nanog mailing list archives
Re: TCP congestion
From: Stephen Wilcox <steve.wilcox () packetrade com>
Date: Thu, 12 Jul 2007 21:09:24 +0100
Well, if its out of order its the same as if its lost or delayed, it needs to see that missing segment before the window is full As mentioned you need to get dumps from both ends, you will almost definitely find that you have packet loss which tripped tcp's slow start mechanism. Steve On Thu, Jul 12, 2007 at 12:02:49PM -0700, Philip Lavine wrote:
Even if the segment was received out of order what would cause congestion avoidance to starve the connection of legitimate traffic for 15 to 20 seconds? That is the core of the problem. ----- Original Message ---- From: Fred Baker <fred () cisco com> To: Brian Knoll <Brian.Knoll () tradingtechnologies com> Cc: Philip Lavine <source_route () yahoo com>; nanog <nanog () merit edu> Sent: Thursday, July 12, 2007 11:56:06 AM Subject: Re: TCP congestion On Jul 12, 2007, at 11:42 AM, Brian Knoll ((TTNET)) wrote:If the receiver is sending a DUP ACK, then the sender either never received the first ACK or it didn't receive it within the timeframe it expected.or received it out of order. Yes, a tcpdump trace is the first step. ____________________________________________________________________________________ Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545469
Current thread:
- TCP congestion Philip Lavine (Jul 12)
- RE: TCP congestion Brian Knoll (TTNET) (Jul 12)
- Re: TCP congestion Fred Baker (Jul 12)
- Re: TCP congestion Jared Mauch (Jul 12)
- Re: TCP congestion Valdis . Kletnieks (Jul 12)
- RE: TCP congestion michael.dillon (Jul 12)
- Re: TCP congestion Joe Loiacono (Jul 12)
- Re: TCP congestion Jay Hennigan (Jul 12)
- Re: TCP congestion Warren Kumari (Jul 13)
- <Possible follow-ups>
- Re: TCP congestion Philip Lavine (Jul 12)
- Re: TCP congestion Stephen Wilcox (Jul 12)
- Re: TCP congestion Philip Lavine (Jul 12)
- RE: TCP congestion Brian Knoll (TTNET) (Jul 12)
- Re: TCP congestion Iljitsch van Beijnum (Jul 12)
- Re: TCP congestion Stephen Wilcox (Jul 12)
- Re: TCP congestion Kevin Loch (Jul 12)
- Re: TCP congestion Joel Jaeggli (Jul 12)
- Re: TCP congestion Leigh Porter (Jul 12)
- RE: TCP congestion Brian Knoll (TTNET) (Jul 12)