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Using Translation Bridge Services
114060 Rev. A 4-11
The destination MAC address for these BPDUs is the bit-swapped address used
for transparent spanning tree BPDUs. This address differs from the address used
for SRB spanning tree BPDUs. The transparent spanning tree then views the
entire source route network as a single segment. To decide which translation
bridge token ring ports should forward or block trafffic to this network segment,
the router uses the normal transparent bridge spanning tree algorithm based on
bridge priority, bridge MAC address, and port priority.
When designing complex translation bridge network topologies involving loops
between the TB and SR networks, consider how the extended
transparent-translating bridge spanning tree will converge so that you can
determine which translation bridge should forward traffic to the SR network.
Procedure for Configuring the Translation Bridge on Your Network
To configure the translation bridge to work with your network:
1. Enable the bridge on all interfaces attached to TB networks.
Refer to Chapter
1 for details on enabling bridging.
2. Enable source routing on all interfaces attached to SR networks.
Refer to Chapter
2 for details on enabling source routing.
3. Enable the translation bridge for each interface attached to an SR
network that you want to participate in the translation bridge.
Refer to
Enabling Source Routing Translate/LB Service” for instructions.
Use the Bridge Interfaces window to set the Translation Bridge Enable
parameter to Enable. (Refer to Chapter
1 for details on configuring bridge
parameters.)
4. Create the translation bridge on the router.
Refer to “Creating the
Translation Bridge” later in this chapter for
instructions.
Once you create the translation bridge, all TB interfaces on the router
automatically participate in translation bridging.
5. Enable the spanning tree on all TB and SR interfaces on the network on
which you want to use the translation bridge if you want to use the
spanning tree algorithm to eliminate loops in the network.
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