Users Guide

on the line card notifies the BFD manager, which in turn notifies the IS-IS protocol that a link state change
occurred.
Configuring BFD for IS-IS is a two-step process:
1 Enable BFD globally.
2 Establish sessions for all or particular IS-IS neighbors.
Related Configuration Tasks
• Changing IS-IS Session Parameters
• Disabling BFD for IS-IS
Establishing Sessions with IS-IS Neighbors
BFD sessions can be established for all IS-IS neighbors at once or sessions can be established for all
neighbors out of a specific interface.
Figure 15. Establishing Sessions with IS-IS Neighbors
Bidirectional Forwarding Detection (BFD) 178