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. -- Jeff S Wheeler <jsw@inconcepts.biz> Sr Network Operator / Innovative Network Concepts