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Re: [Idr] WGLC on draft-ietf-idr-as-private-reservation-00

Robert Raszuk <robert@raszuk.net> Tue, 11 December 2012 19:20 UTC

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From: Robert Raszuk <robert@raszuk.net>
To: Jon Mitchell <jrmitche@puck.nether.net>, idr wg <idr@ietf.org>
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Subject: Re: [Idr] WGLC on draft-ietf-idr-as-private-reservation-00
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How about if we would take completely different approach ...

Based on number of use cases it seems to me like perhaps we should
just declare the top most bit in 4 octet AS space as indicator of
private vs public.

50% !

2^31 should be well sufficient for public use for a long time,
likewise for private use. Filtering/replacing also seems trivial.

Cheers,
R.

PS. I must say that I see nothing wrong with advertising private AS to
the public. It is just that no one should look at single atomic AS in
the AS_PATH. If you look at tuple of private AS + next AS what harm
does it cause to anyone including SIDR ?

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