Hyper-V vms randoming loosing connection

In a few deployments I have seen that there has been a terrible performance and also loose of network connection between server and workstation. F:ex saving a 100Kb excel file could take 15 seconds…By pinging the server I have found out that it seemed to drop every second package.

The solution for me has to disable the tcp offload for both ipv4 and ipb6 on all the servers, including the management hyper-v parent partition and the affected virtual machines.. You can find the settings under device manager and network card (properties) on the parent partition and inside the vms itself..

 

Skjermbilde 2014-03-23 kl. 22.13.24

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