[53410] in North American Network Operators' Group
Re: disconnected autonomous systems
daemon@ATHENA.MIT.EDU (ren)
Wed Nov 13 16:49:57 2002
Date: Wed, 13 Nov 2002 16:45:27 -0500
To: Daniel Golding <dgold@FDFNet.Net>,
Scott Granados <scott@wworks.net>
From: ren <ren@internet.rockstar.org>
Cc: alex@yuriev.com, Richard A Steenbergen <ras@e-gerbil.net>,
<nanog@merit.edu>
In-Reply-To: <20021113151220.L82273-100000@paradox.fdfnet.net>
Errors-To: owner-nanog-outgoing@merit.edu
ASN per LATA to abide by the Telco Act of 1996...
SBC is rapidly shrinking the need down to a handful. 4 ASNs are in use at
IXs today. Next year that should be cut in half.
http://www.sbcbackbone.net/peering/
-ren
At 03:14 PM 11/13/2002 -0600, Daniel Golding wrote:
>Actually, most of the RBOC/ILEC's use completely seperate AS's. "FCC
>Regulation" being a legitimate reason to request a whole bushel of AS's
>from ARIN.
>
>Try doing an ARIN whois on bellsouth, and you get...
>
>Bellsouth.Net (AS7891) BELLSOUTH-NET-BLK2 7891 - 7894
>Bellsouth.Net (AS8060) BELLSOUTH-NET-BLK3 8060 - 8063
>BellSouth.net Inc. (AS6380) BELLSOUTH-NET-BLK 6380 - 6389
>
>- Dan
>
>
>On Wed, 13 Nov 2002, Scott Granados wrote:
>
> > 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
> > >
> > > --
> > >
> > >
> > >
> >
> >
