Changing the SPF timer

  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 spf-interval command with the level-1 parameter, specifying values for the max-wait , initial-wait , and second-wait parameters, to set the maximum interval in seconds between SPF recalculations, the initial SPF calculation delay, and the hold time between the first and second SPF calculation.
    device(config-isis-router)# spf-interval level-1 15 10000 15000
    

The following example specifies that the maximum interval in seconds between SPF recalculations is 15 seconds for Level 1 packets. The initial SPF calculation delay is 10000 milliseconds and the hold time between the first and second SPF calculation is 15000 millseconds.

device# configure terminal
device(config)# router isis
device(config-isis-router)# spf-interval level-1 15 10000 15000