Avaya Configuring Bridging Services Manual de usuario Pagina 158

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Configuring Bridging Services
4-10 114060 Rev. A
Figure 4-2. Spanning Tree with Translation Bridging
When you use the spanning tree protocol in a translation bridging environment,
the token ring interfaces of the translation bridge send out special spanning tree
bridge PDUs as spanning tree explorer frames (STEs). These BPDUs are
essentially transparent spanning tree bridge PDUs adapted for the source route
environment. These spanning tree BPDUs have no relation to whether you
configured the source route bridge as a spanning tree. They are simply sent as
STEs so that if a source route spanning tree exists, their impact on network traffic
is minimized.
SR Network
XB
XB
TB Network 1
TB Network 2
Bridge A Bridge B Bridge C
Bridge D
TB Network 3
loop
Key
TB = Transparent Bridge
XB = Translation Bridge
F
F
F
Spanning Tree States
F = Forwarding
B = Blocking
TB/SP
TB/SP
TB/SP
SP= Spanning Tree
TB/SP
TB/SP
F
B
TB/SP
F
BPDUs
BPDUs
BPDUs
BPDUs
Set SP’s Translation Bridge
Enable parameter to Enable
TB
Root
TB
Bridge
TB/SP TB/SP
BRG0025A
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