Is it possible to trigger an alert for a network port and/or port channel that goes down? I am using the vRealize True Visibility suite.
Without any add-on packs you can do this already out of the box.
There are alerts for Physical Network down for the Host
The Host has lost connectivity to Physical network
The Host has lost redundant uplinks to the network
And if you download my Inventory dashboard you can see there are metrics for Port Groups down that you can use. (See screenshot below)