VM displays to two port groups after migrating to a distributed vSwitch

The Virtual Unknown

Do you ever encounter the same issue over and over again and forget how you solved it the first time, or what caused it to happen in the first place?!?

It happened to me today on a customer site….. we were migrating a couple hundred VMs off a standard vSwitch onto a newly created Cisco Nexus 1000v switch and several VMs were showing to be connected to the old port group on the standard vSwitch as well as the new port group on the distributed vSwitch.
The VM Summary showed connections to 2 port groups even though there was only 1 vNIC and what made it more confusing was if you went and edited the VM hardware settings the vNIC was configured with the correct port group….. hmmm…..

It was a case of Déjà vu…. I sat there thinking « Damn, I’ve seen this before… but for the life of me I can’t…

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