DL10 documentation

Noel Chiappa jnc at mercury.lcs.mit.edu
Wed Jan 10 09:52:17 CST 2018

    > 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

IS-IS was later evolved to handle both OSI and IP addresses (and has, I
assume, since been extended to handle IPv6 too).


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