Date: Wed, 29 Feb 2012 21:01:45 -0500 From: Steve Wills <swills@FreeBSD.org> To: "K. Macy" <kmacy@FreeBSD.org> Cc: stable@FreeBSD.org, Doug Barton <dougb@FreeBSD.org>, current@FreeBSD.org, =?UTF-8?B?eiBXxIVzaWtvd3NraQ==?= <lukasz@wasikowski.net>, Arnaud Lacombe <lacombar@gmail.com>, Alexander Leidinger <Alexander@leidinger.net>, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Subject: Re: flowtable usable or not Message-ID: <4F4ED889.2070608@FreeBSD.org> In-Reply-To: <CAHM0Q_O%2BCt6yhRL=B9oxgkL8EgLxZdo7-KFO2C8HqiN1=Kx_bw@mail.gmail.com> References: <20120221143537.Horde.deyFDZjmRSRPQ52pxBIpnLA@webmail.leidinger.net> <BA7FFA2D-DEE6-4FB7-AE26-0BC79CBFD8C0@lists.zabbadoz.net> <4F4BA707.5070608@wasikowski.net> <4F4C3FE7.3040802@FreeBSD.org> <CACqU3MWx3pMMDncvOita-OAgfe=NPKtwKE2WeB_mdcYwozY81Q@mail.gmail.com> <4F4D51CB.2010508@FreeBSD.org> <4F4D5E5D.9040302@FreeBSD.org> <4F4DD288.5060106@FreeBSD.org> <CAHM0Q_O%2BCt6yhRL=B9oxgkL8EgLxZdo7-KFO2C8HqiN1=Kx_bw@mail.gmail.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 02/29/12 13:17, K. Macy wrote: > . >> >> I tried it, on both FreeBSD routers, web systems, and database >> servers; all on 8.2+. It still causes massive instability. >> Disabling the sysctl, and/or removing it from the kernel solved >> the problems. > > Routing I can believe, but I'm wondering how close attention you > paid to the workload. There are CDN networks with high uptimes and > shipping firewall products that use flowtable, so your mention of > web systems forces makes me ask for specifics. > The failure I experienced was with web servers running 8.0 behind a F5 load balancer in an HA setup. Whenever the failover happened, the web servers would continue sending to the wrong MAC address, despite the arp table updating. Disabling flowtable via the sysctl solved the problem. Maybe Doug's failure was similar, maybe not, but I thought I'd throw my $0.02 in. Steve -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iQEcBAEBAgAGBQJPTtiJAAoJEPXPYrMgexuhp8EIAKGGtZzcxgQ4zVO5SKy1jAOH DXLRLYfdm8NJB9hYEvtUa9/nltAE35zQMp7FU4AlZ2L2ol/J7W9aODiN0gw9AFEr dxBYyQliDKvVwLgah9a5PaXNM3kpx9ZvZGM3lBQGQbZaEV+ERwjBXkfIqjEB4Ei5 bBd7841jQm22s1xJOuJTdMGrpnY1DMUPdPCFOAtyQmTAhWpoELgtQBvP9kGYNKv2 3NAPnjFuooe9fdze9VSO8TWFJSb82DVbRsz6JiR0998oHXPApCh4I5y1rNcg2qA/ 1x2EdFlivXpgjC4nKUgFjhohmdGv20FrLfex4eOq6dSMF0Baje86PJcc8EZ1DK0= =NUft -----END PGP SIGNATURE-----
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