[53397] in North American Network Operators' Group
Re: disconnected autonomous systems
daemon@ATHENA.MIT.EDU (alex@yuriev.com)
Wed Nov 13 15:53:24 2002
Date: Wed, 13 Nov 2002 15:59:51 -0500 (EST)
From: alex@yuriev.com
To: Richard A Steenbergen <ras@e-gerbil.net>
Cc: Daniel Golding <dgold@FDFNet.Net>, nanog@merit.edu
In-Reply-To: <20021113203726.GZ2456@overlord.e-gerbil.net>
Errors-To: owner-nanog-outgoing@merit.edu
> > inherently wrong with using a single AS in multiple locations, and
> > advertising discrete blocks of address space in each one. The best reason
> > to do this is for a network that you eventually plan to merge - it
> > eliminates issues of having to make major BGP configuration changes.
>
> Nothing inherently wrong with it if you're paying for transit, but good
> luck getting peering in multiple locations without presenting consistent
> views.
No problem at all. Use a tunnel.
Going back to the original question:
(A) Is there a reason have disconnected ASs? Sure. Does it make more sense
than using multiple AS numbers? No.
(B) Is there a reason to deaggregate? Absolutely. The biggest being rather
bad internal allocations practiced by networks.
Alex
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