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The graphic shows 2 OVS/dom0 blocks. Each block contains 2 domU's blocks. Each domU block contains ib0 and ib1. Both ib0 and ib1 connect to the InfiniBand switches using pkey 0xffff. The dom0 block also contains IB0 and IB1. ib0 in the domU's connect to IB0 using SRIOV. ib1 in the domU's connect to IB1 using SRIOV.
RAC Cluster 1 connects to the first domU's in the dom0 blocks, and RAC Cluster 2 connects to the second domU's in the dom0 blocks. The RAC Clusters using pkey 0xffff.
The graphic also shows 3 storage cells. Each storage cell contains IB0 and IB1. IB0 and IB1 connect to the InfiniBand switches using pkey 0xffff.