I'm with the consensus o this. There are other ways to get failover and 
load sharing solutions that avoid the problems. How about multiple DNS 
entries that alternate/cycle IP responses.
Do the other machine _really_ care if the IP is the same?
G.
On Wed, 31 Jan 2007, Bond, Peter wrote:
> Date: Wed, 31 Jan 2007 09:49:42 -0000
> From: "Bond, Peter" <PBond@???>
> Reply-To: Hampshire LUG Discussion List <hampshire@???>
> To: Hampshire LUG Discussion List <hampshire@???>
> Subject: [Hampshire] One box, 2 NICs - but with the same MAC address
> 
> The idea makes me cringe, but someone has decided that it would be a 
> "good" idea (for certain values of good) to have 2 network ports on 
> the same system with the same MAC & IP addresses (well, they'll never 
> be on the same physical network)...  I don't think this is sane, 
> sensible or conforming to general networking principles; am I being 
> fair to refuse it?  I can see all sorts of problems, and I maintain 
> that it is the responsibility of an upstream router to perform any NAT 
> that is required (along with the redundancy switching).
> 
> And if I'm being more-than-usually unreasonable, is there a way of 
> achieving it without rewriting chunks of the stack?
> 
> Peter
> 
> **********************************************************************
> 
> This email, its content and any attachments is PRIVATE AND 
> CONFIDENTIAL to TANDBERG Television. 
> If received in error please notify the sender and destroy the original 
> message and attachments.
> 
> www.tandbergtv.com
> **********************************************************************
> 
> --
> Please post to: Hampshire@???
> Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire
> LUG URL: http://www.hantslug.org.uk
> --------------------------------------------------------------
> 
-- 
Gordon Scott                  http://www.gscott.co.uk
        Linux ... Because I like to *get* there today.