H3C SR6600 SPE-FWM Configuration manual

Brand: H3C

Model: SR6600 SPE-FWM

Type: Configuration manual

H3C SR6600 Routers

Layer 2 – WAN

Configuration Guide

Hangzhou H3C Technologies Co., Ltd.

http://www.h3c.com

Document Version: 20100930-C-1.08

Product Version: SR6600-CMW520-R2420

No part of this manual may be reproduced or transmitted in any form or by any means without prior

written consent of Hangzhou H3C Technologies Co., Ltd.

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Care,

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SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V

G, V

G, PSPT,

XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co.,

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All other trademarks that may be mentioned in this manual are the property of their respective owners.

Notice

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

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface

The H3C SR6600 documentation set includes 13 configuration guides, which describe the software

features for the H3C SR6600 Routers and guide you through the software configuration procedures.

These configuration guides also provide configuration examples to help you apply software features to

different network scenarios.

The Layer 2 – WAN Configuration Guide describes the fundamentals and configuration of ATM, PPP,

frame relay, HDLC, L2TP, and so on.

This preface includes:

z Audience

z Conventions

z About the H3C SR6600 Documentation Set

z Obtaining Documentation

z Documentation Feedback

Audience

This documentation is intended for:

z Network planners

z Field technical support and servicing engineers

z Network administrators working with the SR6600

Conventions

This section describes the conventions used in this documentation set.

Command conventions

Convention Description

Boldface Bold

text represents commands and keywords that you enter literally as shown.

italic

Italic text represents arguments that you replace with actual values.

[ ]

Square brackets enclose syntax choices (keywords or arguments) that are

optional.

{ x | y | ... }

Braces enclose a set of required syntax choices separated by vertical bars,

from which you select one.

[ x | y | ... ]

Square brackets enclose a set of optional syntax choices separated by vertical

bars, from which you select one or none.

{ x | y | ... } *

Asterisk marked braces enclose a set of required syntax choices separated by

vertical bars, from which you select at least one.

[ x | y | ... ] *

Asterisk marked square brackets enclose optional syntax choices separated by

vertical bars, from which you may select multiple choices or none.

&<1-n>

The argument or keyword and argument combination before the ampersand (&)

sign can be entered 1 to n times.

# A line that starts with a pound (#) sign is comments.

GUI conventions

Convention Description

Boldface

Window names, button names, field names, and menu items are in Boldface.

For example, the

New User

window appears; click

Multi-level menus are separated by angle brackets. For example,

File

Create

Folder

Symbols

Convention Description

Means reader be extremely careful. Improper operation may cause bodily

injury.

Means reader be careful. Improper operation may cause data loss or damage to

equipment.

Means an action or information that needs special attention to ensure

successful configuration or good performance.

Means a complementary description.

Means techniques helpful for you to make configuration with ease.

Network topology icons

Convention Description

Represents a generic network device, such as a router, switch, or firewall.

Represents a routing-capable device, such as a router or Layer 3 switch.

Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router

that supports Layer 2 forwarding and other Layer 2 features.

About the H3C SR6600 Documentation Set

The H3C SR6600 documentation set includes:

Category Documents Purposes

Marketing brochures Describe product specifications and benefits.

Technology white papers

Provide an in-depth description of software features

and technologies.

Product description and

specifications

Card datasheets Describe card specifications, features, and standards.

Compliance and safety

manual

Provides regulatory information and the safety

instructions that must be followed during installation.

Installation guide

Provides a complete guide to hardware installation

and hardware specifications.

Hardware specifications

and installation

Card manuals Provide the hardware specifications of cards.

Category Documents Purposes

H3C N68 Cabinet

Installation and Remodel

Introduction

Guides you through installing and remodeling H3C

N68 cabinets.

Configuration guides

Describe software features and configuration

procedures.

Software configuration

Command references Provide a quick reference to all available commands.

H3C SR6608 Release

notes

Operations and

maintenance

H3C SR6602 Release

notes

Provide information about the product release,

including the version history, hardware and software

compatibility matrix, version upgrade information,

technical support information, and software upgrading.

Obtaining Documentation

You can access the most up-to-date H3C product documentation on the World Wide Web at

http://www.h3c.com.

Click the links on the top navigation bar to obtain different categories of product documentation:

[Technical Support & Documents > Technical Documents] – Provides hardware installation, software

upgrading, and software feature configuration and maintenance documentation.

