I can think of two ways to attack this:
1. Make sure the round robin DNS is rapidly update if one of the servers
goes down.
2. run a proxy at each site which in the event of failure of the web
server (at that site) will take the web servers IP address, listen on
the same port but then forward the request to the other server that still
lives.
In both cases you must monitor the web server to see if it goes down,
there is an abundance of web pinging tools around.
The DNS update version is more traffic friendly (unless the proxy cached
and the web site had plenty of static content in which case you would
still retain some load balancing)
If you do not have direct control of the DNS server the proxy option
may be easier to keep an eye on.
The proxy server could monitor the local web server itself. In the event
of the server dying it can change it's own ifconfig. Less steps in the
way to go wrong than updating a remote DNS server.
Cheers,
Robin.
Robin Pollard
This .sig for rent
---- "Webmaster" <[EMAIL PROTECTED]> wrote:
> To all,
> Please apply some of your gray matter to my problem :)
>
> Scenario, different locations, different companies managing a T1 into
> each
> location. Main web server sits at one location, back-up at another.
> No
> connection between each machine other than the T1 to the internet.
>
> Round Robin makes 50% of hits go to each web server. But if one is
> unavailable, 50% of folks get can't reach the host. Not acceptable.
>
> Question: How do I have packets go to main web server, then if main
> web
> server is un-reachable (for any reason) the packets are automatically
> routed
> to the back-up machine? (Which is up 24/7 waiting)
>
> This is pretty urgent, and help/guidance/flames would be appreciated
> greatly!
>
> Later,
> Michael Sorbera
> Webmaster
> Randolph-Brooks Federal Credit Union
> "In the land of the clueless, he who has half a clue is King!"
> (i don't profess to even have half a clue!)
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