At 09:51 PM 1/7/2003 -0800, Mark Baugher wrote:
Steve, At 03:20 PM 1/7/2003 -0800, Stephen Casner wrote:It has been awhile since I read the SSM I-Ds, but this does not sound right to me. I scanned the documents in http://www.ietf.org/html.charters/ssm-charter.html and cannot find anything about multicast receivers being prevented from sending multicast packets (a multicast sender is also a receiver, right?).One of the IESG comments (this one from Harald Alvestrand) was a request to add the following "non-normative note" at the end of Section 6 where RTCP is introduced (i.e., just before 6.1). Does anyone object? Non-normative note: In the multicast routing approach called Source-Specific Multicast (SSM), only one or a few senders send multicast data, and receivers may not send multicast.
excuse me, a sender that joins/subscribes to (S,G) is also a receiver. Mark
SSM defines an (S,G) "channel" that allows receivers to select certain senders to group G. I don't know where it is specified that receivers may not send multicast.
Mark
The recommendations here accommodate SSM only through Section 6.2's option of turning off receivers' RTCP entirely. Future work will specify adaptation of RTCP for SSM so that feedback from receivers can be maintained. -- Steve _______________________________________________ Audio/Video Transport Working Group avt@ietf.org https://www1.ietf.org/mailman/listinfo/avt_______________________________________________ Audio/Video Transport Working Group avt@ietf.org https://www1.ietf.org/mailman/listinfo/avt
_______________________________________________ Audio/Video Transport Working Group avt@ietf.org https://www1.ietf.org/mailman/listinfo/avt