Logging adjacency changes

  1. Enter the configure terminal command to access global configuration mode.
    device# configure terminal
  2. Enter the router isis command to enter IS-IS router configuration mode and enable IS-IS on the device.
    device(config)# router isis
    
  3. Enter the log adjacency command to enable the logging of adjacency changes.
    device(config-isis-router)# log adjacency
    

The following example enables the logging of adjacency changes.

device# configure terminal
device(config)# router isis
device(config-isis-router)# log adjacency