> I know that in one SUN machines with two ethernet cards I can put 1 VIP
> an 2 Ips (in the different ethernet cards) so in case one ethernet card
> fails the VIP will use the other one.

IPMP does that.

> Is there the same architecture but
> with different machines having 1 VIP in one machine and in case that
> machine fails go to the other one?

Depends on what's behind the IP.  Usually you need that process to fail
over as well.

If you don't (you're just sharing an IP), an external load balancer is
usually the best way to handle it.  Have it forward to either machine if
they're both up.  It'll send only to one if there's a failure.

Otherwise you're looking at some type of cluster configuration.  A
cluster has the information to migrate a single VIP between hosts,
usually with a service behind it (like a database).  

-- 
Darren Dunham                                           [EMAIL PROTECTED]
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
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