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Date:      Mon, 9 Jul 2001 23:05:13 +0100
From:      Richard Smith <rdls@satamatics.com>
To:        net@freebsd.org
Subject:   sysctls keepidle and keepintvl
Message-ID:  <20010709230512.A918@gaia.home.rdls.net>

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Please cc me, as I'm not on this list.

I am using 4.3-RELEASE, and investigating why I don't see
any keepalives (using tcpdump) on my connections.

The default values are as follows:
	net.inet.tcp.keepidle = 7200000
	net.inet.tcp.keepintvl = 75000

It seems to me that the keepalive interval is being set
by keepidle, thus setting keepidle = 20000, generates 
keepalives at 20s intervals.

Looking at the comments in tcp_var.h, it should be 
keepintvl that sets this interval. Otherwise, why
have such a large value for keepidle?

Is this a bug? Or have I missed something,

Many thanks,
Rich.

-- 
Richard Smith
Network Systems Director
Satamatics Ltd
Green Lane, Tewkesbury, GL20 8HD, United Kingdom
Tel: +44 1684 278610
Fax: +44 1684 278611

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