[Products & Solutions] – Provides information about products and technologies, as well as solutions.

[Technical Support & Documents > Software Download] – Provides the documentation released with

the software version.

Technical Support

customer_service@h3c.com

http://www.h3c.com

Documentation Feedback

You can e-mail your comments about product documentation to inf[email protected].

We appreciate your comments.

Table of Contents

1 ATM Configuration ....................................................................................................................................1-1

Introduction to ATM Technology .............................................................................................................1-1

ATM Overview .................................................................................................................................1-1

ATM Architecture.............................................................................................................................1-2

Overview of IPoA, IPoEoA, PPPoA and PPPoEoA Applications............................................................1-3

IPoA.................................................................................................................................................1-3

IPoEoA ............................................................................................................................................1-3

PPPoA .............................................................................................................................................1-3

PPPoEoA.........................................................................................................................................1-3

ATM Service Types.................................................................................................................................1-4

CBR .................................................................................................................................................1-4

rt_VBR .............................................................................................................................................1-4

nrt_VBR ...........................................................................................................................................1-4

UBR .................................................................................................................................................1-4

Introduction to InARP..............................................................................................................................1-4

ATM OAM ...............................................................................................................................................1-5

OAM F5 Loopback...........................................................................................................................1-5

OAM Continuity Check ....................................................................................................................1-5

ATM Configuration Task list....................................................................................................................1-5

Configuring an ATM Interface .................................................................................................................1-6

Configuring an ATM Subinterface...........................................................................................................1-6

Configuring an ATM Subinterface ...................................................................................................1-6

Checking Existence of PVCs When Determining the Protocol State of an ATM P2P

Subinterface ...................................................................................................................................

1-7

Configuring a PVC and the Maximum Number of PVCs Allowed on an Interface..................................1-7

Configuring PVC Parameters ..........................................................................................................1-7

Setting the CLP Bit for ATM Cells ...................................................................................................1-8

Assigning a Transmission Priority to an ATM PVC .........................................................................1-9

Configuring PVC Service Mapping................................................................................................1-10

Configuring the Maximum Number of PVCs Allowed on an ATM Interface..................................1-10

Configuring an ATM Class ....................................................................................................................1-11

Configuring VP Policing ........................................................................................................................1-13

Configuring Applications Carried by ATM.............................................................................................1-13

Configuring IPoA ...........................................................................................................................1-13

Configuring IPoEoA .......................................................................................................................1-14

Configuring PPPoA........................................................................................................................1-15

Configuring PPPoEoA ...................................................................................................................1-16

Displaying and Maintaining ATM ..........................................................................................................1-17

ATM Configuration Examples ...............................................................................................................1-17

IPoA Configuration Example .........................................................................................................1-18

IPoEoA Configuration Example.....................................................................................................1-19

PPPoA Configuration Example .....................................................................................................1-20

PPPoEoA Server Configuration Example .....................................................................................1-22

ATM PVC Transmit Priority Configuration Example......................................................................1-23

Troubleshooting ATM............................................................................................................................1-24

Link State Error in IPoA Application ..............................................................................................1-24

Link Report Error in PPPoA Application ........................................................................................1-24

Ping Failure ...................................................................................................................................1-24

ATM Interface State Error .............................................................................................................1-25

PVC State is Down while ATM Interface State is Up ....................................................................1-25

Ping Failure after PPPoA Configuration........................................................................................1-25

Packet Loss and CRC Errors and Changes of Interface State .....................................................1-26

2 PPP and MP Configuration.....................................................................................................................2-27

Introduction to PPP and MP..................................................................................................................2-27

PPP................................................................................................................................................2-27

MP .................................................................................................................................................2-30

Configuring PPP....................................................................................................................................2-31

Configuring PPP ............................................................................................................................2-31

Configuring PAP Authentication ....................................................................................................2-32

Configuring CHAP Authentication .................................................................................................2-33

Configuring PPP Negotiation.........................................................................................................2-35

Enabling the Generating of PPP Accounting Statistics .................................................................2-38

Configuring MP .....................................................................................................................................2-39

Configuring MP Using a VT Interface............................................................................................2-39

Configuring an MP through an MP-group......................................................................................2-41

