[Tsvwg] sack draft reset
Mark Allman <mallman@grc.nasa.gov> Tue, 23 July 2002 06:04 UTC
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To: tsvwg@ietf.org
Cc: Ethan Blanton <eblanton@prime.cs.ohiou.edu>, kfall@cs.berkeley.edu
From: Mark Allman <mallman@grc.nasa.gov>
Reply-To: mallman@grc.nasa.gov
Organization: BBN Technologies/NASA GRC
Song-of-the-Day: King of the Hill
Date: Mon, 22 Jul 2002 08:55:09 -0400
Subject: [Tsvwg] sack draft reset
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Folks- There have been a lot of good comments on the SACK I-D on the list recently. We have used those comments as fodder for an updated version. I just submitted -12 and it should appear in the archives soon. You can also slurp a copy from: http://roland.grc.nasa.gov/~mallman/papers/draft-allman-tcp-sack-12.txt We are not presuming this will be the final version of the document. What we hope this version does is to re-sync everyone so that we are all on the same page again. The major changes since rev -11: + We explcitly state that the firing of the RTO terminates the loss recovery algorithm specified in the draft. + We explcitly state that after the RTO fires you cannot use the SACK-based algorithm until the cumulative ACK point covers RecoveryPoint. (There could still be some disagreement on this point, but following everyone's conversations was hard and so if you disagree with this, please send a concise explanation so we can all consider it.) + The SetPipe() stuff has been re-written (again!). Basically we changed the philosophy. The old scheme looks at the outstanding sequence space and then tries to subtract off the things that left the network. The new scheme just iterates through the sequence space counting the number of times a segment is still considered in the network (i.e., counts pipe rather than deriving it). This seems like a more straightforward way to go -- it is easier to follow and comes up with a better estimate. As always, we are very interested in comments from the WG. Thanks! allman -- Mark Allman -- BBN/NASA GRC -- http://roland.grc.nasa.gov/~mallman/ _______________________________________________ tsvwg mailing list tsvwg@ietf.org https://www1.ietf.org/mailman/listinfo/tsvwg
- [Tsvwg] sack draft reset Mark Allman