Date: Wed, 15 Oct 2014 15:29:48 +0000 From: Matt Churchyard <matt.churchyard@userve.net> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Carp stuck in INIT Message-ID: <102a877d8483473bbd4a5c701c23aaa7@SERVER.ad.usd-group.com>
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Hello, I've just been providing help on the forums to a user trying to get carp to= work with a /30 network, where only 1 address is available. Two FreeBSD routers with one of the addresses in the /30 taken by the upstr= eam ISP. Looking through the carp manpage, which seems to show an example of carp ad= dresses being used as the primary address on an interface (whereas I believ= e it had to be an alias before), I came up with the following example (with= preempt enabled in /etc/sysctl.conf): ifconfig_em0=3D"vhid 10 pass mypass 192.168.0.100/24" defaultrouter=3D"192.168.0.10" However, on boot, I got the following messages, and carp would stick foreve= r in INIT mode. (May not be word for word, written from memory) em0: promiscuous mode enabled carp: demoted by 240 to 240 (interface down) I had to down/up the interface to get it to correctly jump into master or b= ackup mode This seems to have been fixed by changing rc.conf as follows (note the up k= eyword) With this on master and backup, everything seems to work perfectly ifconfig_em0=3D"vhid 10 pass mypass 192.168.0.100/24 up" In comparison to the above messages, which were from the master booting up,= I now see the following: em0: promiscuous mode enabled carp: VHID 10@em0: INIT -> BACKUP carp: VHID 10@em0: BACKUP -> MASTER (preempting a slower master) Is this something that's known to be required, is there a problem, or is it= just because I'm testing with virtualbox? The examples on the carp man page don't use the up keyword. (By the way I realise my tests don't use a /30 network like the one I was o= riginally trying the help with, I was more interested in testing the use of= carp as the only address on a machine. If it works with a single /24 carp = address, I'd expect it to work with a single /30 carp address) Regards, Matt Churchyard
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