Configuring Short Sequence Number Header Format Negotiation...............................................2-41

Configuring MP Endpoint Options .................................................................................................2-42

Configuring PPP Link Efficiency Mechanisms ......................................................................................2-43

Introduction to PPP Link Efficiency Mechanisms ..........................................................................2-43

Configuring PPP Link Efficiency Mechanisms ..............................................................................2-43

Displaying and Maintaining PPP/MP/PPP Link Efficiency Mechanism ................................................2-44

PPP and MP Configuration Examples ..................................................................................................2-44

One-Way PAP Authentication Configuration Example..................................................................2-44

Two-Way PAP Authentication Configuration Example..................................................................2-46

One-Way CHAP Authentication Configuration Example...............................................................2-48

PPP IP Address Negotiation Configuration Example....................................................................2-50

MP Configuration Example............................................................................................................2-51

MP Binding Mode Configuration Examples...................................................................................2-54

Troubleshooting PPP Configuration......................................................................................................2-61

3 PPPoE Configuration ..............................................................................................................................3-63

Introduction to PPPoE...........................................................................................................................3-63

Configuring a PPPoE Server ................................................................................................................3-64

Displaying and Maintaining PPPoE ......................................................................................................3-65

PPPoE Configuration Example .............................................................................................................3-65

PPPoE Server Configuration Example..........................................................................................3-65

iii

4 L2TP Configuration .................................................................................................................................4-67

L2TP Overview......................................................................................................................................4-67

Introduction....................................................................................................................................4-67

Typical L2TP Networking Application............................................................................................4-68

Basic Concepts of L2TP ................................................................................................................4-69

L2TP Tunneling Modes and Tunnel Establishment Process ........................................................4-70

L2TP Features...............................................................................................................................4-73

Protocols and Standards ...............................................................................................................4-73

L2TP Configuration Task List................................................................................................................4-73

Configuring Basic L2TP Capability .......................................................................................................4-74

Configuring an LAC...............................................................................................................................4-75

Configuring an LAC to Initiate Tunneling Requests for Specified Users.......................................4-75

Configuring an LAC to Transfer AVP Data in Hidden Mode .........................................................4-75

Configuring AAA Authentication of VPN Users on LAC Side........................................................4-76

Configuring an LNS...............................................................................................................................4-77

Creating a Virtual Interface Template............................................................................................4-77

Configuring the Local Address and the Address Pool for Allocation.............................................4-77

Configuring an LNS to Grant Certain L2TP Tunneling Requests .................................................4-78

Configuring User Authentication on an LNS .................................................................................4-79

Configuring AAA Authentication of VPN Users on LNS Side........................................................4-80

Enabling L2TP Multi-Instance .......................................................................................................4-81

Specifying to Send ACCM.............................................................................................................4-81

Configuring L2TP Connection Parameters ...........................................................................................4-82

Configuring L2TP Tunnel Authentication.......................................................................................4-82

Setting the Hello Interval ...............................................................................................................4-82

Enabling Tunnel Flow Control .......................................................................................................4-83

Disconnecting Tunnels by Force ...................................................................................................4-83

Displaying and Maintaining L2TP .........................................................................................................4-83

L2TP Configuration Examples ..............................................................................................................4-83

NAS-Initiated VPN .........................................................................................................................4-84

Client-Initiated VPN .......................................................................................................................4-86

L2TP Multi-Domain Application .....................................................................................................4-87

Complicated Network Application..................................................................................................4-91

Troubleshooting L2TP...........................................................................................................................4-91

5 L2TP-Based EAD Configuration.............................................................................................................5-93

L2TP-Based EAD Overview..................................................................................................................5-93

L2TP-Based EAD Configuration Example ............................................................................................5-94

Network Requirements ..................................................................................................................5-94

Configuration Procedure................................................................................................................5-95

6 HDLC Configuration................................................................................................................................6-97

Introduction to HDLC.............................................................................................................................6-97

HDLC Overview.............................................................................................................................6-97

HDLC Frame Format and Frame Type .........................................................................................6-97

Enabling HDLC on an Interface ............................................................................................................6-98

Configuring an IP Address for an Interface...........................................................................................6-98

Configuring the Link State Polling Interval............................................................................................6-99

HDLC Configuration Examples .............................................................................................................6-99

Basic HDLC Configuration Example .............................................................................................6-99

