Hyper-V Network Connectivity Issues with Emulex Adapters

I retweeted this late last week, but wanted to mention it here on my blog.  Emulex has just published a blog post talking about a known issue that is causing network connectivity problems for Hyper-V VMs when using Emulex network adapters.  They have also explained how to work around this until they have a final fix ready.  You can read about it here:

https://blogs.emulex.com/implementers/2014/06/19/microsoft-windows-20122012-r2-hyper-vms-losing-network-connectivity-workaround/

I am blogging about this for two reasons:

1. I have been contacted by a number of customers who have hit this, and want people to know about what to do.
2. It is really good to see a hardware vendor documenting status and workarounds for known issues, and I am glad to see this post going up.

Cheers,
Ben

Comments

• Anonymous
  June 24, 2014
  It isn't just Emulex adapters.  Broadcom adapters also.  We experienced the same connectivity drops with VMQ enabled on Broadcom cards.  Once we switched over to Intel cards, problem was resolved.

• Anonymous
  June 25, 2014
  Now if only HP/Broadcom would own up in a similar fashion.......

• Anonymous
  September 07, 2014
  Broadcom already fixed this in their later firmware/drivers. I updated them for two Dell servers and now they're working perfectly with VMQ enabled VMs. Cheers.

• Anonymous
  January 23, 2015
  Still waiting for Microsoft/HP/Emulex to stop pointed fingers or claiming the issue is fixed. It has been a year now. www.hyper-v.nu/.../another-update-on-the-vmq-issue-with-emulex-and-hp

• Anonymous
  May 25, 2015
  The comment has been removed

• Anonymous
  November 21, 2015
  enable vmq on all nic's and that's your solution, try it

• Anonymous
  November 21, 2015
  only on the new hw