Hyper-V 2012 R2 & NLB (Network Load Balancing) with Unicast on VMs RRS feed

  • Question

  • Hi,

    We set up a 2012 R2 Hyper-V Cluster. On this Cluster we would like to run 2 VM's which are using NLB (Network load Balancing) in Unicast mode.

    We have created a External Virtual Switch wich is connected trough a 3x10GB LACP Team to a Cisco Nexux Switch.

    We have tried to set the NLB up in the way we did with 2008 R2 but we were not be able to get this working. Is there any Change in 2012 R2 we did not think about?

    Each time we form the Cluster one Node becomes unavailable.


    Wednesday, November 20, 2013 8:51 PM

All replies

  • Check the virtual network adapter properties - you must enable MAC address spoofing.  We had the same issues.

    Note that this will absolutely pollute your host machine's system log with tons of spam and make it pretty much worthless.  I'm trying to find a way around this as we speak, actually.

    Monday, December 9, 2013 7:44 PM
  • In the Cluster Hyper 2012 R2 the option of Mac address spoofing is not available in the Network Adapter. You just simply configure de NBL on both virtual machines. Have you tested with Multicast Mode?

    VGomez Ch.

    Tuesday, April 8, 2014 8:43 PM
  • Any updates on this as I am hitting the same issue?
    Tuesday, May 27, 2014 5:33 PM