HDLC in Conjunction with IP Unnumbered Interface Configuration Example ............................6-100

7 HDLC Link Bundling Configuration.....................................................................................................7-103

Overview .............................................................................................................................................7-103

Basic Concepts of HDLC Link Bundling ......................................................................................7-103

How HDLC Link Bundling Works.................................................................................................7-104

Configuring an HDLC Link Bundle Interface.......................................................................................7-105

Assigning an Interface to an HDLC Link Bundle.................................................................................7-107

Displaying and Maintaining HDLC Link Bundling ...............................................................................7-108

HDLC Link Bundling Configuration Example ......................................................................................7-108

8 Frame Relay Configuration...................................................................................................................8-111

Overview .............................................................................................................................................8-111

Frame Relay Interface Types ......................................................................................................8-111

Virtual Circuit ...............................................................................................................................8-112

Data Link Connection Identifier ...................................................................................................8-112

Frame Relay Address Mapping...................................................................................................8-113

LMI Protocol ................................................................................................................................8-113

Typical Application Scenarios .....................................................................................................8-114

Frame Relay Configuration Task List..................................................................................................8-115

Configuring DTE Side Frame Relay....................................................................................................8-115

Configuring Basic DTE Side Frame Relay ..................................................................................8-115

Configuring Frame Relay Address Mappings..............................................................................8-116

Configuring a Frame Relay Local Virtual Circuit .........................................................................8-117

Configuring a Frame Relay Subinterface ....................................................................................8-117

Configuring DCE Side Frame Relay ...................................................................................................8-118

Configuring Basic DCE Side Frame Relay..................................................................................8-118

Configuring Frame Relay Address Mappings..............................................................................8-119

Configuring Frame Relay Local Virtual Circuit ............................................................................8-119

Configuring Frame Relay Subinterface .......................................................................................8-119

Configuring Frame Relay Switching ............................................................................................8-119

Enabling the Trap Function.................................................................................................................8-120

Displaying and Maintaining Frame Relay ...........................................................................................8-121

Frame Relay Configuration Examples ................................................................................................8-121

Connecting LANs through a Frame Relay Network ....................................................................8-121

Connecting LANs with a Dedicated Line .....................................................................................8-122

Troubleshooting Frame Relay.............................................................................................................8-124

9 Multilink Frame Relay Configuration...................................................................................................9-125

Overview .............................................................................................................................................9-125

Configuring Multilink Frame Relay ......................................................................................................9-126

Configuring an MFR Bundle ........................................................................................................9-126

Configuring an MFR Bundle Link ................................................................................................9-127

Displaying and Maintaining Multilink Frame Relay .............................................................................9-127

Multilink Frame Relay Configuration Examples ..................................................................................9-127

MFR Direct Connection Configuration Example .........................................................................9-127

MFR Switched Connection Configuration Example ....................................................................9-128

10 Modem Management Configuration ................................................................................................10-131

Overview ...........................................................................................................................................10-131

Modem Management Configuration..................................................................................................10-131

Setting the Modem Answer Mode .............................................................................................10-132

Issuing an AT Command to a Modem.......................................................................................10-132

Troubleshooting ................................................................................................................................10-132

11 Index ...................................................................................................................................................11-134

1-1

1 ATM Configuration

This chapter includes these sections:

z Introduction to ATM Technology

z Overview of IPoA, IPoEoA, PPPoA and PPPoEoA Applications

z ATM Service Types

z ATM Configuration Task list

z Configuring an ATM Interface

z Configuring an ATM Subinterface

z Configuring a PVC and the Maximum Number of PVCs Allowed on an Interface

z Configuring an ATM Class

z Configuring VP Policing

z Configuring Applications Carried by ATM

z Displaying and Maintaining ATM

z ATM Configuration Examples

z Troubleshooting ATM

Introduction to ATM Technology

ATM Overview

Asynchronous Transfer Mode (ATM) is a technology based on the packet switching mode while

incorporating the high speed of the circuit switching mode. It can accommodate various

communications services. ATM was specified as a broadband ISDN transmission and switching mode

by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) in

June 1992. Due to its flexibility and support for multimedia services, it is regarded as the core

technology to implement broadband communications.

