Jonathan Rosenberg wrote:
> > -----Original Message-----
> > From: James Undery [mailto:[EMAIL PROTECTED]]
> > This is a matter for you, however, if you don't ensure you
> > use the same A
> > record for same transaction you will break the simple load
> > balancing on a
> > number of proxies including your own (IIRC ;^) ).
>
> Actually, draft-ietf-sip-srv spec does discuss this:
>
> >Clients MUSTNOT cache query results except according to the rules in
> > RFC 1035 [5].
>
> The rules here, of course, allow the resolver to cache DNS query results.
> The point is that DNS caching in SIP is just standard DNS caching.
That said I don't know many widely available implementations that allow SRV
lookups which means that implementors need to process the SRV records if you
do this for every retransmission you are in trouble, SRV seems better suited
to load balancing with connection oriented protocols (which in turn requires
stateful SIP proxies). The caching of results seems to apply more to the A
records you get from the CNAME records (or what ever the SRV record refers
to).
James Undery
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