failover and load balancing

[Kanwar Ranbir Sandhu]

Hello Everyone,

I'm stepping into the world of Freeradius for the first time - holy shit
is there a lot to learn.

Anyway, I've been wondering how many servers are required to have a
proper (i.e. no single point of failure) on the freeradius side of
things.  I know that I can have one freeradius server proxying requests
to any number of authorization and/or accounting servers - great.  But,
what if I don't want to proxy and only want two freeradius servers that
do auth, and two separate servers for accounting?  I can conceptualize a
cluster or even simple fail over using heartbeat for the database bit.
What I don't understand is how the failover and load balancing is done
on the freeradius level (i.e. for auth) and still enter a single IP for
freeradius on the NAS.

Am I supposed to configure a virtual server on the first freeradius
server, copy the config to the second machine, and then use that virtual
server IP on the NAS?  I don't get it.  I must be missing something.

Any help would be appreciated.

Regards,

Ranbir

-- 
Kanwar Ranbir Sandhu
Linux 2.6.27.21-170.2.56.fc10.x86_64 x86_64 GNU/Linux 
13:45:51 up 3 days, 13:42, 3 users, load average: 1.07, 0.61, 0.50