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Enable Bridging between Transparent Bridging and SRB
Configuring Source-Route Bridging BC-121
We currently know that problems occur with the following protocols when bridged between Token
Ring and other media: Novell IPX, DECnet Phase IV, AppleTalk, VINES, XNS, and IP. Further,
problems can occur with the Novell IPX and XNS protocols when bridged between FDDI and other
media. We recommend that these protocols be routed whenever possible.
To enable SR/TLB, you must perform the task in the following section:
• Enable Bridging between Transparent Bridging and SRB
In addition, you can also perform the tasks in the following sections:
• Disable Fast-Switched SR/TLB
• Enable Translation Compatibility with IBM 8209 Bridges
• Enable Token Ring LLC2-to-Ethernet Conversion
Enable Bridging between Transparent Bridging and SRB
Before enabling bridging, you must have completely configured your router using multiport SRB
and transparent bridging. Once you have done this, establish bridging between transparent bridging
and source-route bridging by using the following command in global configuration mode:
Disable Fast-Switched SR/TLB
To disable fast-switched SR/TLB and cause the router to handle packets by process switching, use
the following command in global configuration mode:
Enable Translation Compatibility with IBM 8209 Bridges
To transfer data between IBM 8209 Ethernet/Token Ring bridges and routers running the SR/TLB
software (to create a Token Ring backbone to connect Ethernets), use the following command on
each Token Ring interface in interface configuration mode:
Command Purpose
source-bridge transparent ring-group pseudo-ring
bridge-number tb-group [oui]
Enable bridging between transparent
bridging and SRB.
Command Purpose
no source-bridge transparent ring-group fastswitch Disable fast-switched SR/TLB.
Command Purpose
ethernet-transit-oui [90-compatible | standard | cisco] Move data between IBM 8209
Ethernet/Token Ring bridges and
routers running translational bridging
software.