The Distributed Virtual Routing (DvR) functionality within the Multi-area SPB network is same as the DvR functionality in the flat SPB network. For more information, see Distributed Virtual Routing Fundamentals. To configure Multi-area SPB DvR backbone redistribution, the boundary node must be a functional DvR controller in a domain in the home area or a non-DvR Backbone Edge Bridge.
Note
DvR domains can only be a part of one area, you must not configure the same DvR domain in multiple areas.
When you enable the Multi-area SPB DvR backbone redistribution the system extends the DvR backbone across the area boundaries. The boundary node in the Multi-area SPB network performs the DvR controller functions to receive and propagate the hosts in the DvR domain. Since the interior nodes in one area of the Multi-area SPB network are not visible to the interior nodes in other areas, the system sends the area virtual nodes representing the specific area as a gateway in the DvR route TLV. When the system sends the DvR traffic to another DvR domain in a specific destination area, the system sends the traffic to the destination area‘s boundary nodes and the boundary nodes perform the route lookup and forward the traffic to the correct DvR domain in the destination area.
For information about configuring Multi-area SPB DvR backbone redistribution, see Configure Multi-area SPB DvR Backbone Redistribution.