Disabling partial SPF optimizations

You can configure IS-IS to perform a full SPF calculation when any network (non-topology) change occurs. This task disables partial SPF optimizations.

1. Access global configuration mode.
   

   device# configure terminal

2. Enter IS-IS router configuration mode and enable IS-IS on the device.
   

   device(config)# router isis
   

3. Disable partial SPF optimizations.
   

   device(config-isis-router)# disable-partial-spf-opt