[c-nsp] Link State Periodic SPF

[sthaug at nethelp.no]

> I would like to know about Link state Periodic SPF's , I have seen in Cisco IOS-XR and Juniper M/T -Series ( Junos) by default Periodic SPF runs every 15 minutes.
> 
> Going to concept of SPF whenever there is change in topology router runs SPF based on SPF interval configured. Also when LSP/LSA refreshes after certain period then during that time also router executes SPF's.Then what is the purpose of periodic SPF's . Can we disable the same , What kind of impact will be there ??

Why do you want to disable them? Also, I presume you are aware that SPF
already runs when there is a change in the topology.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no