Hi list!
I'm experimenting with CARP and I'm a bit puzzled by the following
behavior; I have 2 hosts setup in an active/passive way with CARP.
Host A has an advskew of 0 and becomes master, Host B has an
advskew of 100 and becomes backup. Now when host A fails host B becomes
master just like i would expect. However once host A comes backup again
he doesn't become master, he stays backup even though he has a
lower advertise skew.
Peeking with tcpdump tells me host A just goes to backup and doesn't
advertise at all so host B never knows a host with lower advskew
came up.
That's not what I expected. Is that normal? From all the examples I
can find on the net I would expect host A to become master again. For
example a lot of 'ifstated' examples use the advskew to promote or
demote a host as master but since a host with lower advskew doesn't
seem to 'claim' the master position those examples don't work.
The setup is a cleanly installed OpenBSD 6.0 with the only
modifications the configs below. I've tested this in a VM and on
baremetal.
****Host A****
hostname.em1:
----
inet 10.253.255.2 255.255.254.0 NONE
----
hostname.carp1000:
----
carpdev em1 advbase 1 advskew 0 pass foo vhid 20
inet 10.253.255.1 255.255.254.0 NONE
carppeer 10.253.255.3
----
****Host B****
hostname.em1:
----
inet 10.253.255.3 255.255.254.0 NONE
----
hostname.carp1000:
----
carpdev em1 advbase 1 advskew 100 pass foo vhid 20
inet 10.253.255.1 255.255.254.0 NONE
carppeer 10.253.255.2
----
Kind regards,
Jasper