As defined by the ITU-T, data is encapsulated in cells in ATM. Each ATM cell is 53 bytes in length, of

which 5 bytes is the cell header and the remaining 48 bytes are the payload. The major function of the

cell header is to identify virtual connection, with limited functions on flow control, congestion control and

error control.

ATM is connection-oriented and ATM connections are logical connections, or virtual connections (VCs).

Each VC is identified by a pair of virtual path identifier (VPI) and virtual channel identifier (VCI). VPI/VCI

assignment has only local significance. Thus the VPI and VCI are translated at each ATM node and are

unique only for a given physical link. When a connection is released, all the involved VPI/VCI pairs are

reclaimed for new connections.

Currently, ATM interfaces only support permanent virtual circuits (PVCs).

1-2

ATM Architecture

ATM has a three-dimensional architecture. It consists of three planes: user plane, control plane, and

management plane. Both the user plane and the control plane are divided into four layers, namely,

physical layer, ATM layer, ATM Adaptation Layer (AAL), and upper layer, each of which are further

divided into sub-layers.

z The control plane takes the charge of establishing and tearing down connections using signaling

protocols.

z The management plane consists of layer management and plane management. The former takes

charge of managing the layers in each plane and has a layered structure corresponding to other

planes. The latter is responsible for system management and communications between different

planes.

The following figure illustrates the relationships between layers and planes in ATM.

Figure 1-1 ATM architecture

The functions of the four ATM layers are as follows:

z The physical layer mainly provides transmission channels for ATM cells. At this layer, cells passed

from the ATM layer become continuous bit stream after transmission overheads are added to them.

In addition, continuous bit streams received from the physical media are restored to cells on this,

which are then passed to the ATM layer.

z The ATM layer, residing over the physical layer, implements cell-based communication with peer

layers by invoking the services provided by the physical layer. It is independent of physical media

and the implementation of the physical layer, as well as the types of the services being carried.

Data passed to this layer takes the form of 48-byte payloads, known as segmentation and

reassembly protocol data units (SAR-PDUs); and data passed from this layer to the physical layer

is 53-byte cells, with the 48-byte payload being encapsulated in a 5-byte header. Other functions of

the ATM layer include VPI/VCI transmission, cell multiplexing/demultiplexing, and generic flow

control.

z ATM Adaptation Layer (AAL) provides interfaces between high-level protocols and the ATM Layer.

It is responsible for forwarding the information between ATM layer and upper layer protocols. At

present, four types of AAL are available: AAL1, AAL2, AAL3/4, and AAL5, each of which supports

1-3

specific services provided in an ATM network. Most ATM equipment vendors adopt AAL5 for data

communication services.

z ATM upper layer protocols take charge of WAN interconnection, voice interconnection, Layer 3

interconnection, encapsulation, LAN emulation, multi-protocol over ATM, and traditional IP.

Overview of IPoA, IPoEoA, PPPoA and PPPoEoA Applications

ATM interfaces support the IPoA, IPoEoA, PPPoA and PPPoEoA applications.

IPoA

IP over ATM (IPoA) enables ATM to carry IP packets. In an IPoA implementation, ATM serves as the

data link layer protocol for the IP hosts on the same network. To enable these hosts to communicate

across an ATM network, IP packets must be encapsulated in ATM cells.

By making full use of the advantages of ATM, IPoA delivers excellent network performance and

ubiquitous mature QoS assurance.

IPoEoA

IPoE over ATM (IPoEoA) adopts a three-layer architecture, with IP encapsulation at the uppermost layer,

IP over Ethernet (IPoE) in the middle, and IPoEoA at the bottom.

IPoEoA is suitable where Ethernet packets are to be forwarded through ATM interfaces. In IPoEoA

applications, you can associate multiple PVCs with one virtual Ethernet (VE) interface and PVCs

associated with the same VE interface are interconnected at Layer 2.

PPPoA

PPP over ATM (PPPoA) enables ATM to carry PPP protocol packets. With PPPoA, PPP packets, in

which IP packets or other protocols’ packets can be encapsulated, are encapsulated in ATM cells. In this

way, ATM may be simply viewed as the carrier of PPP packets. As the communication process of

PPPoA is managed by PPP, PPPoA also features the flexibility and comprehensive applications of PPP.

To transmit PPP packets through ATM, a virtual template (VT) interface is required.

