OSPF vs IS-IS

Sat Aug 13 02:05:52 UTC 2011

On 8/12/11 8:29 AM, Jeff Wheeler wrote:
> I thought I'd chime in from my perspective, being the head router
> jockey for a bunch of relatively small networks.  I still find that
> many routers have support for OSPF but not IS-IS.  That, plus the fact
> that most of these networks were based on OSPF before I took charge of
> them, in the absence of a compelling reason to change to another IGP,
> keeps me from taking advantage of IS-IS.  I'd like to, but not so
> badly that I am willing to work around those routers without IS-IS, or
> weight that feature more heavily when purchasing new equipment.
>
> There are many routers with OSPF but no IS-IS.  I haven't seen any
> with IS-IS but no OSPF.  I don't think such router would be very
> marketable to most non-SP networks.
TRILL supports IS-IS.  It seems it may play a role beyond the router.
http://tools.ietf.org/html/rfc6326

-Doug