how to configure transparent bridging over frame-relay

Unanswered Question
Apr 26th, 2006
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Hi,

My company network is running transparent bridging protocol over frame relay wan link. Does anybody know how to configure redundancy for this protocol. Here is my scenerio:

I have 2 routers at Head Quarter (router 1 is primary, and router 2 is backup). 1 router at the site (router 3). Their configuration as below:


Router 1:


Interface s0/0/0

encapsulation frame-relay

no ip address

Interface s0/0/0.1 point-to-point

description primary link to site

ip address 10.10.1.1 255.255.255.0

frame-relay interface-dlci 110

bridge-group 1


Router 2:


Interface s0/0/0

encapsulation frame-relay

no ip address

Interface s0/0/0.1 point-to-point

description backup link to site

ip address 10.10.2.1 255.255.255.0

frame-relay interface-dlci 210

bridge-group 1

Router 3:


Interface s0/0/0

encapsulation frame-relay

no ip address

Interface s0/0/0.1 point-to-point

description primary link to Head Quarter

ip address 10.10.1.2 255.255.255.0

frame-relay interface-dlci 100

bridge-group 1

Interface s0/0/0.2 point-to-point

description backup link to Head Quarter

ip address 10.10.2.2 255.255.255.0

frame-relay interface-dlci 200

bridge-group 1


How do I configure to force Bridging traffic to use primary link only, and if primary link fail, then it would use the backup link?

Thanks.

Tung.


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sundar.palaniappan Wed, 04/26/2006 - 11:52
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Tung,


Configure the following:


Router 1:

bridge 1 priority 8192


Router 2:

bridge 2 priority 16384


This would make Router1 to be the root bridge and Router2 as the fallback root. R3 would put the pvc to R1 in forwarding state and the one to R2 in blocking state.


Pls. rate all helpful posts.


Sundar


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