[c-nsp] Same IP on two interfaces?

[Robert Blayzor]

Vincent De Keyzer wrote:
> Hi list,
> 
>  
> 
> is it possible to have the same IP on two interfaces ?
> 
>  
> 
> The scenario is the following: router is connected via Fa0/0 to sw0, and via
> Fa0/1 to sw1 (sw0 and sw1 are interconnected). 
> 
>  
> 
> IP X.Y.Z.100 should belong to both interfaces: if sw0 or sw1 fails, router
> should still be reachable.


Three ways to do this...

1)  On a switch use an SVI on a VLAN both interfaces exist on.

2)  Backup interface.

3)  A BVI.  Bridge both interfaces into a bridge-group and number the
    IP address on the BVI interface.

-- 
Robert Blayzor, BOFH
INOC, LLC
rblayzor\@(inoc.net|gmail.com)
PGP: 0x66F90BFC @ http://pgp.mit.edu
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When all else fails, let a = 7.  If that doesn't help, then read the manual.