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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.