Presence and IntComm WG

[Steve Blair <>]

Candace:

 Based on past conversations about SIP.edu I use the SRV name
_sip._udp.upenn.edu. This is not the domain name in my email
address (which is used by PALs) nor is it the domain name for
our VoIP proxy. That is kinda why I am asking. It just seems to
me that the domain names should "line up" at some point to make
cross-environment SIP routing work.

-Steve

Candace Holman wrote:

> It's the SRV record that makes the domains work.  You can have a SRV 
> record without an A record.  It doesn't have to be resolvable as an A 
> record.  Your SRV record is _sip._udp.isc.upenn.edu  Are you using 
> something different for sip.edu?  I may be misunderstanding the issue, 
> just ignore me if so.
>
> Candace
>
> At 03:51 PM 2/11/2005, Steve Blair wrote:
>
> >  Has anyone thought about the impact of domain names on
> > SIP routing, especially inter-institution?
> >
> >  I noticed that eyebeam, and others, append the locally configured
> > SIP domain name to an outgoing "called number". This is fine
> > if that domain name is "resolvable". What happens when local
> > SIP proxies, SIP.edu proxies and now the PALs proxy all
> > interact?
> >
> >  During the test call with Candace I noticed some missed calls
> > to 
> >
> >  and outbound calls had this same domain
> > name appended. This domain name is not resolvable.
> >
> >  Our SIP.edu domain is trying to follow the architectural direction
> > of using <userid>@<institution-name>.edu. Our VoIP proxy is
> > known by yet another domain and PALs uses my email address.
> >
> >   I know we can use the alias command in SER to handle domain
> > names as long as userids are understood. I am just curious what
> > others think about this issue?
> >
> > -Steve