Hi how are you
With this switches you can communicate the HPE Simplivity traffic nodes, without problem that already has good performance, high speed switching fabric and ability to handle high performance. Respect five or six VLANs you have no restrictions and respect to the connection between both buildings only take care with the distance between boths, because the transceiver that use, the maximum distance is 10Km.
According to what I understand this connection, you will do it in layer 2, so do not need implement protocols like VXLAN for the movement of virtual machines