What is the recommended option in a very simplistic FabricPath domain/network using a couple of Nexus 7K's as the spine connected via a vpc+ link with a combination of Nexus 6K/5K leaf switches, each switch pairs with their own vpc+ link between them with regard to setting the vlan root priority using either of the following:
1/ spanning-tree vlan x-y priority 4096
2/ spanning-tree pseudo-information
vlan x-y root priority 4096