Re: [Idr] Re: Last Call: 'Canonical representation of 4-byte AS numbers' to Informational RFC (draft-michaelson-4byte-as-representation)
Joe Abley <jabley@ca.afilias.info> Tue, 10 October 2006 14:16 UTC
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From: Joe Abley <jabley@ca.afilias.info>
Subject: Re: [Idr] Re: Last Call: 'Canonical representation of 4-byte AS numbers' to Informational RFC (draft-michaelson-4byte-as-representation)
Date: Tue, 10 Oct 2006 09:16:40 -0500
To: Scott Leibrand <sleibrand@internap.com>
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Cc: idr@ietf.org, John Leslie <john@jlc.net>, iesg@ietf.org
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On 10-Oct-2006, at 08:05, Scott Leibrand wrote: > On 10/09/06 at 11:09pm -0500, Joe Abley <jabley@ca.afilias.info> > wrote: > >> But then how do you distinguish between a 2-byte only AS number and a >> 4-byte AS number which happens to be less than 0.65535? > > There is no meaningful distinction, is there? In terms of resource allocation, it seems to me that you only have to deal with 32-bit numbers, and no distinction is necessary. In terms of presentation to an operator, e.g. as part of a "show" command, it also seems like whatever is simplest and easier on the eye wins. (I would note that on cisco routers it's perfectly possible to view community string attributes as simple 32-bit numbers, but everybody seems to prefer the representation of two 16-bit values separated by a colon.) In terms of encoding values into a wire format to include in a BGP attribute, though, might it not be important for the router to know which was intended? Perhaps not; I'm not a router vendor, and I'm not presupposing an answer. Joe _______________________________________________ Idr mailing list Idr@ietf.org https://www1.ietf.org/mailman/listinfo/idr
- [Idr] Last Call: 'Canonical representation of 4-b… The IESG
- [Idr] Re: Last Call: 'Canonical representation of… John Leslie
- Re: [Idr] Re: Last Call: 'Canonical representatio… Joe Abley
- Re: [Idr] Re: Last Call: 'Canonical representatio… Scott Leibrand
- Re: [Idr] Re: Last Call: 'Canonical representatio… Bill Fenner
- RE: [Idr] Re: Last Call: 'Canonical representatio… Bruno Rijsman
- Re: [Idr] Re: Last Call: 'Canonical representatio… Joe Abley
- Re: [Idr] Re: Last Call: 'Canonical representatio… Geoff Huston
- Re: [Idr] Last Call: 'Canonical representation of… John G. Scudder
- Re: [Idr] Last Call: 'Canonical representation of… Iljitsch van Beijnum
- Re: [Idr] Last Call: 'Canonical representation of… Iljitsch van Beijnum
- Re: [Idr] Last Call: 'Canonical representation of… Curtis Villamizar
- Re: [Idr] Re: Last Call: 'Canonical representatio… Vince Fuller
- Re: [Idr] Last Call: 'Canonical representation of… Curtis Villamizar
- Re: [Idr] Last Call: 'Canonical representation of… Joe Abley