Paul Meehan comments on his blog:
Switch Port Mismatch Recently while rigging up a network config in vSphere, we ran into a strange scenario. It was not a greenfield site from a networking or vSphere perspective and the config was subject to certain constraints which I won’t go into here. We had reason to have the following network configuration, using vSphere standard switches. A Green link indicates and Active adapter for the vmkernel port or virtual machine port group. An Amber link denotes standby. This environment did not have Enterprise Plus, so no dVS.
Read on to see how a little issue with networking can wreck your whole vSphere deployment. Cross training is critical!
Read more at: vSwitch to pSwitch Inconsistency