Reference Guide

Bidirectional Forwarding Detection (BFD) | 159
Configuring BFD for IS-IS
BFD for IS-IS is supported on the S5000 platform.
When using BFD with IS-IS, the IS-IS protocol registers with the BFD manager. BFD sessions are then
established with all neighboring interfaces participating in IS-IS. If a neighboring interface fails, the BFD
agent on the stack unit 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
• Change session parameters.
• Disable BFD sessions 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 8-7. Establishing Sessions with IS-IS Neighbors