

3.1.1 ADSL2+ Service

ADSL2+ is a new generation ADSL technology. Being fully compatible with ADSL,

ADSL2+ has the following enhanced features:

I. New operation modes

ADSL has three operation modes:

ADSL Annex A All Digital Mode ADSL with Improved Spectral Compatibility

with ADSL over POTS. It provides the POTS and ADSL services at the same time

over the same copper pairs.

ADSL Annex B All Digital Mode ADSL with Improved Spectral Compatibility

with ADSL over ISDN. It provides the ISDN and ADSL services at the same time

over the same copper pairs.

ADSL Annex C It provides ADSL in TCM-ISDN crosstalk environment. It is

mainly applied in Japan.

Apart from the above three modes, the following modes are added to ADSL2+:

Annex I Annex A without underlying POTS service. In this mode, the ADSL2

upstream channel uses a frequency spectrum of 3138 KHz, and supports 31

sub-carriers. Accordingly, the upstream bandwidth is increased to over 1 Mbit/s.


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Annex J Annex B without underlying ISDN service. In this mode, the upstream

uses a frequency spectrum of 3276 KHz and supports 64 sub-carriers.

Accordingly, the maximum upstream bandwidth is increased to 2.3 Mbit/s.

II. Improved transmission rate

Compared with ADSL, ADSL2+ supports much higher rate: up to 24 Mbit/s downstream

rate in short-reach transmissions. This is done though the following enhancements:

Improved frame structure

Optimized R-S coding

Wider frequency range

More subcarriers (up to 512)

When ADSL2 Annex J is adopted, the upstream rate can reach 2.3 Mbit/s.

III. Longer transmission reach

Compared with the 5 km reach of ADSL, ADSL2+ supports a transmission reach of 6.5

km at 192/128 kbit/s.

IV. Less power consumption

ADSL2+ supports power management, aiming to reduce overall power consumption.

The following measures are taken for this purpose:

It reduces the power consumption while guaranteeing reliable operation byeliminating excess SNR margin and cutting back the transmit power.

The newly added L2 low power mode can reduce the transmit power by

maintaining just necessary management messages and synchronous signals

when there is no subscriber data traffic. However, the power mode will exit L2

mode to a normal mode when there is subscriber data traffic. Power consumption

in L2 mode is about 30% of that in normal power mode.

In ADSL2+, the CO and CPE both support power cutback ranging from 0 dB to

40 dB. This can effectively decrease transmit power in normal operations.

V. Reliable operation and good frequency spectrum interoperability

ADSL2+ is characterized by reliable operation and excellent frequency spectrum

interoperability:

The tone ordering and pilot tone location is determined by the receiver based on

the channel analysis in order to reflect the real channel conditions and to select the

best tone as the pilot tone. This improves reliability of the ADSL connection.

In the training, the tone blackout enables the receiver to test the Radio Frequency

Interference (RFI) distribution, and also enables control over the transmit power of


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each tone through the CO-MIB. This helps to avoid RFI and reduce crosstalk from

other wire pairs.

ADSL2+ supports dynamic rate adaptation. Enhanced bit swap and seamless rate

adaptation during show time can improve the tolerance to the line parameterchanging.

The short training procedure enables fast recovery and resynchronization from

errors.

VI. Line diagnosis

ADSL2+ supports dual-end loop test, enabling training between the CO and the CPE.

The following line parameters can be obtained through a line test:

Line characteristics

Quiet line noise Power Spectral Density (PSD)

SNR of a subcarrier

SNR gap of a subcarrier

Bearable bits of a subcarrier

Attainable data rate

VII. Better interconnectivity

ADSL2+ divides the ADSL transceiver into several sublayers:

Transport Protocol Specific Transmission Convergence (TPS-TC)

Physical Media Specific Transmission Convergence (PMS-TC) Physical Medium Dependent (PMD)

Management Protocol Specific Transmission Convergence (MPS-TC)

It encapsulates each sublayer and defines messages between these sublayers. This

aids in interoperation between different vendors devices.

3.1.2 SHDSL Service

SHDSL provides high speed symmetric data service over one or two twisted pairs. In

SHDSL access application, the transmit rate ranges from 192 kbit/s to 2312 kbit/s.

