Hello!
I have a new Windows Server 2019 Hyper-V Failover Cluster where some of the VM's have periodic connectivity loss. I can ping them fine from the Hyper-V host server where they are running, but get intermittent pings from other hosts on the network.
I have a pair of HPE 10/25Gbe 631SFP28 NIC's teamed (Switch Independent) with the Hyper-V Virtual Switch built on that Team. I believe that I have the latest Windows Drivers (Broadcom 10/23/2018 214.0.177.0). I installed the latest HPE firmware for these Adapters.
VMQ is disabled on the Teamed Adapter and two 10/25GB NIC Adapters on both hosts.
The hosts are up-to-date with Windows Updates.
Yet I can get 50% packet loss with a simple ping to these VM's. From some hosts, I can't get any pings to work at all. Yet the correct MAC address shows up in "arp -a".
There is no routing and no VLAN's between the Hyper-V Hosts, VM's, and PC's.
Some VM's appear to have rock solid connectivity, while other (it seems like newly created VM's?) have the connectivity loss. I can live migrate the VM's between hosts and still have ping loss. I admit that the "newly created VM's" idea seems strange, but that's what it seems like. The VM's are using the Hyper-V Synthetic NIC and running patched Windows Server 2019.
Any ideas on what I can try? I would certainly appreciate any help that anyone can offer!
Dave