Date: Tue, 06 Oct 2009 18:14:58 +0500 From: rihad <rihad@mail.ru> To: Eugene Grosbein <eugen@kuzbass.ru> Cc: freebsd-net@freebsd.org, Luigi Rizzo <rizzo@iet.unipi.it>, Julian Elischer <julian@elischer.org> Subject: Re: dummynet dropping too many packets Message-ID: <4ACB42D2.2070909@mail.ru> In-Reply-To: <20091006100726.GA26426@svzserv.kemerovo.su> References: <4AC9CFF7.3090208@mail.ru> <20091005110726.GA62598@onelab2.iet.unipi.it> <4AC9D87E.7000005@mail.ru> <20091005120418.GA63131@onelab2.iet.unipi.it> <4AC9E29B.6080908@mail.ru> <20091005123230.GA64167@onelab2.iet.unipi.it> <4AC9EFDF.4080302@mail.ru> <4ACA2CC6.70201@elischer.org> <4ACAFF2A.1000206@mail.ru> <4ACB0C22.4000008@mail.ru> <20091006100726.GA26426@svzserv.kemerovo.su>
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Eugene Grosbein wrote: > On Tue, Oct 06, 2009 at 02:21:38PM +0500, rihad wrote: > >> Is there some limit on the number of IP addresses in an ipfw table? > > No, generally handles much more. Please show your ipfw rule(s) > containing 'tablearg'. > 01031 x x allow ip from any to any 01040 x x skipto 1100 ip from table(127) to any out recv bce0 xmit bce1 01060 x x pipe tablearg ip from any to table(0) out recv bce0 xmit bce1 01070 x x allow ip from any to table(0) out recv bce0 xmit bce1 01100 x x pipe tablearg ip from any to table(2) out 65535 x x allow ip from any to any table(127) contains country-wide ISPs' netblocks (under 100 entries). table(0) and table(2) contain same user IP addresses, but different pipe IDs - normally around 3-4k entries each. Now please pay special attention to rule 1031. I've added it to bypass dummynet and stop packets from being dropped for now. Normally the rule isn't there. As I found out today after rebooting, drops only start occurring when the number of entries in table(0) exceeds 2000 or so (please see my previous email). Maybe it's a coincidence - I don't know. Global traffic load doesn't matter - it was approximately the same before and after the drops (around 450 mbit/s).
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