SHDSL can automatically adjust the transmission rate at the step of 64 kbit/s based on

distance, line status and noise level.

Features of SHDSL module are as follows:

Conforming to ITU-T G.991.2 Annex A and Annex B.

Adopting Trellis Coded Pulse Amplitude Modulation (TC-PAM) for

modulation/modulation.

Delivering symmetric data rate at 1922312 kbit/s.

Adjusting the transmission rate at the step of 64 kbit/s based on the line conditions

at the time of initialization.


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The STU-R derives power supply from an external power unit. The ESH board

communicates with the external power unit and performs remote monitoring on

the power supply.

Querying and configures SHDSL line parameters, including upstream anddownstream transmission rate, NRS margin, output power, and line attenuation.

Supporting online loading of programmable units and board software.

Supporting remote maintenance and software upgrade.

Supporting output of line alarm messages.

Supporting online upgrading and remote maintenance of firmware and software.

Supporting board alarms and line alarms, including state alarms related to lines

and interfaces, as well as fault alarms related to the remote power supply of

subscriber interfaces.

3.1.3 LAN Service

LAN service is a popular data communication service at present. It allows data burst

and is delay insensitive. It is mainly applied to 100BASE-TX Ethernet access based on

UTP-5 for a reach smaller than 100 m.

The MA5600 is capable of transparent bridging for LAN access service. The MA5600

can provide broadband private line access for medium and small enterprises that are

unable to establish their own private networks, or are unable to afford digital data

networks (DDNs), allowing interconnection between the headquarters and the

branches, and between the enterprise and the Internet with guaranteed QoS such ascertain bandwidth and delay. In this way, these enterprises can easily establish their

own VPNs over the public network.

3.2 VLAN Services

VLAN technology classifies devices on a number of different local area networks (LANs)

based on logical instead of physical connections. This technology makes it possible to

divide a physical LAN into different broadcast domains (known as VLANs) logically.

3.2.1 Standard VLAN

A standard VLAN means a common VLAN. The ports in a standard VLAN are

interconnected and all ports are logically equal to each other. IEEE issued 802.1q

standard draft on LAN implementation in 1999.

The VLAN technology makes it possible to divide a physical LAN into different

broadcast domains (known as VLANs) logically. Each VLAN contains a group of work

stations with the same requirements, similar as a LAN in the physical sense. Since a

VLAN is based on logical connections, devices in a VLAN can be located in different


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network segments. The broadcast and unicast flows of one VLAN will not be forwarded

to other VLANs. This help to ease flow control, simplify network management, protect

carrier investment, and improve network security.

3.2.2 MUX VLAN

A MUX VLAN is an application of the VLAN technology. Its implementation is the same

as that of Standard VLAN. However, compared with a Standard VLAN, a MUX VLAN

includes one or more upstream ports and an access port. Upstream ports are

standardized, while the access port is a virtual service port for user access.

A MUX VLAN adopts a VLAN to identify an access connection.

3.2.3 Smart VLAN

A Smart VLAN is also an application of the VLAN technology. Its functions are the same

as those of Standard VLAN. However, compared with a Standard VLAN, a Smart VLAN

includes one upstream interface and multiple virtual service ports for user access, but

these virtual service ports are isolated each other.

Smart VLAN has the following features:

Two types of ports: upstream port and downstream port

The downstream ports are isolated from each other on the physical layer; the

downstream port can communicate with the upstream port; the upstream portscan communicate with each other; the principle for interworking between

upstream ports in Smart VLAN is the same as that in common VLAN.

Broadcast domains are isolated at two layers (physical layer and link layer),

thereby restricting the broadcast domain and broadcast packets to ensure the

user privacy and network security.

The MA5600 supports 255 Smart VLANs.

In real application, after you allocate multiple downstream ports and one or more

upstream ports to a Smart VLAN, the system will automatically create internal mapping

between the upstream port(s) and downstream ports. In this way MUX VLAN helps to

ease the manual configuration isolate user packets at L2. Such strategy simplifies the

configuration and saves VLAN and IP address resources.

A Smart VLAN does not affect implementation of a common VLAN.

3.2.4 Super VLAN

Super VLAN and Sub VLAN are supported in VLAN aggregation. A Sub VLAN is a

MUX VLAN, Smart VLAN, or Standard VLAN, but cannot work in QinQ or Stacking


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mode. A Sub VLAN belongs to a Super VLAN, and a Super VLAN can include a group

of Sub VLANs.

