Dear Colin, Thanks for your reply. I am happy with this change. Are others happy with this change or any more suggestions regarding keep-alives? Arjuna -----Original Message----- From: Colin Perkins [mailto:csp@xxxxxxxxxxxxx] Sent: 21 March 2007 13:20 To: Arjuna Sathiaseelan Cc: 'DCCP mailing list' Subject: Re: RTP over DCCP - Probing.. Arjuna, On 20 Mar 2007, at 19:27, Arjuna Sathiaseelan wrote: > Dear Colin, As discussed during the meeting, I would like to > remind you that the following paragraph from Section 4.1 (http:// > www.ietf.org/internet-drafts/draft-ietf-dccp-rtp-04.txt) requires a > sentence or two stating that the probing mechanism described is > under the assumption that the underlying DCCP mechanism does not do > any probing. If the underlying CCID does probing (for eg Faster > Restart), then please state what the sender should do or could > do. "A DCCP connection is opened when an end system joins an RTP > session, and it remains open for the duration of the session. To > ensure NAT bindings are kept open, an end system SHOULD send a > zero length DCCP- Data packet once every 15 seconds during > periods when it has no other data to send. This removes the need > for RTP no-op packets [18], and > similar application level keep-alives, when using RTP over > DCCP ". Would a change similar to the following suffice? -->cvs diff -c rtp-over-dccp.xml Index: rtp-over-dccp.xml =================================================================== RCS file: /Users/csp/CVS/rtp-over-dccp/rtp-over-dccp.xml,v retrieving revision 1.82 diff -c -r1.82 rtp-over-dccp.xml *** rtp-over-dccp.xml 4 Mar 2007 18:50:40 -0000 1.82 --- rtp-over-dccp.xml 21 Mar 2007 13:17:18 -0000 *************** *** 153,159 **** packet once every 15 seconds during periods when it has no other data to send. This removes the need for <xref target="I-D.wing-avt-rtp- noop"> RTP no-op packets</xref>, and similar application level keep- alives, ! when using RTP over DCCP. </t> <t> RTP data packets MUST obey the dictates of DCCP congestion control. In some cases, the congestion control will require a sender to send --- 153,161 ---- packet once every 15 seconds during periods when it has no other data to send. This removes the need for <xref target="I-D.wing-avt-rtp- noop"> RTP no-op packets</xref>, and similar application level keep- alives, ! when using RTP over DCCP. This application level keepalive does not ! need to be sent if it is known that the DCCP CCID in use provides a ! transport level keepalive. </t> <t> RTP data packets MUST obey the dictates of DCCP congestion control. In some cases, the congestion control will require a sender to send -- Colin Perkins http://csperkins.org/
