> On Jan 10, 2018, at 10:52 AM, Noel Chiappa via cctalk <cctalk@classiccmp.org> > wrote: > >> From: Paul Koning > >> That was then adopted by OSI as IS-IS, and further tweaked to become >> OSPF. > > Err, no. OSPF was not a descendant of IS-IS - it was a separate development, > based mainly on the ARPANET's original link state routing. (I can't recall if > John Moy and I took a lot from the later 'area' version of the ARPANET link > state, although we knew of it.) I think we became aware of IS-IS as OSPF > progressed, and IIRC John 'borrowed' a few ideas (maybe the sequence number > thing).
That may be the story, but I don't believe it. Contemporary accounts have it that he started from a draft IS-IS spec. paul