Virtual Machines vDS Network Interfaces configuration in VMX file is lost upon removing it from inventory

Note: This is no longer an issue in vSphere 5.1.

Today while doing a manual DR failback test at one of the customers sites where they use Virtual Distributed Switches, I have noticed when removing/adding a Virtual Machine to inventory it lose the configuration for its network interface of which port group its connected to and the like. As the customer was running vSphere 4.1u1, I went ahead and tested the same in my lab running vSphere 5.0  which end up  having the exact same behavior. Its important to note that this behavior only affect Virtual Machines that is connected to a Distributed Switch port group, & it does not affect port group configuration for Standard Switches. This behavior although look odd seems to be nothing but as intended by engineering as it makes the assumption that you are restoring the VM to a different Infrastructure where these Distributed Switches might not exist.

Agree or not agree is not the purpose of this post, but to confirm this behavior as well to be in front warning that you should keep that configuration handy before hand in case you need for any reason to remove your VMs from inventory. In my case was carrying out a manual disaster recovery fallback without involving vCenter Site Recovery Manager.… Read More

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