Multiple network entries in vCenter Server 5.0.x after migrating virtual machines from a virtual switch to a virtual distributed switch
After migrating virtual machines from a virtual switch to a virtual Distributed Switch (vDS), you see both old and new network entries for the virtual machine in vCenter Server.
In vCenter Server, the virtual machine settings have entries for both the old standard port group and the newer distributed port group.
The virtual machine properties and the .vmx configuration file reference only the vDS configuration.
This issue occurs because the vCenter Server database has an incorrect reference to the old virtual switch network configuration.
If the virtual machine has snapshots associated with the old network, when you reconfigure the virtual machine to use a new network configuration, both old and new networks are associated with the virtual machine.
This issue does not affect functionality and can be safely ignored.
To work around this issue and to remove the reference to the virtual switch network entry, delete the virtual machine snapshots.