VMs lose of network when performing Storage vMotion

[KatlegoTec]

Hi All

I am new to VMware and have fundamental skill level. I needed to find out an issue I am running into, when it comes to vMotion.

Firstly we installed the new hosts, and run into network connectivity issue on all vms after they were migrated to new hosts, to solve this issue we had to disable the network card and then re-enabling it again and solved the challenge, thought it was a one time incident and that maybe since we were just migrating VMs a compute level, I didn't think much of it. But now we added new SAN and performed storage vMotion the same challenge came up. Could you please clarify for me what could be causing this? From what it seems, if we start a migration, whether it is on compute only, or storage only, we drop network on the VM’s.

Thank you in advance.

[mbufkin]

Did you dedicate a seperate Network Adapter for vMotion? vMotion traffic should be on it's own network and adapter.

Here is a link to the Networking Best Practices for vSphere vMotion:

https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vcenterhost.doc/GUID-7DAD15D4-7F41-...

[KatlegoTec]

Hi @mbufkin

Thank you let me try out best practices and will revert back to you.

[mbufkin]

Thanks and good luck. 

[scott28tt]

No need to create a second thread for the same issue, your duplicate has been reported to moderators.

[depping]

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@scott28tt wrote:

No need to create a second thread for the same issue, your duplicate has been reported to moderators.

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deleted the duplicate.

[depping]

It would be good to better explain what is happening, as I am not sure I understand.

1) Are you losing connectivity on a VM when the VM is migrated from one host to another?

--> typically caused by misconfigured STP: https://kb.vmware.com/s/article/1003804

2) Are other VMs losing connectivity when a VM is migrated?

--> could be caused by the fact that ALL traffic is going across the same network

So we would need to have some more details to understand your issue.

[KatlegoTec]

Thanks for the advice again. There wasn't a dedicated vMotion adapter configured before. Now VMs migrated smoothly.