Subject: [MMUSIC] In BUNDLE negotiation, when do "IDENTICAL" attributes need to be identical?

From: Taylor Brandstetter <[email-masked]>
Date: Mon, 14 Dec 2015 15:46:36 -0800

I'm referring to "IDENTICAL" as defined by this draft:
https://datatracker.ietf.org/doc/draft-ietf-mmusic-sdp-mux-attributes

The definition is:

   Attributes and their associated values (if any) that MUST be
   identical across all the media descriptions being multiplexed.

However, it's not clear to me at what point in BUNDLE negotiation this
restriction starts to apply. Is it:

1. When an offer first proposes a BUNDLE group
2. When an answer accepts a BUNDLE group
3. When a subsequent offer is made, with an already-established BUNDLE group