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Date:      Sat, 23 Sep 2017 09:21:35 +0100
From:      Karl Pielorz <kpielorz_lst@tdx.co.uk>
To:        Steven Hartland <killing@multiplay.co.uk>, freebsd-net@freebsd.org
Subject:   Re: CARP under 10.3 - can't "ifconfig down" one or more VHIDs?
Message-ID:  <3F8D64F72B72084041550C1E@Mac-mini.local>
In-Reply-To: <22f64f3e-5572-4324-5e4c-ab5680e8e612@multiplay.co.uk>
References:  <1183C95F3417890F2D0B1756@[10.12.30.106]> <22f64f3e-5572-4324-5e4c-ab5680e8e612@multiplay.co.uk>

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--On 22 September 2017 at 20:16:25 +0100 Steven Hartland 
<killing@multiplay.co.uk> wrote:

> CARP on 9 and 10 are very different its not a separate interface anymore,
> its a property on the parent interface, so the behavior your described is
> expected.
>
> If you want to disable carp just remove it, if however you want for fail
> to the other virtual host, just bump the advskew or force the state
> change.

Ok, thanks for confirming that - bit of a shame 'ifconfig carpX down' was a 
very quick way of temporarily removing CARP (i.e. so the host didn't 
participate in the pool) for maintenance while leaving the base / parent 
interface available - and then putting it back 'as-was' with messing around 
with the other values.

Do you know if there's any interoperability issues having some 9.x and some 
10.x sharing the same CARP system?


I'll probably replace with a script to store the skews, push them to a very 
high value, mark as 'BACKUP' all the VHID's - and something to undo it all 
again - though actually just removing it might be easier (providing adding 
it doesn't cause a moment of "I'm MASTER, uh, no, I'm BACKUP").

-Karl



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