Avaya Configuring Bridging Services Manual de usuario Pagina 153

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Using Translation Bridge Services
117351-A 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 SR 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 traffic 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.
See Cha
pter 1 for details on enabling bridging.
2. Enable source routing on all interfaces attached to SR networks.
See Cha
pter 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.
See “Enabling Source Routing Translate/LB Service” on pa
ge 4-12 for
instructions. Use the Bridge Interfaces window to set the Translation Bridge
Enable parameter to Enable. (See Cha
pter 1 for details on configuring bridge
parameters.)
4. Create the translation bridge on the router.
See “Cr
eating the Translation Bridge” on page 4-14 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 the spanning
tree algorithm to eliminate loops in the network.
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