Does restarting the Hyper-V Networking Management Service affect network connectivity to the VM's, Im getting "error enumerating the machine's network switches

ncomper
ncomper used Ask the Experts™
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Hi All
 

I have a 3 node cluster, I noticed i was getting failures when i was trying to migrate / move VM's to or from one of the hosts, upon going into the Virtual network manager i got the error "There was an error enumerating the machine's network switches. Make sure the Hyper-V networking service is installed and working properly"
 

The VM's on this node are funcitioning fine and are pingable from the network, I have read that restarting the service is the first step for troubleshooting this, i wanted to know if this will affect network connectivity to the VM's?
 
Thanks
 

Nick
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Yes, this will stop the connectivity for the VMs on the host

Move your VMs to the other 2 hosts and restart the services then move then around again

Depending on how many VMs you have it might be better to just bite the bullet and restart each host if that's possible

Author

Commented:
Thanks, Unfortunately the reason i am having to do this on Host 3 is because nothing will migrate from host 3 to Hosts 1 or 2, and nothing from Hosts 1 and 2 will migrate to 3, it was all working up until today, the only difference between the 2 hosts that are working and Host 3 is the attached error when i go into the Virtual Network Manager on 3, i think as there in an issue with the networking on host 3 it is causing any migrations to or from this node to fail.

Looks like i will have to bite the bullet and just restart the service and hope it comes back, its typical that this host is running our 2 most critical VM's!

Thanks again

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Author

Commented:
Hi Yes thats correct, In Fail Over Manager we have 3 Cluster Networks

Prod vTeam

ISCSI

HV Live Migration
You can put your VMs into a saved state

It's like hibernation, that way they will restart faster

Author

Commented:
In order to restart that service will i need to restart the Guest VM's to?

Author

Commented:
Hi All

Thanks, i restarted this service last night and there was no interuption to the VM's network connectivity at all

It also solved my issue of getting that error and not being able to live migrate

Author

Commented:
Thanks, just for anyone viewing this in furture, for me  there was no interuption to guest VM's network connectivity when restarting this service, the ping was continuous throughout.

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