Re: Using DNS for SSM

[Ross Finlayson <finlayson@live.com>]

At 04:11 PM 2/15/01, Dino Farinacci wrote:
> >> Can someone explain to me what the urgent need for SSM specific
> >> channel addresses is ? I agree that it is a nice-to-have,
>
>     I don't see any urgency. What gave you that idea?

My reading of Toerless's message was that he was questioning the "need" at 
least as much as the "urgency".

As Toerless noted, knowing a SSM channel address (S,G) alone doesn't tell 
you much.  In order to be able to usefully receive the session, you still 
need additional information telling you something about the properties of 
the session (what media, what port(s), what format(s), etc.).  In other 
words, you need the SDP description.

Since we already have ways of delivering SDP descriptions (e.g., using 
HTTP, returning the application/sdp MIME type), and already have a way of 
describing SSM sessions (S,G, and everything else) in SDP, then why do we 
need to be able to look up SSM (S,G)s using DNS?

         Ross.