netdev - Re: Missing TCP SYN on loopback, retransmits after 1s

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Message-ID: <1322028540.1298.8.camel@edumazet-laptop>
Date:	Wed, 23 Nov 2011 07:09:00 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	John Heffner <johnwheffner@...il.com>
Cc:	Jesse Young <jlyo@...o.org>, netdev@...r.kernel.org
Subject: Re: Missing TCP SYN on loopback, retransmits after 1s

Le mercredi 23 novembre 2011 à 06:58 +0100, Eric Dumazet a écrit :

> First connection went well.
> 
> Now we try to reuse tuple  (ports 49374, 8009 on loopback) while a socket is in TIMEWAIT, and first
> SYN packet (time 06:48:20.337335) is dropped (considered as a packet part of previous session)
> 
> Now why the first SYN packet is dropped and not the second one, I dont know yet.


in netstat -s output, the suspect increasing counter is :

"45 congestion windows recovered without slow start after partial ack"



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