[c-nsp] Same IP on two interfaces?

[Mark D. Nagel]

Vincent De Keyzer wrote:
>> If you are using router 1700/2600/2800/3600/3700/3800 you could use
>> Ethernet
>> Switch  (ESW) Module/card . Configure vlan access mode to connected ports,
>> and configure SVI / interface vlan which is using single IP address. It's
>> just like a switch.
>>     
>
> It's a 7206VXR...
>
>   
A little late on the reply here, but you can do this on your router with
IRB (integrated routing and bridging) and a BVI interface.  Sample:

bridge 1 ieee
bridge irb
bridge 1 route ip

interface Fa0/0
  bridge-group 1
  no ip address

interface Fa0/1
  bridge-group 1
  no ip address

int BVI1
  ip address x.x.x.x m.m.m.m

This has not been live tested -- from memory, but should be pretty darn
close.  The router will now be accessible to devices on the Fa0/0 and
Fa0/1 VLAN as x.x.x.x.  BVI1 is now the L3 interface to the router from
that network.

Good luck!

Mark

-- 
Mark D. Nagel, CCIE #3177 <mnagel at willingminds.com>
Principal Consultant, Willing Minds LLC (http://www.willingminds.com)
tel: 714-630-4772, fax: 949-623-9854, fwd: 680979