[Sip] PING/PONG
"Christian Stredicke" <Christian.Stredicke@snom.de> Mon, 08 November 2004 21:55 UTC
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Date: Mon, 08 Nov 2004 22:31:15 +0100
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From: Christian Stredicke <Christian.Stredicke@snom.de>
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Subject: [Sip] PING/PONG
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Hello Cullen, I think it is no harm if there is a PING message defined in SIP. I personally think it is overdue anyway. Implementors can then decide if they are using it or not. Lets leave that decision to the implementors! But we have to consider who is sending keep-alive traffic. "IMHO" is it definitely better if the UA does this, because then e.g. usually it is ok to send CRLF keep alive or STUN. We register with a header that incates (a) that the UA is able to do the refreshing and (b) what the proposed refresh time is. The UA can do all these tricky NAT measurement tricks and then propose the refresh time. Stupid UA may just propose a predefined value, e.g. 20 seconds. The registrar (or whatever is in the path) then can acknowlege the refresh role and leave the refreshing to the UA. Otherwise, it will send the refresh messages. In that case, it will probably use PING, cause it needs a response to keep the NAT alive in all cases - even if it is a "503 Not Implemented". Christian
_______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors@cs.columbia.edu for questions on current sip Use sipping@ietf.org for new developments on the application of sip
- [Sip] PING/PONG Christian Stredicke
- RE: [Sip] PING/PONG Christer Holmberg (JO/LMF)
- RE: [Sip] PING/PONG Steve Langstaff
- Re: [Sip] PING/PONG Bob Penfield
- RE: [Sip] PING/PONG Christer Holmberg (JO/LMF)
- RE: [Sip] PING/PONG Christian Stredicke
- Re: [Sip] PING/PONG Bob Penfield
- RE: [Sip] PING/PONG Chris Boulton
- RE: [Sip] PING/PONG Christian Stredicke
- RE: [Sip] PING/PONG Steve Langstaff
- RE: [Sip] PING/PONG Christian Stredicke
- RE: [Sip] PING/PONG Chris Boulton
- RE: [Sip] PING/PONG Steve Langstaff
- Re: [Sip] PING/PONG Spencer Dawkins
- RE: [Sip] PING/PONG Christian Stredicke
- Re: [Sip] PING/PONG Klaus Darilion
- Re: [Sip] PING/PONG Jonathan Rosenberg
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- RE: [Sip] PING/PONG Christian Stredicke
- Re: [Sip] PING/PONG Jonathan Rosenberg
- RE: [Sip] PING/PONG Steve Langstaff
- RE: [Sip] PING/PONG Christian Stredicke
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- Re: [Sip] PING/PONG Jonathan Rosenberg
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- Re: [Sip] PING/PONG Jonathan Rosenberg
- Re: [Sip] PING/PONG Robert Sparks
- Re: [Sip] PING/PONG Jonathan Rosenberg
- Re: [Sip] PING/PONG Robert Sparks
- Re: [Sip] PING/PONG Jonathan Rosenberg
- Re: [Sip] PING/PONG Robert Sparks
- Re: [Sip] PING/PONG Jonathan Rosenberg
- Re: [Sip] PING/PONG Robert Sparks