Guys,
I've discovered a very strange problem.
I have 2 ESXi hosts (both running 4.0) in a DRS/HA cluster and am running vCenter 4.1. The management network has 2 NIC's. We were testing the redundancy on the management network so we plugged out on of the NIC's. The management network stayed up. However when we reconnected the NIC the host went into isolation mode and migrated all the NICs to the remaining host in the cluster.
We had had a second cluster which was connected to a different switch (they were running ESXi 4.1) so we tried to recreate the situation. The same thing happened. We set the management NICs to 1000/Full as well as auto negotiate but the result was the same. I've attached a log file from one of the boxes in case that helps.
I have no idea whats going on any ideas?
change isolation response of HA to leave power on.
if you use nic teaming, check configuration of vswitch :
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Please, don't forget the awarding points for "helpful" and/or "correct" answers.
Mauro Bonder - Moderator
Did have any difference of configuration in vminc4 in your switch core about VLAN ?!
Please, don't forget the awarding points for "helpful" and/or "correct" answers.
Mauro Bonder - Moderator
The configuration of the physical switch ports are identical. Also the problem isnt vNIC 4. As you can see from the tests When I used vNIC's 5 and 6 I was had the same problem with vNIC 5. It seems as if which ever vNIC has the lowest order causes the problem!