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Date: Tue, 31 Oct 2006 13:36:39 -0800 (PST) From: David Miller <davem@...emloft.net> To: shemminger@...l.org Cc: peter.hicks@...gs.co.uk, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: Thousands of interfaces From: Stephen Hemminger <shemminger@...l.org> Date: Tue, 31 Oct 2006 10:22:22 -0800 > On Tue, 31 Oct 2006 01:31:54 -0800 (PST) > David Miller <davem@...emloft.net> wrote: > > > From: Peter Hicks <peter.hicks@...gs.co.uk> > > Date: Tue, 31 Oct 2006 09:25:50 +0000 > > > > [ Discussion belongs on netdev@...r.kernel.org, added to CC: ] > > > > > I have a dual 3GHz Xeon machine with a 2.4.21 kernel and thousands (15k+) of > > > ipip tunnel interfaces. These are being used to tunnel traffic from remote > > > routers, over a private network, and handed off to a third party. > > ... > > > Is it possible to speed up creation of the interfaces? Currently it takes > > > around 24 hours. Is there are more efficient way to handle a very large > > > number of IP-IP tunnels? Would upgrading to a 2.6 kernel be of use? > > > > > 2.4 has a several N^2 searches for interfaces (and is in deep freeze by now). > 2.6 had several changes to handle 1000's of interfaces. Oops I didn't notice this was with 2.4.x. Indeed, 2.4.x definitely cannot handle large numbers of networking interfaces at all without major surgery. 2.6.x should handle this significantly better. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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