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Configure bridge IRB/CRB on the same interfaces?

I try to configure routing and bridging at the same time from interface fa0/0 to interface pos0/0. Is that possible in general?

Cisco Employee

Re: Configure bridge IRB/CRB on the same interfaces?

First of all, when configuring IRB and CRB, a protocol can be at the same time bridged and routed on the router. Though, it can only be bridged or routed on an interface. You cannot do both at the same time. Another thing is that a protocol can be bridged on an interface while another protocol is routed on that same interface.

If we take IP for instance, you could bridge it between Fa1/0 and Fa1/1 and route it between Pos2/0 and Pos3/0 for instance. You could then decide to route it between the Pos interfaces and the BVI interface linked to the bridge-group configured on the 2 Fast-ethernet interfaces (if you use IRB instead of CRB).

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