Date: Mon, 4 Apr 2011 12:22:49 +0200 From: Frederique Rijsdijk <frederique@isafeelin.org> To: "K. Macy" <kmacy@freebsd.org> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: Network stack unstable after arp flapping Message-ID: <20110404102249.GB3421@deta.isafeelin.org> In-Reply-To: <BANLkTi=dvHagdukgUgp2SbcB37vRXvFbTA@mail.gmail.com> References: <20110401141655.GA5350@deta.isafeelin.org> <4D95E62A.5000109@comcast.net> <4D987B1B.4000608@isafeelin.org> <BANLkTin0RsisoLp-x9WinjvJuf3pmSz13w@mail.gmail.com> <20110404095333.GA3421@deta.isafeelin.org> <BANLkTi=dvHagdukgUgp2SbcB37vRXvFbTA@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi Kip, Thanks. Any idea btw why this would also effect hosts that run 6.x and 7.x RELEASE versions? These do not have the flowtable sysctl. -- Frederique On Mon, Apr 04, 2011 at 12:09:05PM +0200, K. Macy wrote: > Correct. Set it to zero and the flowtable will be bypassed. > > flowtable.c: > static uint32_t > ipv6_flow_lookup_hash_internal( > struct sockaddr_in6 *ssin6, struct sockaddr_in6 *dsin6, > uint32_t *key, uint16_t flags) > { > uint16_t sport, dport; > uint8_t proto; > int offset = 0; > > if ((V_flowtable_enable == 0) || (V_flowtable_ready == 0)) > return (0); > > > Ciao > > On Mon, Apr 4, 2011 at 11:53 AM, Frederique Rijsdijk > <frederique@isafeelin.org> wrote: > > Kip, > > > > Which sysctl are we talking about exactly? Just to be sure.. > > > > net.inet.flowtable.enable ? > > > > > > -- Frederique > > > > > > > > On Sun, Apr 03, 2011 at 08:11:33PM +0200, K. Macy wrote: > >> I don't think it was properly tested when it was enabled for IPv6. > >> Given that I have been absentee it really should not be in the default > >> kernel or at least the sysctl should be off. Sorry for the > >> inconvenience. Additionally, you don't need to rebuild you can just > >> disable the sysctl. > >> > >> > >> -Kip > >> On Sunday, April 3, 2011, Frederique Rijsdijk <frederique@isafeelin.org> wrote: > >> > Steve, > >> > > >> > On 01-04-11 16:50, Steve Polyack wrote: > >> >> On 04/01/11 10:16, Frederique Rijsdijk wrote: > >> > [ .. ] > >> >>> Mar 31 18:36:12 srv01 kernel: arp: x.x.x.1 moved from > >> >>> 00:00:0c:9f:f0:3d to 00:00:0c:07:ac:3d on bge0 > >> > [ .. ] > >> >>> The result of that, is that loads of FreeBSD machines (6.x, 7.x and > >> >>> 8.x) developed serious network issues, mainly being no or slow traffic > >> > [ .. ] > >> >>> Any ideas anyone? > >> >> We experienced a similar issue here, but IIRC only on our 8.x systems > >> >> (we don't have any 7.x). Disabling flowtable cleared everything up > >> >> immediately. You can try that and see if it helps. > >> > > >> > AFAIK this feature was introduced in 8.x? Btw you are here referring to > >> > UDP, we had issues with TCP. It could still be related, perhaps I'll get > >> > around emulating the situation and see if I can reproduce it. > >> > > >> > > >> > -- Frederique > >> > > >> > > >> > _______________________________________________ > >> > freebsd-net@freebsd.org mailing list > >> > http://lists.freebsd.org/mailman/listinfo/freebsd-net > >> > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > >> > > >> _______________________________________________ > >> freebsd-net@freebsd.org mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-net > >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > > _______________________________________________ > > freebsd-net@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-net > > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20110404102249.GB3421>