Date: Fri, 03 Aug 2001 00:09:26 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Andre Oppermann <oppermann@telehouse.ch> Cc: freebsd-hackers@FreeBSD.ORG, freebsd-net@FreeBSD.ORG Subject: Re: 303,000 routes in kernel Message-ID: <93100.996790166@critter> In-Reply-To: Your message of "Fri, 03 Aug 2001 00:03:43 %2B0200." <3B69CE3F.1BCCB280@telehouse.ch>
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In message <3B69CE3F.1BCCB280@telehouse.ch>, Andre Oppermann writes: >The problem I've got now is that for every packet I get the kernel is >making one host entry in the routing table. Because of the many UDP >DNS requests from all over the world I've got 303'000 (yes, three- >hundredthreethousand) entries in the kernel routing table which have >not expired yet. So I'm getting error messages like this now: Hmm, I wasn't aware that we cloned routes for UDP packets, are you sure that is what is causing the routes to exists ? (Just to mention the obvious: it's not CodeRed probes ?) You can tweak the route behaviour with some sysctls: Notably: net.inet.ip.rtexpire: 473 net.inet.ip.rtminexpire: 10 net.inet.ip.rtmaxcache: 128 There's probably also a detailed explanation what they do somewhere... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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