Date: Wed, 09 Dec 2009 15:36:15 +0000 From: Tom Judge <tom@tomjudge.com> To: Claudio Jeker <cjeker@diehard.n-r-g.com>, freebsd-net@freebsd.org Subject: Re: carp(4) and VRRP on the same segment Message-ID: <4B1FC3EF.8060708@tomjudge.com> In-Reply-To: <20091209152356.GA31932@diehard.n-r-g.com> References: <4B1FB7A2.2020801@tomjudge.com> <20091209152356.GA31932@diehard.n-r-g.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Claudio Jeker wrote: > On Wed, Dec 09, 2009 at 02:43:46PM +0000, Tom Judge wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> Hi, >> >> We have had some issues with running both carp and VRRP in the same >> physical segment. It has mostly caused issues with the embedded devices >> running VRRP. One other side affect is the hugely verbose output on the >> FreeBSD side where carp is complaining about corrupt PDU's. >> >> To work around this I changed the carp protocol number from the VRRP >> allocated number to an unassigned number (241). Simple patches can be >> found here: >> http://svn.tomjudge.com/freebsd/patches/carp-vrrp-interop/ >> >> >> Maybe this can be made into a sysctl for carp, so that the administrator >> can select a different protocol number at boot/runtime if desired. >> > > I think you will hit the other issues with this. > Normaly it is sufficent to ensure that the carp vhid and the VRRP vrid are > not equal. > This works for the most part but I have seen one device in particular barf when it receives a carp frame. This change also significantly reduces the logging output from the VRRP and CARP devices. I understand that there are issues with migration, and interop out there but this is a useful change to reduce junk log messages and random crashes of embedded vrrp devices. Tom - -- TJU13-ARIN -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJLH8PuAAoJEMSwVS7lr0OdZp0H/3cqKL/5qCPXew6rGCMDbdtC KHuGnAPuPyp3pY3c3jBrMEWNLR/IsymQjAhm/61mGLHERK0gKixNkgespO0Zr/gz fTstlSc/LUC1FfpVVzSDkASsrE7fU+pZu3g9RGjsKLyT/YwMx2GsA4NjONMLDRe3 iTIElTUEwKxr2h1T8eDiQLN//bOxkZm+BXHKOUnJmLw1NEyZXVHhh0ixnhAYFHpf 0378mxE0sPPBiTzBD1ClwmHPV6pzb/mSjzg7zZrmxjVqybO4Adi/KkLBiwyci36X 89wGmaOzuu23LDhZHgRwuFm/Rd1rIrPwOZEZj68R4nh8EJ7GylF6doBUFUz8X/o= =S+YK -----END PGP SIGNATURE-----
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