[AusNOG] OSPF vs ISIS - Which do you prefer & why?

[Mark Smith]

It's getting quite old now however still interesting, as it is a
presentation by the major implementor of IS-IS and IIRC OSPF for Cisco, who
then went on to Juniper, and was also one of the people behind BFD.

*OSPF and IS-IS: A Comparative Anatomy*
https://www.nanog.org/meetings/abstract?id=1084

On 2 Sep 2016 08:18, "Mark Prior" <mrp at mrp.net> wrote:

> I think that the key thing is to go with the protocol that your support
> team know. I learned ISIS while doing my JNCIP and I didn't discover
> anything compelling while playing configuration games in my lab to make
> me want to make the change from OSPF (even when using OSPFv2 and v3) to
> ISIS. If your NOC staff have experience with both then it might be tough
> to choose one but if not go with the one they know and avoid angst :-)
>
> Mark.
>
> On 1/09/2016 22:34, Paul Wilkins wrote:
> > All I can say is that redistribution between IGPs is never the right
> > answer. OSPF works and is generally well understood.
> >
> > Kind regards
> >
> > Paul Wilkins
> >
> > On 1 September 2016 at 22:25, Michael Bullut <main at kipsang.com
> > <mailto:main at kipsang.com>> wrote:
> >
> >     Greetings Team,
> >
> >     ​While I haven't worked with IS-IS before but the only disadvantage
> >     I've encountered with OSPF is that it is resource intensive on the
> >     router it is running on which is why only one instance runs on any
> >     PE & P device on an ISP network. OSPF is pretty good in handling the
> >     core network routing while BGP & EGP handle the last-mile routing
> >     between PE & CE devices. BGP & EGP can run on top of OSPF. I came
> >     across this *article*
> >     <https://routingfreak.wordpress.com/2011/03/05/why-
> providers-still-prefer-is-is-over-ospf-when-designing-
> large-flat-topologies/>
> >     when scrolling the web a while back and I still want to find out if
> >     am the only one who thinks its a matter of choice between the two.
> >     Although there isn't distinct 1:1 argument, it's good we discuss it
> >     here and figure out why one prefer one over the other /(consider a
> >     huge flat network)//./ What say you ladies and gentlemen?
> >
> >     Warm regards,
> >
> >     Michael Bullut.
> >
> >     ---
> >
> >     *Cell:* /+254 723 393 114.
> >     /*Skype Name:* /Michael Bullut./
> >     /**///*Twitter:*//**@Kipsang <http://twitter.com/Kipsang/>
> >     //
> >     */*Blog: *//http://www.kipsang.com//*
> >     *E-mail:* /main at kipsang.com <mailto:main at kipsang.com>/
> >     *
> >     *
> >     /---/
> >
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