Hi,
This is frequent in my virtual environment, VMs loose network after vmotion.and Once I disconnect and reconnect the vNIC, it fixes the issue.Details below : -
VM H\W version = 7
Host = ESXi 4.1
VMtool = Updated
I have VDS and standard switches both in question . Checked some basic settings such as "Notify switch" is set to YES on Standard switches.
Any other suggestions ?
Thanks in advance !
If you have been paying attention to the ESXi host to which the VM's are migrated during your vMotion, do the problems generally occur with the same ESXi host? That could narrow things down.
I have seen this happen in the past with a 4.x cluster... the host does not necessarily detect a problem with the uplink on a particular host, though there is in fact an issue. The VM is moved to that host, and the problem vmnic is selected to be used by the vm's vswitch port. My workaround was the same - disconnect nic, then reconnect. But upon further inspection, I found there was evidence of an issue. On one of the uplinks, the CDP information was not showing, while it was showing for all the other uplinks on the same host, and for all the uplinks on other hosts connected to the same physical switch. Ended up replacing the nic, I think.
Often this issue occurs due to a configuration issue in the physical switch ports. Can you confirm you have spanning-tree portfast [trunk] (this may differ, depending on the switch vendor) configured on all uplink ports?
André
Hi,
Check this KB which talks about this issue http://kb.vmware.com/kb/1003969
Regards
Mohammed Emaad
what is the binding set .. is it static,, dynamic or ephemeral
It is set to Static, I know that could be a showstopper. but need to ensure that it is before we make change .
Yep try changing the binding and check if we are able to repro