Dell S4820T Configuration Manual page 178

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 17. 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
178
Bidirectional Forwarding Detection (BFD)