NBMA Environments

• Each router has a PVC (Permanent Virtual Circuit) with all the other routers.
• This guarantees all routers have a connection to each other and can participate in a DR/BDR election.
• Once the election is complete, the meshed network will act as a BMA network.
• All LSA’s are sent to the DR and BDR. The DR then floods the updates out every interface.
• The problem here is if a PVC (especially between the DR and BDR) fails, connections between other adjacent peers will fail too.

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