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All VMs crash when we loose Layer 3 connectivity

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Greetings, any chance that you could clear up a SCVMM debate that we have been having for some time.  We have a Windows 2012 R2 8 node cluster using SAN storage (System x3850 X5 & Emulex 42D0494, PCI Slot 1, Storport Miniport Driver). + 8 NICs for the VMs spread over 4 switches in a stack.  We recently did a reboot of the Juniper stack and all of the VMs in Hyper-V crashed, but the VMWare VMs were all OK.  We have been told that because Microsoft uses the LAN to communicate to the LUNs rather than the HBA like VMWare,  all of the VMs would crash and this is normal.  This is because VMWare own the patents to LUN state communication, so Microsoft has to use the LAN.  

Hope this makes sense.  I am not talking about the VMQ problem that lots of other people are getting, by the way.
So not this
http://alexappleton.net/post/77116755157/hyper-v-virtual-machines-losing-network

Kind regards, Tony

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