Re: SSM, RTCP, SAP

[Mark Handley <mjh@aciri.org>]

>At 09:36 PM 4/19/2001 +0100, Tony Ballardie wrote:
>>Similarly, what about (global) SAP?
>
>SAP was developed before the web.  I believe the web makes SAP obsolete, so 
>we shouldn't worry about supporting it as a special case.

I don't think SAP is completely obsolete, but I also don't think it's
very useful for global groups.  SAP is best used for admin-scoped
multicast groups, where you want the people who can receive the
session to be the only people who receive the announcement.  The web
can't easily satisfy this requirement.

Admin-scoping doesn't apply for SSM, and I don't think SAP is relevant
for SSM either. For SSM groups, using RTSP/SDP or HTTP/SDP makes much
more sense.

 - Mark