Load balancing, setting up 2 IP addresses for the same website...

[David Botham]

bind-users-bounce at isc.org wrote on 09/07/2004 01:29:02 AM:
> Hi
> 
> i was just wondering how www.yahoo.com gives 7-8 IP addresses on a
> nslookup query? This does mean that they have some sort of load
> balancing implemented. If a query for www.yahoo.com is from asia it
> goes to another server, if from europe it goes to another....
> 
> How do they do this? I have a website hosted and i want to do
> something of the same sort. For a start i want to set up my server to
> give services from 2 subnets....i mean to say that i have radio
> connectivity with 2 ISPs. At the moment i have a primary LINK and a
> backup link. what i want to do is utilize both the links at the same
> time and create a load balancing scenario. I hope i am making my point
> clear. I want to set up two LAN cards with differnt IP addresses from
> the 2 ISPs and then somehow create the situation where both are active
> at both times.

What you are looking for is a link loadbalancer.  There are three main 
players in that market from a commercial product perspective:

RadWare Linkproof
F5 LinkController
FatPipe

With all of them you will need control of your external DNS on name 
servers that you control.


Dave... 




> 
> What do i do? Plz guide...
> 
> Thanx...
> 
> Umar
>