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Date: Thu, 11 Sep 2014 11:04:45 -0700
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Subject: Re: Using CARP with multiple IP aliases (FBSD 10.0)
From: Freddie Cash <fjwcash@gmail.com>
To: Peter Wemm <peter@wemm.org>
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Cc: Steven Hartland <killing@multiplay.co.uk>,
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On Thu, Sep 11, 2014 at 10:39 AM, Peter Wemm <peter@wemm.org> wrote:

> This is the method we use extensively in the freebsd.org cluster.  eg: th=
e
> routers have public IP addresses, private RFC1918, IPv6 etc addresses, al=
l
> on
> the same vhid for each interface.
>
> * One vhid presence, with multiple aliases on the same vhid.
> * Configure vhid params once, aliases attached without params.
>
> carp state checking uses link local addresses to communicate.
>
> Having multiple IP's per vhid means they change master->backup state as a
> group, not individually and that's what we wanted for things like router
> default gateways.
>

=E2=80=8BExcellent.  Thanks for the confirmation.

=E2=80=8BI'll be testing the updated configuration tomorrow morning (set al=
l vhid
params in rc.conf.local, and only set vhid number in firewall scripts when
adding IPs).


--=20
Freddie Cash
fjwcash@gmail.com