VMware Vmotion 5.1 fails at 51% , Between two identical new vmware servers

We've solved this problem last week. sorry for my late response.

We've been trying to setup our Storage and vmotion network as following doc:

http://blogs.vmware.com/vsphere/2011/08/vsphere-50-storage-features-part-12-iscsi-multipathing-enhancements.html

We have created 2 vmkernel each using one of both physical interface who were added to the vswitch. To work as an active active interface setup, to be able to perform iscsi multipathing.

Eventually we removed the 2nd vmkernel added both physical interfaces to the one remaining vmkernel and let nic teaming do al the active active multipathing.

It solved our problem immediately.

Cheers.