Let's say I want traffic from VM1 to VM2 should go through VM3, Which means I am going to consider VM3 as Network Virtual Appliance (NVA) and configure routing accordingly.
My question is if my NVA, which is a Azure VM in my case, has more than one NIC cards - Do I need to enable IP forwarding on all the NICs ? Will routing work if IP forwarding is enabled on just one NIC, leaving one or more NIC on my NPA without IP forwarding enabled on them. Sorry, I can't set up the ENV and test it myself.
Appreciate your insightful response, thank you !!