Date: Thu, 1 Dec 2016 15:10:16 -0500 From: Robert Blayzor <rblayzor.bulk@inoc.net> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: CARP master election changed in 11.0 ? Message-ID: <B7463704-11F2-4CD8-B66D-C99A7A482D1A@inoc.net>
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Did something change between 10.x and 11.0 with carp MASTER election and =
advskew?=20
I have several 10.3 servers where the master is elected based on the =
member with the LOWEST advskew.
=46rom a pair of 10.3 servers:
vlan: 100 parent interface: lagg0
carp: MASTER vhid 10 advbase 1 advskew 100
vlan: 100 parent interface: lagg0
carp: BACKUP vhid 10 advbase 1 advskew 110
Deploying a new pair of 11.0-RELEASE servers, I see the opposite; seems =
like the member with the HIGHEST advskew wins now:
carp: BACKUP vhid 20 advbase 1 advskew 0
groups: lagg
carp: MASTER vhid 20 advbase 1 advskew 100
groups: lagg
Preemption doesn=E2=80=99t seem to matter, even with preemption enabled. =
(which it is).
=46rom OpenBSD, man reads:
advskew
This optional parameter specifies how much to skew the advbase when =
sending CARP advertisements. By manipulating advskew, the master CARP =
host can be chosen. The higher the number, the less preferred the host =
will be when choosing a master. The default is 0. Acceptable values are =
from 0 to 254.
And this seems true in 10.3 but reversed in 11.0 ?
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