From: "Jesper Juhl" <jesper.juhl@gmail.com>
To: "Simon Peter" <simon.peter@gmx.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: sysctl_tcp_keepalive_time
Date: Thu, 16 Aug 2007 13:23:19 +0200 [thread overview]
Message-ID: <9a8748490708160423g4ae218a3v7738f2c6399369e9@mail.gmail.com> (raw)
In-Reply-To: <20070816125526.9a895d09.simon.peter@gmx.de>
On 16/08/07, Simon Peter <simon.peter@gmx.de> wrote:
> Hi,
>
> is there any reason why sysctl_tcp_keepalive_time (reflected
> by /proc/sys/net/ipv4/tcp_keepalive_time) is set to 7200 seconds? Is
> this specified somewhere?
>
RFC 1122, section 4.2.3.6 - http://www.faqs.org/rfcs/rfc1122.html
"
4.2.3.6 TCP Keep-Alives
Implementors MAY include "keep-alives" in their TCP
implementations, although this practice is not universally
accepted. If keep-alives are included, the application MUST
be able to turn them on or off for each TCP connection, and
they MUST default to off.
Keep-alive packets MUST only be sent when no data or
acknowledgement packets have been received for the
connection within an interval. This interval MUST be
configurable and MUST default to no less than two hours.
"
This page may also be of interrest to you :
http://www.uic.rsu.ru/doc/inet/tcp_stevens/tcp_keep.htm
Also see "man 7 tcp"
--
Jesper Juhl <jesper.juhl@gmail.com>
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please http://www.expita.com/nomime.html
prev parent reply other threads:[~2007-08-16 11:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-16 10:55 sysctl_tcp_keepalive_time Simon Peter
2007-08-16 11:23 ` Jesper Juhl [this message]
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