Host with Multiple IPS

[Barry Margolin]

In article <37DECE4E.70E6B03D at gbl.com.br>,
Rodrigo Meirelles  <rodrigo at gbl.com.br> wrote:
>    I have 3 web servers identically in my domain eclipse.com.br.
>I have put in my db file 3 entries :
>
>www    IN    A    x.y.w.z
>www    IN    A    x.y.w.z2
>www    IN    A    x.y.w.z3
>
>3 different IP addresses. It's working without problem, i hope it's not
>wrong or implicate in anything, am i wrong ?

That's the normal way to get load sharing.

>I want it to work that way :
>
>It will just get x.y.w.z as the result of the search, but if this site
>went down, the x.y.w.z2 will answer...and so the others.

Round robin will cause the records to be given out in a different order
each time.  So some clients will get x.y.w.z as the result, others will get
x.y.w.z2, and others will get x.y.w.z3.

Whether they automatically try additional addresses if their connection
fails is up to the implementor of the browser.  Some browsers may try
multiple addresses, but I suspect most don't.

If you want automatic, transparent failover, use something like Cisco Local
Director.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
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