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Re: BGP-4+

Curtis Villamizar <curtis@ans.net> Fri, 20 December 1996 16:49 UTC

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Message-Id: <199612201606.LAA28790@brookfield.ans.net>
To: Yakov Rekhter <yakov@cisco.com>
Cc: "John W. Stewart III" <jstewart@metro.isi.edu>, skh@merit.edu, 6bone@isi.edu, dkatz@cisco.com, bgp@ans.net
Reply-To: curtis@ans.net
Subject: Re: BGP-4+
In-Reply-To: Your message of "Wed, 18 Dec 1996 14:27:54 PST." <199612182227.OAA19295@puli.cisco.com>
Date: Fri, 20 Dec 1996 11:06:31 -0500
From: Curtis Villamizar <curtis@ans.net>
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In message <199612182227.OAA19295@puli.cisco.com>om>, Yakov Rekhter writes:
> John,
>  
> > under what circumstances does a router send SNPAs? and
> > what does a router do on receipt of SNPAs?
> 
> One possible application for SNPA is operation of BGP over NBMA (e.g.,
> ATM). Passing SNPA allows to avoid any additional mechanisms to resolve
> IP to SNPA mapping in the NBMA environment.

This is a very worthwhile addition to BGP.

Its amazing no one ever thought of this before.  :-)

> > also, from reading the draft, i'm assuming that you plan
> > to support only ASs and not RDs? did you consider typing
> > routing domains in addition to network addresses?
> 
> I am a bit confused - in my mind "RD" and "AS" describe
> pretty much similar thing. 

Its just a matter of the number of bits.

There are still more electrons in the universe than covered by the AS
number space.  :-)

Besides, on a BGP/IDRP border (in case anyone ever uses IDRP)
you'd need the additional bits to carry an IDRP RD.

> Yakov.

Curtis

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