Re: Intra-AS Routing Standards

[vcerf at NRI.Reston.VA.US]

Gary,

I think you have a good point. The dual support question seems 
premature to me although Tony Lauck makes the point that if 
you don't give that serious consideration up front, you wind
up implementing two protocols (implicit in your going-in
position that OSPF is the initial IP routing protocol).

The reasoning is something like: everyone will do IS-IS, so
you have to implement at least that. If you don't want to
implement OSPF, also, you need to do IS-IS for IP and to
make things efficient, you want one protocol running which
routes both flavors of packet.

I don't have any experience with IS-IS although NSFNET has
a level-2 only version running in the backbone. OSPF is
running in SURANET and perhaps some other nets. Your line
of reasoning would let us get experience with both so we
would have some data on which to base a comparison.

Vint