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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Establishing Sessions with OSPF Neighbors

BFD sessions can be established with all OSPF neighbors at once or sessions can be established with all neighbors out of a specific interface. Sessions are only established when the OSPF adjacency is in the Full state.

Figure 1. Establishing Sessions with OSPF Neighbors Illustration of establishing sessions with OSPF neighbors.

To establish BFD with all OSPF neighbors or with OSPF neighbors on a single interface, use the following commands.

  • Establish sessions with all OSPF neighbors. ROUTER-OSPF mode bfd all-neighbors
  • Establish sessions with OSPF neighbors on a single interface. INTERFACE mode ip ospf bfd all-neighbors

Example of Verifying Sessions with OSPF Neighbors

To view the established sessions, use the show bfd neighbors command.

The bold line shows the OSPF BFD sessions. 

R2(conf-router_ospf)#bfd all-neighbors
                                 R2(conf-router_ospf)#do show bfd neighbors
                                 
                                 *     - Active session role
                                 Ad Dn - Admin Down
                                 C     - CLI
                                 I     - ISIS
                                 O     - OSPF
                                 R     - Static Route (RTM)
                                 
                                 LocalAddr  RemoteAddr Interface State Rx-int Tx-int Mult Clients
                                 * 2.2.2.2  2.2.2.1    Gi 2/1    Up    200    200    3    O
                                 
                                 * 2.2.3.1  2.2.3.2    Gi 2/2    Up    200    200    3    O

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