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From: Octavian Purdila <opurdila@ixiacom.com>
To: Rick Jones <rick.jones2@hp.com>
Cc: netdev@vger.kernel.org
Subject: Re: TCP timewait recycle/reuse for IPv6?
Date: Mon, 17 Mar 2008 20:04:33 +0200	[thread overview]
Message-ID: <200803172004.33246.opurdila@ixiacom.com> (raw)
In-Reply-To: <47DEADC1.1040908@hp.com>

On Monday 17 March 2008, Rick Jones wrote:
> Octavian Purdila wrote:
> > Hi,
> >
> > Is there a way to prevent getting bind(in6addr_any) failures when we
> > have lots of TIMEWAIT sockets hanging around? It looks like timewait
> > reuse/recyle is not supported in the IPv6 stack.
>
> What is the definition/value of "lots" here?
>

At least 26000, maybe even more. I suspect that when I get the bind failures 
most of the ports in the ip_local_port_range pool are in TIMEWATstate. 

This happens because of the particular traffic I am using, which generates a 
few 1000s of connections per second. The connection lifetime is very short.

While running the same traffic with IPv4, the timewait recyle/reuse features 
kicks in and keeps the number of TIMEWAIT sockets to under a 1000.

Thanks,
tavi





  reply	other threads:[~2008-03-17 18:04 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-17 16:18 TCP timewait recycle/reuse for IPv6? Octavian Purdila
2008-03-17 17:43 ` Rick Jones
2008-03-17 18:04   ` Octavian Purdila [this message]
2008-03-17 18:15     ` Rick Jones
2008-03-17 19:11       ` David Miller
2008-03-17 19:10     ` David Miller
2008-03-18  5:27       ` Bill Fink

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