The Multi-area SPB redistribution and policies govern the process of importing routes in the Multi-area SPB network across the boundary nodes, that is from the home area to the remote area or vice versa. The traffic flow between the areas within the Multi-area SPB network is the same as the packet flow between the source and destination in a flat SPB network. If more than one boundary node connects to same two areas then the redistribution configuration on the boundary nodes must be consistent, that is the system must permit or deny the same routes to the cross area boundaries.With Multi-area SPB you can configure layer 2 redistribution, layer 3 unicast redistribution, multicast over SPB redistribution, and Distributed Virtual Routing backbone redistribution on the switch.