Subject: Re: Re: [Isis-wg] Strange p2p adjacencies

From: "appallar" <[email-masked]>
Date: Sat, 08 Jan 2005 02:42:09 -0500

Hello,

 In a broadcast medium, there could be multiple routers connected, hence we need to know which routers are L1 and which are L2 so we have two types of hellos to keep track of all L1 and L2 routers, where as in p2p network, we have only one system on the other end, hence we need to know the system type of the neighbor and have adjacency as L1 or L2 or L12.

Suryanarayana 

"Hannes Gredler"<[email-masked]> wrote:
On Tue, Dec 28, 2004 at 06:26:52PM +0530, Abhishek Verma wrote:
| Hemanth,
| 
| This tells me why we can have only one kind of adjacency in P2P links.
| And thanks for that!
| 
| But why is this so? Why has ISIS been so designed? Why do we then have
| 2 kinds of adjacencies in Broadcast media?
| 
| Any clues?

the original idea was to save bandwidth on low-bandwidth links;

given that most IS-IS adjacencies these days run on fat pipes
and control-plane processors have suffiecient CPU 
IMHO the once optimization does more harm (e.g. confusion about
per-Level passwords etc.) than good.

/hannes

_______________________________________________
Isis-wg mailing list
[email-masked]
https://www1.ietf.org/mailman/listinfo/isis-wg
-------------------------------------------------------------------------
Email Powered and Protected by IronPort and Sophos
Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com

 Buy The Best In BOOKS at http://www.bestsellers.indiatimes.com

Bid for for Air Tickets @ Re.1 on Air Sahara Flights. Just log on to http://airsahara.indiatimes.com and Bid Now!

_______________________________________________
Isis-wg mailing list
[email-masked]
https://www1.ietf.org/mailman/listinfo/isis-wg