PPPoEoA

PPPoE over ATM (PPPoEoA) enables ATM to carry PPPoE (PPP over Ethernet) protocol packets. With

PPPoEoA, Ethernet packets are encapsulated in ATM cells, through which you can use a PVC to

simulate all the functions of Ethernet. To allow ATM to carry Ethernet frames, the interface management

module provides a new type of virtual Ethernet (VE) interface. This type of VE interface has Ethernet

characteristics and can be dynamically created through configuration commands. The following is the

protocol stack adopted by the VE interface:

z ATM PVC (the bottom layer)

z Ethernet (the link layer)

z Network layer and other upper layers (the same as those for common Ethernet interfaces)

1-4

ATM Service Types

ATM supports four service types: constant bit rate (CBR), unspecified bit rate (UBR), real-time variable

bit rate (rt_VBR) and non-real-time variable bit rate (nrt_VBR). They are used for the QoS purpose.

CBR

CBR provides ensured, constant bandwidth. The bandwidth assigned to the CBR service is decided by

the peak cell rate (PCR). For a station using the CBR service, ATM cells are sent at PCR continuously

with assured QoS.

Usually, CBR is suitable for jitter-sensitive real-time applications such as audio and video.

rt_VBR

The rt_VBR service is provided for applications that have strict restrictions on delay and jitter, such as

audio and video.

An rt_VBR connection is described by the PCR, sustainable cell rate (SCR) and maximum burst size

(MBS). A station using the rt_VBR service is allowed to send burst traffic at PCR with the maximum

traffic size being MBS without packet loss while the average cell rate being SCR.

nrt_VBR

The nrt_VBR service supports non-real-time applications with burst traffic. An nrt_VBR connection is

described by PCR, SCR and MBS. The nrt_VBR service is suitable for applications that are sensitive to

cell loss but not to delay.

UBR

The UBR service does not make any service quality commitment, guaranteeing neither CLR nor cell

delay. When traffic congestion occurs, cells of the UBR service are always dropped first. The UBR

service is suitable for applications that have low requirements for delay and bandwidth.

Introduction to InARP

On an ATM PVC connection, you can use the Inverse Address Resolution Protocol (InARP) to obtain

the IP address of the remote end connected to the PVC. Thus, you do not need to manually configure

the IP address of the remote end. The following figure shows how InARP works:

1-5

Figure 1-2 Inverse address resolution procedure of InARP

ATM OAM

OAM stands for Operation And Maintenance in the ITU-T I.610 recommendation (02/99) and Operation

Administration and Maintenance in LUCENT APC User Manual (03/99).

Whichever expansion is adopted, OAM provides a way of detecting faults, isolating faults, and

monitoring network performance without interrupting ongoing services. By inserting OAM cells, which

are constructed in the standard ATM cell format, in cell streams, you can obtain specific information

about the network.

OAM F5 Loopback

The OAM F5 loopback function of ATM works as follows on a PVC:

Each side of the PVC sends OAM cells to its peer periodically. On receiving an OAM cell from the

sender, the receiver returns the OAM cell to the sender. If the sender receives the cell within the

specified period, it considers the PVC as normal. If the sender fails to receive a certain number of

consecutive OAM cells sent by itself, the PVC is considered as faulty.

Two approaches are available for implementing the OAM F5 Loopback function: manual (OAMPing)

and auto (OAM Frequency). In the OAMPing approach, you need to send OAM cells manually; this

approach is usually used for diagnosis. In the OAM Frequency approach, you need to configure an ATM

interface to send OAM cells regularly at a certain interval; this approach is usually used for automatic

link status checking.

OAM Continuity Check

When enabled, the OAM Continuity Check (CC) function periodically sends OAM cells to check whether

a connection is idle or has failed.

OAM CC works as follows on a PVC:

One side of the PVC sends OAM cells to its peer, which checks the connection status based on these

OAM cells.

ATM Configuration Task list

Complete these tasks to configure ATM:

1-6

Task Remarks

Configuring an ATM Interface Required

Configuring an ATM Subinterface

Configuring an ATM

Subinterface

Checking Existence of PVCs When Determining

the Protocol State of an ATM P2P Subinterface

Optional

Configuring PVC Parameters Required

Assigning a Transmission Priority to an ATM

PVC

Optional

Configuring PVC Service Mapping Optional

Configuring a PVC and the

Maximum Number of PVCs

Allowed on an Interface

Configuring the Maximum Number of PVCs

Allowed on an ATM Interface

Optional

Configuring an ATM Class Optional

Configuring VP Policing Optional

Configuring IPoA

Configuring IPoEoA

Configuring PPPoA

Configuring Applications

Carried by ATM

Configuring PPPoEoA

Required

Use one of the

approaches.

