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Configuring Data-Link Switching Plus

DLSw+ Configuration Task List

BC-292

Cisco IOS Bridging and IBM Networking Configuration Guide

78-11737-02

Mapping DLSw+ to a Local Data-Link Control

In addition to configuring local and remote peers, you must map one of the following local data-link

controls to DLSw+:

• Token Ring, page 292

• Ethernet, page 293

• SDLC, page 293

• QLLC, page 294

• FDDI, page 295

Token Ring

Traffic that originates from Token Ring is source-route bridged from the local ring onto a source-bridge

ring group and then picked up by DLSw+. You must include a source-bridge ring-group command that

specifies a virtual ring number when configuring Token Ring with DLSw+. In addition, you must

configure the source-bridge command that tells the DLSw+ router to bridge from the physical Token

Ring to the virtual ring.

To specify a virtual ring number, use the following command in global configuration mode:

To enable DLSw+ to bridge from the physical Token Ring ring to the virtual ring, use the following

command in interface mode:

To enable single-route explorers, use the following command in interface mode:

Configuring the source-bridge spanning command is required because DLSw+ uses single-route

explorers by default.

The following command configures a source-bridge ring-group and a virtual ring with a value of

100toDLSw+:

source-bridge ring-group 100

int T0

source-bridge 1 1 100

source-bridge spanning

The ring-group number specified in the source-bridge command must be the number of a defined

source-bridge ring-group or DLSw+ will not see this interface.

Command Purpose

Router(config)# source-bridge ring-group

ring-group [virtual-mac-address]

Defines a virtual ring.

Command Purpose

Router(config-if)# source-bridge

source-ring-number bridge-number

target-ring-number

Defines SRB on interface.

Command Purpose

Router(config-if)# source-bridge spanning

Enables single-route explorers.

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