SPF/PRC timers for Fast Convergence
Init Wait: 1ms
- 5.5 sec faster than default reaction!
- Optimized for the going down mode
Exp Increment: S ms
- S = the time to run an SPF on this network
- eg. 50ms for a 400-node and 1200 leaves network
Max Wait: n * S ms
- During Churn, CPU utilization less than 10% due to ISIS => 100ms of ISIS per second => 2 SPF per second => Max Wait = 500ms. But minimum value is 1s.
router isis spf-interval 1 1 50 prc-interval 1 1 50