Wednesday, March 15, 2006

 

Bridging Ethernet segments over Frame Relay. (Question #39)

Consider two routers connected via a frame relay link in order to bridge ethernet segments connected to the ethernet interfaces of each of the routers across that frame relay link. With the configuration shown below for each of the routers, bridging across frame relay does not work. Hosts connected to the ethernet interfaces of the two routers are unable to ping each other. The frame relay connection has itself been verified to be working fine.

Router1

no ip routing
!
interface Ethernet0/0
no ip address
no keepalive
bridge-group 1
!
interface Serial2/0
no ip address
encapsulation frame-relay
frame-relay interface-dlci 204
bridge-group 1
!
bridge 1 protocol ieee


Router2

no ip routing
!
interface Ethernet0/0
no ip address
no keepalive
bridge-group 1
!
interface Serial2/0
no ip address
encapsulation frame-relay
frame-relay interface-dlci 402
bridge-group 1
!
bridge 1 protocol ieee


What needs to be done to get the bridging to work correctly?

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