Your virtual machines lost network connectivity.
Yeah, Aidan Smash … again.
READ HERE: I’m tired of having to tell people to:
Disable VMQ on 1 GbE NICs … no matter what … yes, that includes you … I don’t care what your excuse is … yes; you.
That’s because VMQ on 1 GbE NICs is:
- On by default despite the requests and advice of Microsoft
- It breaks Hyper-V networking
Here’s what I saw on a brand new dell R730, factory fresh with a NIC firmware/driver update:
Now what do you think is the correct action here? Let me give you the answer:
- Change Virtual Machine Queues to Disabled
- Click OK
- Repeat on each 1 GbE NIC on the host.
Got any objections to that? Go to READ HERE above. Still got questions? Go to READ HERE above. Got some objections? Go to READ HERE above. Want to comment on this post? Go to READ HERE above.
This BS is why I want Microsoft to disable all hardware offloads by default in Windows Server. The OEMs cannot be trusted to deploy reliable drivers/firmware, and neither can many of you be trusted to test/configure the hosts correctly. If the offloads are off by default then you’ve opted to change the default, and it’s up to you to test – all blame goes on your shoulders.
So what modification do you think I’m going to make to these new hosts? See READ HERE above 😀
FYI, basic 1 GbE networking was broken on these hosts when I installed WS2012 R2 with all Windows Updates – the 10 GbE NICs were fine. I had to deploy firmware and driver updates from Dell to get the R730 to reliably talk on the network … before I did what is covered in READ HERE above.