I have an ESXi host (5.5 U2) that is running 10 VMs. The host is lightly loaded, averaging 10%CPU usage at most points throughout the day.
One and only one VM is experiencing packet loss up to 20% when it is pinged. The OS for this VM is the IBM 4690 POS which is supported in VMware.
I have tried all the different adapters for this VM (Flexible, E1000, etc ...) with no effect. VMware tools is not installed.
I also used ESXTOP and there is no TX or RX packet loss on the vSwitch.
Here's the kicker - I always experience packet loss when pinging this VM from my laptop, even when plugged into the same switch as the ESXi host (VM is one hop away). However, if I ping this VM from one of the other VMs running on the same host, I receive no packet loss.
Does anyone have any ideas why there is packet loss when going through the pNIC and not when going straight VM to VM?
More importantly, does anyone have any ideas on how to get rid of the packet loss?
Thanks in advance for your assistance!