[Serdev] Concept for a SIP cluster implementation

[Greger V. Teigre]

> I don't want to use SRV, not only because of the NAT problem but also 
> because most of the SRV implementations in UACs I've seen so far are 
> broken, if implemented at all.
>
> So each edge proxy will be set up with a hot-standby proxy for IP 
> failover, so there's no need for a failover mechanism in the UAC (to be as 
> much independent from it as possible).

And back to one of my favorite topics: Avoid idle hardware.  Andreas, you 
talked about either linux ha or quagga and bgp as failover mechanisms.  Is 
there a way to combine a hot and a standby server in the same physical 
server (without vmware/xen)?

> If the first edge proxy pair (say sip1.my.domain) get's to a limit 
> regarding ressources, you can add a second pair and propagate the new 
> hostname (sip2.my.domain) to new customers.

And of course, if you do happen to have UACs with good SRV support, you can 
use that :-)
g-)