Re: Transperant HTTP Redundancy.

From: Goncalo Valverde <>
Date: Wed, 25 Mar 1998 10:37:16 -0000 (WET)


On 25-Mar-98 Javier Puche. CSIC RedIRIS wrote:
> - Have both machines with IP addresses different than x.x.x.x but with
> the ability to listen to x.x.x.x with a virtual interface when needed.
> - When machine 1 attending x.x.x.x falls down, have the other machine
> (2) detect that situation and set up a virtual interface for attending
> x.x.x.x , do it also the other way around.
> - Make sure that if either machine goes up again doesn't listen to IP
> x.x.x.x before checking that the other machine is not doing that
> already.

 Theres an url explaining that somewhere... but the problem is that this kind
of solution is not bulletproof.. imagine that for some reason the kernel panics
with an harddisk failure.. sometimes when this happens the machine still
replies to pings, squid is up and running, but obviously doesnt replies to
requests.. so you could grab the ip address because the other machine is still
using it... or is there any way around this problem?

\       Esoterica - Novas Tecnologias de Informacao, SA 
:-)     Gonšalo Valverde , Dpto de Infraestrutura de Rede 
        ISP Oficial Lusitania 75
Received on Wed Mar 25 1998 - 02:40:26 MST

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