[j-nsp] ispf support on Juniper routers

Phil Mayers p.mayers at imperial.ac.uk
Mon Mar 9 07:59:46 EDT 2009

Paul Goyette wrote:
> Having just recently looked at this area of the code, I can
> confirm that Juniper runs incremental SPF whenever possible

As I understand it, there are two types of ispf:

  * ISPF where the LSDB changes are type5 LSA i.e. at the leaves of the 
SPF tree, which can be done incrementally. I believe both IOS and JunOS 
do this by default?

  * the "extra" ispf that the Cisco IOS command does, which applies to 
type1/2 LSA changes:


Does JunOS do both or only the former?

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