[Serdev] Concept for a SIP cluster implementation

[Jan Janak]

On 27-09-2005 15:33, Andreas Granig wrote:
> Klaus Darilion wrote:
> >So, we just have to make ser call-stateful first :-)
> 
> Yes. Any volunteers? ;o)
> 
> >>I'd say it's much easier to handle if the outbound proxy equals the 
> >>registrar from the UACs point of view. So the UAC always sends all 
> >>requests to the same edge proxy, which then splits up REGISTERs from 
> >>other requests and forwards them to the appropriate server.
> >
> >
> >Of course it would be much easier. How will you handle load blalancing 
> >between the edge proxies? SRV? If you use SRV, the clients are free send 
> >the request to whatever edge proxy. RFC 3263 says to use SRV lookup for 
> >each transaction.
> 
> 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.

  I think that it is getting better and most UAs support SRV these days.
  The only missing piece seems to be proper SRV failover.
 
    Jan.