disconnected autonomous systems

Wed Nov 13 21:45:27 UTC 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 alex at 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
> > >
> > > --
> > >
> > >
> > >
> >
> >