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Networking problem with shared nothing live migration over SMB 3.0

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Hello!

My basic setup atm consists of 2 Windows Server 2012 R2 nodes, network configuration was basicly done as discribed in this video: http://www.it-cast.de/hyperv/hyper-v-unter-windows-server-2012-r2-preview-teil-4-die-livemigration/

So the 2 nodes have 4 port 1Gbit adapters and i configured ports 1 and 2 to be on different subnets and directly attached between the nodes. Here's the thing now, if i move data (shared folders) between the nodes i get fully pumped up 230MB/sec and both links are used by SMB3.0.

I also get full link usage when i move a VM in status "Shutdown". BUT if i try to move the VM in status "Running" both links get used as well, but this time there is a magic 800mbit (or maybe 1 gigabit, i dont get gigabit speed with a single link either, while live migration) barrier which i cannot overcome. (The 800mbit simply get split up evenly over the number of links)

I searched for nearly 5 days until now and i cant find the error in this setup.

(For the curious, RSS is enabled with 8 queues and as far as SMB 3.0 goes, this setup seems to be well working)

Thanks for your help in advance, i really dont know how to get any further with this problem.

Kind Regards

Rico


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