A Super VLAN corresponds to a route interface at L3. All Sub VLANs in the Super

VLAN share the route interface. This helps to save IP address resources.

A Super VLAN is in a physical network, using VLANs to separate it from broadcast

domains. Host IP addresses are allocated within a network segment, using a default

gateway.

3.2.5 QinQ VLAN

802.1q in 802.1q (QinQ) VLAN enables transmission of VLANs and services of a

private network to the peer end transparently. It is mainly used for leased line services.

A QinQ VLAN ensures that an enterprises internal VLAN Tags can reach to a remote

network through a simple layer 2 tunnel. The following introduces the implementation of

a QinQ VLAN.

After receiving a packet with private VLAN tag, a DSLAM device will assign a public

VLAN ID to the packet and then send it to the upstream network. The packet is

transmitted in the metropolitan backbone network based on its public VLAN ID. When it

reaches a DSLAM device on the other end of the backbone network, its public VLAN

tag will be extracted and restore the original user packet. Then, the packet will be sent

to the CPE.

In summary, the packet delivered in the backbone network has two layers of 802.1q

tags: a public VLAN tag and a private one. In this way, transparent delivery of private

VLANs is realized and public VLAN ID resources are greatly saved.

3.2.6 VLAN Stacking

VLAN stacking is adopted to realize VLAN extension and private line wholesale

service.

When multiple ISPs exist in a L2 metropolitan network, in user access, the user is

identified by its external VLAN ID in the VLAN stacking. The external VLAN ID tells to

which ISP the user belongs. When a user port is connected to a DSLAM device, the

packets from the port are labeled with L2 Tags by the DSLAM device.

The implementation of VLAN stacking is as follows:

VLAN extension

A BRAS is need for VLAN extension and user identification. The system assigns

an internal tag (Customer VLAN) to each port where VLAN stacking is enabled.

Then, the system adds an external tag (Service Provider VLAN) to the ports


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respectively. The packets from these ports are forwarded in the network based on

their external VLAN IDs. After having received the packets, the BRAS will extract

the external VLAN tag and identifies the user by the internal VLAN tag.

Private line wholesale serviceWhen VLAN stacking is adopted to realize private line wholesale service, it is

required that the upper layer network works in L2 mode, and packets are

forwarded directly based on VLANs and MAC addresses.

3.3 Multicast Services

Multicast refers to a process of transmitting packets of data from one source to many

destinations. The key of multicast technology is to carry out packet duplication as near

as the receiver.

Multicast helps to:

Reduce load on the server, so that the server need not handle request on a per

user basis.

Save network bandwidth, which lowers the requirement on the network device.

Adapt to various user quantities, so that increase of users will not impose pressure

on the network.

The following example shows the implementation of multicast. Assume a source host

sends a datagram. The destination in the datagram is the multicast address. All hosts in

the multicast group (namely hosts with the destination multicast address) group can

receive a copy of the datagram. But other hosts in the network cannot receive the

packet. A multicast group is identified by D-class IP address (from 224.0.0.0 to

239.255.255.255).

The MA5600 supports IGMP Proxy and managed multicast.

3.3.1 IGMP Proxy

The MA5600 supports the IGMP proxy function. With the IGMP proxy function, the

multicast router, rather than the MA5600, performs the routing.

From the perspective of a multicast user, the MA5600 is a multicast router

implementing the routers functions defined in the IGMP. It receives the requests from

its downlink users for joining or leaving a multicast group. It also queries at regular

intervals whether a downstream port has multicast group users. By doing so, the

MA5600 obtains multicast group membership information on the downstream ports.

On the other hand, from the perspective of a multicast router, the MA5600 is a multicast

host which sends IGMP requests to the multicast router for joining or leaving a


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designated multicast group. The multicast router does not feel the existence of real

user hosts.

The MA5600 controls the multicast group demanded by the user through the CLI or

NMS. Then it forwards the multicast traffic from the upstream port to the downstreamport based on its group membership information.

The uplink and the downstream ports may not belong to the same VLAN. That is,

31026528-MA5600 Technical Manual(V3.10)

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