Install Guide

Table Of Contents
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 14. Establishing Sessions with IS-IS Neighbors
To establish BFD with all IS-IS neighbors or with IS-IS neighbors on a single interface, use the following commands.
Establish sessions with all IS-IS neighbors.
ROUTER-ISIS mode
bfd all-neighbors
Establish sessions with IS-IS neighbors on a single interface.
INTERFACE mode
isis bfd all-neighbors
To view the established sessions, use the show bfd neighbors command.
The bold line shows that IS-IS BFD sessions are enabled.
Changing IS-IS Session Parameters
BFD sessions are configured with default intervals and a default role.
The parameters that you can configure are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system
role. These parameters are configured for all IS-IS sessions or all IS-IS sessions out of an interface. If you change a parameter
globally, the change affects all IS-IS neighbors sessions. If you change a parameter at the interface level, the change affects all
IS-IS sessions on that interface.
To change parameters for all IS-IS sessions or for IS-IS sessions on a single interface, use the following commands.
Bidirectional Forwarding Detection (BFD)
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