nanog mailing list archives

Re: disconnected autonomous systems


From: Scott Granados <scott () wworks net>
Date: Wed, 13 Nov 2002 13:09:01 -0800 (PST)


Aren't some reasons for using disconnected as's regulatory based ie the
bells etc?


On Wed, 13 Nov 2002 alex () yuriev com wrote:


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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