route and bridge one mac address

[gnijs]

Hello,

I have a particular problem: on a router with one in and one out interface, i want to route all traffic, but i want to bridge one specific well-known MAC address. I wonder if this is possible. On a cisco router, I can do IRB, but each interface is either routed or bridged, but not mixed.

I am sure it will work if i put a switch before and after the router and connect the router with double interfaces: 2 inbound and 2 outbound. Then route on one pair of interfaces and on the second pair of interfaces, bridge the interfaces with a bridge MAC address filter. However, i wonder if it can be done on less interfaces (2 or 3)....

regards,

Geert

[Bilal Nawaz]

Hello Geert,

Maybe bridging sub-interfaces? Might work, i have not tried myself to be honest and am no expert in bridging with router interfaces. I think config would look something like this...

conf t

bridge irb

!

interface e0/0.100

encapsulation dot1q 100 native

bridge-group 100

!

interface e0/1.100

encapsulation dot1q 100 native

bridge-group 100

exit

bridge 100 protocol ieee

bridge 100 bridge ip

bridge 100 route ip

bridge 100 address H.H.H [Where H.H.H is mac address you want to bridge]

hth

Bilal

CCIE #45032