Dell S4048T Configuration Manual page 189

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 18. 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
Bidirectional Forwarding Detection (BFD) 189