Configuring an ATM Interface

Depending on the actual networking environment and system requirements, you may be required to

modify certain parameters of an ATM interface.

Note that except the mtu command, which can be configured on a subinterface, the ATM settings in this

section must be modified in ATM main interface view, although they apply to the ATM main interface and

subinterfaces at the same time.

For more information about ATM interface configuration, see ATM Interface Configuration in the

Interface Configuration Guide.

Configuring an ATM Subinterface

Follow these steps to configure an ATM subinterface:

To do… Use the command… Remarks

Enter system view

system-view

—

Create an ATM subinterface and

enter its view

interface atm

interface-number.subnumber

[

p2mp

p2p

]

Required

By default, the type of a

subinterface is point-to-multipoint

(p2mp).

1-7

To do… Use the command… Remarks

Set the MTU for the ATM

subinterface

mtu

mtu-number

Optional

1500 bytes by default

Shut down the ATM interface

shutdown

Optional

By default, an ATM interface is up.

The keywords p2mp and p2p are available with the interface atm interface-number.subnumber only

when you are creating an ATM subinterface. If you are entering an existing ATM subinterface, the two

keywords are not available.

Checking Existence of PVCs When Determining the Protocol State of an ATM P2P

Subinterface

Follow these steps to check existence of PVCs when determining the protocol state of an ATM P2P

subinterface:

To do… Use the command… Remarks

Enter system view

system-view

—

Create an ATM subinterface and

enter its view

interface atm

interface-number.subnumber

p2p

Required

By default, the subinterface is

configured as point-to-multipoint

(p2mp).

Check existence of PVCs when

determining the protocol state of

the ATM P2P subinterface

atm-link check

Required

By default, the protocol state of the

ATM P2P subinterface is

consistent with the state of the

physical interface.

Configuring a PVC and the Maximum Number of PVCs Allowed on

an Interface

Configuring PVC Parameters

Follow these steps to configure PVC parameters:

To do... Use the command… Remarks

Enter system view

system-view

—

Enter ATM interface view or ATM

subinterface view

interface atm

{ interface-number |

interface-number.subnumber }

—

Create a PVC and enter PVC view

pvc

{ pvc-name [ vpi/vci ] |

vpi/vci }

Required

By default, no PVC is created.

1-8

To do... Use the command… Remarks

Set the AAL5 encapsulation protocol

type for the specified PVC

encapsulation

aal5-encap

Optional

By default, aal5snap encapsulation

is adopted.

Start transmission and retransmission

detection of operations,

administration, and maintenance

(OAM) F5 Loopback cells

oam frequency

frequency [

up-count

down

down-count

retry-frequency

retry-frequency ]

Optional

By default, OAM F5 Loopback cell

transmission is disabled. However,

if an OAM F5 Loopback cell is

received, it should be responded.

By default, up-count is 3,

down-count is 5 and

retry-frequency is 1 second.

Set the parameters for alarm

indication signal (AIS)/ remote defect

indication (RDI) alarm cell detection

oam ais-rdi

up-count

down

down-count

Optional

By default, AIS/RDI alarm cell

detection is enabled, which means

the PVC goes down when the

number of AIS/RDI alarm cells

received reaches down-count and

goes up if no AIS/RDI alarm cell is

received in a period specified by

the up-count argument (in

seconds).

Set the PVC’s

service type to

constant bit rate

(CBR)

service cbr

output-pcr [

cdvt

cdvt-value ]

Set the PVC’s

service type to

unspecified bit

rate (UBR), and

set the

rate-related

parameters

service ubr

output-pcr

Set the PVC’s

service type to

variable bit

rate-non real

time (nrt_VBR),

and set the

rate-related

parameters

service vbr-nrt

output-pcr

output-scr output-mbs

Set the PVC

service type and

the rate-related

parameters

Set the PVC’s

service type to

variable bit

rate-real time

(rt_VBR), and

set the

rate-related

parameters

service vbr-rt

output-pcr

output-scr output-mbs

Optional

By default, the service type of a

PVC is UBR.

