Network Drops for 30 seconds During Hyper-V Live Migration

I have 3 physical Hyper-V hosts setup with clustered storage. I disabled VMQ because I was getting errors when trying to do live migrations. I have also ran the network portion of the cluster validation tests without errors. What happens is basically when I do a live migration from any host to any other host I lose network connectivity to any VM running on those hosts. During this time I have a SQL application that is running and locks up and freezes all the users. Many will have to use task manager to kill the application to get back in or even reboot their machines to free it up.

I have been doing a ton of reading on network settings and configurations and have made no progress. Any help to point me in a direction to get this solved will be appreciated. I need to be able to do Live Migrations on my cluster storage.

Thanks for any help.

  • Edited by BrianEhMVP Monday, May 18, 2015 3:51 PM clarity
  • Moved by BrianEhMVP Monday, May 18, 2015 3:51 PM
May 18th, 2015 2:25pm

I enabled only the LM network for Live Migrations and verified the IP setup. I tried another migration and it crashed the SQL box again. Also when the migration completed it said: "There currently are no network adapters with network optimization available on host"
  • Edited by JaxIsland Thursday, May 21, 2015 1:38 PM
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May 21st, 2015 12:53pm

I downloaded and ran all those updates in the link and they all reported back they were not applicable. I assume its because they already have the updates from Windows Update.

  • Edited by JaxIsland Tuesday, May 26, 2015 4:46 PM
May 26th, 2015 4:13pm

Is there a next step that I should take?


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June 2nd, 2015 10:25am

Have tried configuring QoS on the SQL network to ensure it is not starved for bandwidth?
June 2nd, 2015 3:32pm

Limit the Live migrations say just two VM's at the time. Setting must be done on all the nodes.

Patching the Nic cards with the latest drivers.  Sending Live migration thru dedicated NIC and not using the Management Lan nic.

when you do a LM what is the thru put off your nic's ?

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June 3rd, 2015 3:36am

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