Hi all,
Whenever I vMotion a VM between hosts I get something along the lines of the following logged:
ESXi has detected 24ms round-trip vMotion network latency between host source_host_ip and destination_host_ip . High latency vMotion networks are supported only if both ESXi hosts have been configured for vMotion latency tolerance.
warning
13/09/2012 12:46:23
hostname
Doing a vmkping on the hosts does indeed show that latencies (which typically are sub 1ms) do indeed go up and up during the vMotion and then immediately drop off once it's done (vMotions are still completing fine).
I have tested removing the switch from the configuration and putting a network cable between the two hosts but the problem remained.
Both hosts have two dedicated vMotion NIC ports, and vMotion is split off into it's own vSwitch. The NICs are auto-negotiate and are running at 1000 full.
Anyone got any ideas why I'm seeing this warning logged?
Cheers,
Luke