Date: Tue, 10 Jul 2001 12:01:30 +0300 From: Ruslan Ermilov <ru@FreeBSD.ORG> To: Richard Smith <rdls@satamatics.com> Cc: net@FreeBSD.ORG Subject: Re: sysctls keepidle and keepintvl Message-ID: <20010710120130.A5467@sunbay.com> In-Reply-To: <20010709230512.A918@gaia.home.rdls.net>; from rdls@satamatics.com on Mon, Jul 09, 2001 at 11:05:13PM %2B0100 References: <20010709230512.A918@gaia.home.rdls.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Jul 09, 2001 at 11:05:13PM +0100, Richard Smith wrote: > 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, > Only TCP sockets marked with SO_KEEPALIVE setsockopt(2) will be kept alive. Alternatively, you can enable this option on all sockets implicitly by net.inet.tcp.always_keepalive=1. (Or by setting tcp_keepalive rc.conf(5) variable to "YES"). Cheers, -- Ruslan Ermilov Oracle Developer/DBA, ru@sunbay.com Sunbay Software AG, ru@FreeBSD.org FreeBSD committer, +380.652.512.251 Simferopol, Ukraine http://www.FreeBSD.org The Power To Serve http://www.oracle.com Enabling The Information Age To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20010710120130.A5467>