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Date:      Tue, 12 Jun 2012 13:48:43 +0100
From:      Pete French <petefrench@ingresso.co.uk>
To:        freebsd-stable@freebsd.org, ml@my.gd
Subject:   Re: IPv6 and CARP crashes boxes
Message-ID:  <E1SeQWZ-0007x5-Uu@dilbert.ingresso.co.uk>
In-Reply-To: <4FC77555.1010202@my.gd>

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Meant to reply to this at the time, but have been away...

> Has anyone else run into problems when using IPv6 + CARP ?

I ran into some - aliases on a CARP integface did not seem
to work proprly - but if you workaround that then it appears
to work fine. We are using it in production with no problems.

> I plan to hold a presentation at work on IP6 and why we should start
> using it, however I cannot promote the use of IP6 without redundancy
> between firewalls like we currently do with CARP + pfsync.

The redundancy with pfsync works properly - an ssh session
is maintained through the firewalls when they failover. I
configure my machines to use a paiur of carp interfaces on each
physical port, so I am not mixing IPv4 and IPv6 on the same
interface. I onyl did that as an experiment when I was trying
to work around the aliases problem, but have kept it for "tidnyess"

Basically our experience of the setup has been very positive - our
main connectivity issues have come from the HE/Cogent peering squabble
rather than any FreeBSD/Carp/PF failing.

cheers,

-pete.



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