The CDVT is 500μs by default.

You can use these four commands

to set the service type and the

parameters concerning

transmission rate. Note that a

newly configured service type

overwrites the existing one.

Setting the CLP Bit for ATM Cells

By setting the Cell Loss Priority (CLP) bit in ATM cells, you can redefine the drop probability of ATM cells

when the network becomes congested.

Follow these steps to set the CLP bit for ATM cells:

1-9

To do… Use the command… Remarks

Enter system view

system-view

—

Create a class and enter class view

traffic classifier

tcl-name

[

operator

{

and

} ]

—

Configure the match criteria

if-match

[

not

]

match-criteria

—

Quit to system view

quit

—

Create a traffic behavior and enter

traffic behavior view

traffic behavior

behavior-name

—

Set the cell loss priority (CLP) bit

for ATM cells

remark atm-clp

atm-clp-value

Optional

The CLP bit of ATM cells is 0 or 1.

When congestion occurs, ATM

cells with CLP bit 1 are dropped

preferentially.

Quit to system view

quit

—

Create a policy and enter policy

view

qos policy

policy-name

—

Associate the class with the traffic

behavior in the policy

classifier

tcl-name

behavior

behavior-name

—

Quit to system view

quit

—

Enter ATM interface or

subinterface view

interface atm

{ interface-number |

interface-number.subnumber }

—

Create a PVC and enter PVC view

pvc

{ pvc-name [ vpi/vci ] | vpi/vci }

Required

By default, no PVC is created.

Apply the QoS policy on the PVC

qos apply policy

policy-name

{

inbound

outbound

}

Required

For more information about classes, traffic behaviors, and policies, see QoS in the ACL and QoS

Configuration Guide.

Assigning a Transmission Priority to an ATM PVC

You can assign transmission priorities to ATM PVCs associated with the UBR, rt_VBR, or nrt_VBR

service. At the time of bandwidth allocation, the PVC with higher priority has priority over other PVCs.

Follow these steps to assign a transmission priority to an ATM PVC:

To do… Use the command… Remarks

Enter system view

system-view

—

Enter ATM subinterface view

interface atm

{ interface-number |

interface-number.subnumber }

—

Create a PVC and enter PVC view

pvc

{ pvc-name [ vpi/vci ] | vpi/vci } —

1-10

To do… Use the command… Remarks

Assign a transmission priority to

the ATM PVC

transmit-priority

value

Optional

By default, the priority value is 0 for

the UBR service, 5 for the nrt_VBR

service and 8 for the rt_VBR.

Currently, you can assign transmission priorities to ATM PVCs only on a MIM-ATM card.

Configuring PVC Service Mapping

PVC service mapping allows different PVCs from the same PVC-Group to carry IP packets of different

priorities.

Follow these steps to configure PVC service mapping:

To do... Use the command... Remarks

Enter system view

system-view

—

Enter ATM subinterface view

interface atm

{ interface-number |

interface-number.subnumber }

—

Create PVC, and enter its view

pvc

{ pvc-name [ vpi/vci ] | vpi/vci }—

Quit to ATM interface view

quit

—

Create a PVC group and enter

PVC group view

pvc-group

{ pvc-name [ vpi/vci ] |

vpi/vci }

Required

Make sure that the PVC specified

by the pvc-name or vpi/vci

argument already exists.

Add a PVC to the PVC-Group

pvc

{ pvc-name [ vpi/vci ] | vpi/vci } Optional

Set the priority of the IP packets

carried on PVC

ip-precedence

{ pvc-name

[ vpi/vci ] | vpi/vci } { min [ max ] |

default

}

Optional

z A primary PVC refers to the one based on which a PVC-group is created on an ATM interface.

z A secondary PVC refers to a PVC created in a PVC-group.

Configuring the Maximum Number of PVCs Allowed on an ATM Interface

Follow these steps to configure the maximum number of PVCs allowed on an ATM interface:

To do… Use the command… Remarks

Enter system view

system-view

—

Enter ATM interface view

interface atm

interface-number —

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H3C SR6600 SPE-FWM Configuration manual

H3C SR6600 SPE-FWM Configuration manual

H3C SR6600 SPE-FWM Configuration manual

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