[53405] in North American Network Operators' Group
Re: disconnected autonomous systems
daemon@ATHENA.MIT.EDU (Daniel Golding)
Wed Nov 13 16:16:31 2002
Date: Wed, 13 Nov 2002 15:14:21 -0600 (CST)
From: Daniel Golding <dgold@FDFNet.Net>
To: Scott Granados <scott@wworks.net>
Cc: alex@yuriev.com, Richard A Steenbergen <ras@e-gerbil.net>,
<nanog@merit.edu>
In-Reply-To: <Pine.GSO.4.44.0211131308310.27263-100000@mailpod.wworks.net>
Errors-To: owner-nanog-outgoing@merit.edu
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
> >
> > --
> >
> >
> >
>
>
