Re: [Idr] new ID on expansion of private use ASN range

Jeffrey Haas <jhaas@pfrc.org> Tue, 03 July 2012 12:21 UTC

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Date: Tue, 03 Jul 2012 08:21:57 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: Randy Bush <randy@psg.com>
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References: <20120702164834.GB13713@puck.nether.net> <20120702184737.GV18361@pfrc> <20120703015521.GB22452@puck.nether.net> <CAL9jLaY3iO7-4v7DUSAy28zEkRpShqgbDBCeBegcy8HsdH2N-A@mail.gmail.com> <20120703110954.GC10161@pfrc> <m2pq8d3xg6.wl%randy@psg.com> <20120703114913.GA11403@pfrc> <m2mx3h3vnw.wl%randy@psg.com>
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Subject: Re: [Idr] new ID on expansion of private use ASN range
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On Tue, Jul 03, 2012 at 08:56:35PM +0900, Randy Bush wrote:
> ok, so let's see if i have it correctly.
> 
> the case you are trying to support is the use of a private asn for a
> customer who is bgp multihomed to a single isp,

Or small set of providers using a coordinated internal space.

> and that provider has
> more than 1024 of this kind of customer.  and the asns can not be
> re-used because they need as-loop prevention so can not turn as-loop
> detection off?

There's that opex thing again.  You'd have to track which customers are in
sites that need to communicate with each other and make sure not to re-use
numbers for those customer subsets. 

More numbers means less operational complexity.

-- Jeff