You are correct, if I have the vm connected to a port group with no resource group associated to it and continously ping the gateway it works fine. The minute I apply the resource group setting the pings just stop mid way. If I cancel out of the ping and attempt to restart the ping to the gateway it says destination host unreachable almost as if suddenly the vSwitch's arp table doesnt understand were to go to get to the gateway (only a guess at this point).
If I am pinging something like a machine (regardless of another VM or physical box) pings dont stop and communication works fine.
And yes I only have a single nic connected to the vswitch from each host.
I wasnt aware that there should be any modifications to the packets when resource group allocation is set is there?
I would hope not. QoS yes, but for the host to simply start to prioritize packets flowing in / out the vswitch based on port i woudlnt think it would need to modify the data going through it outbound, or does it?