Symptoms
Slow performance on new NLB
Diagnoses
I need some help on reviewing the new NLB environment we have setup. The NLB performance to the VIP is slow, but hitting the IP directly is good.
Resolution
In Hyper-V the MAC Address Spoofing needed to be enabled. This because to allow the Unicast traffic to all ports.
link.
https://technet.microsoft.com/en-us/magazine/ff458341.aspx