Date: Mon, 23 Oct 2006 16:21:35 -0400 From: Vivek Khera <vivek@khera.org> To: Max Laier <max@love2party.net> Cc: freebsd-stable@freebsd.org Subject: Re: CARP not balancing automatically Message-ID: <05BE5E0E-0A4A-4946-8650-3608EBAF540E@khera.org> In-Reply-To: <200610231950.39584.max@love2party.net> References: <8F9483A9-D387-443E-A325-356958211153@khera.org> <200610231950.39584.max@love2party.net>
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On Oct 23, 2006, at 1:50 PM, Max Laier wrote:
>> Until I perform this manual step, all traffic goes to the single box.
>> After I perform this step, the traffic is balanced nicely as expected
>> amongst the local network hosts. Each box then has one MASTER and
>> one BACKUP carp interface for this IP.
>
> Sounds like you forgot the net.inet.carp.preempt sysctl. See the
> begining
> of the EXAMPLES section of carp(4).
But I don't have multiple interfaces that all need to go up/down
together. I need one carp interface to be master and one backup on
box A, and the opposite master/backup on box B. Or am I totally
misunderstanding with the preemtp sysctl is for?
The second example in the EXAMPLES section is what I followed. It
makes no mention of needing preempt, but does say I need arpbalance.
Is the documentation incomplete in the second example, then?
What I want to end up with (and what I get after my manual
manipulation) is this:
one host:
carp0: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
inet 192.168.100.100 netmask 0xffffff00
carp: BACKUP vhid 5 advbase 1 advskew 100
carp1: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
inet 192.168.100.100 netmask 0xffffff00
carp: MASTER vhid 6 advbase 1 advskew 0
other host:
carp0: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
inet 192.168.100.100 netmask 0xffffff00
carp: MASTER vhid 5 advbase 1 advskew 0
carp1: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
inet 192.168.100.100 netmask 0xffffff00
carp: BACKUP vhid 6 advbase 1 advskew 100
what happens on boot is one box has both MASTER and the other has
both BACKUP resulting in zero load balance.
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