North American Network Operators Group
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Re: disconnected autonomous systems

  • From: ren
  • Date: Wed Nov 13 16:51:39 2002

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 [email protected] 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
> >
> > --
> >
> >
> >
>
>