So this is pretty weird. Brand new pair of Dell R620 servers with Broadcom 57800 10GbE NICs set up in a cluster. All Windows Updates and NIC driver updates installed. If I Live Migrate from Node 1 to Node 2, I see >9.5Gb/s transfer speeds, which means
that the 7 VMs I have running migrate over in about 17 seconds. Not too shabby. If I migrate the VMs back, I only see about 5Gb/s speeds, and it takes about twice as long: 34 seconds. Both servers' Hyper-V Manager are set for up to 8 simultaneous migrations.
I can't find any difference in settings between the two. I'm stumped! Any ideas?
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