The Routing Over Large Clouds Mailing List Archive by date[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Maybe RSVP and Q.2931, but not NHRP
> From owner-ion@nexen.com Wed May 29 15:11:41 1996 > Date: Wed, 29 May 1996 17:58:14 +0500 > From: jhalpern@us.Newbridge.com (Joel Halpern) > To: ercm20@tattoo.ed.ac.uk, manfredi@engr05.comsys.rockwell.com > Subject: Re: Maybe RSVP and Q.2931, but not NHRP > Cc: ion@nexen.com Joel wrote: > 1) Router-Host and Host-Router communication YES > 2) Heirarchy. In the presence of Heirarchy, we will abstract out the > ATM addresses of the lower level routers YES > 3) Virtual routers - the correct ATM destination for the traffic may not > actually be the router Exploded routers actually need something a with a bit more oomph than plain vanilla NHRP. In themselves, they are not a sufficient justification for why you still need NHRP when I-PNNI is around. > 4) Other routing protocols. Even if some of your routers run I-PNNI, > you want interoperability with other protocols (including OSPF and BGP.) In the same routing domain as I-PNNI? I hope not. I think what you are saying is you might want to run NHRP and OSPF in the same domain but that's nothing to do with Sam's question. > Also, even if the whole network is using BGP with the "Next-Hop" attribute, > the same kinds of issues apply. > > Neither PAR nor full I-PNNI get rid of NHRP. These are complementary > technologies. Although there are (useful, non-trivial) *deployment* scenarios where you would not want the bother (and expense) of running both I-PNNI and NHRP so they are not entirely complementary and there is some overlap. I distinguish between "complementary in a deployment" vs. "complementary in standards' development". [Distinguish this also from the debate over on the other channel about MPOA and I-PNNI: there I believe the answer is "they are complementary"]. > Thank you, > Joel M. Halpern jhalpern@newbridge.com > Newbridge Networks Inc. Andrew ******************************************************************************** Andrew Smith TEL: +1 408 764 1574 Bay Networks, Inc. FAX: +1 408 988 5525 Santa Clara, CA E-m: asmith@baynetworks.com ******************************************************************************** |
|