mailing list archives
Re: ISP Filter Policies--Effect is what?
From: John Fraizer <nanog () Overkill EnterZone Net>
Date: Tue, 8 May 2001 14:43:33 -0400 (EDT)
On Tue, 8 May 2001, Stephen J. Wilcox wrote:
if you have a /16 why would it be broken down to /24? i would assume the
only reason you advertise /24 is because that is the size of your
assignment from the NIC, in which case you cannot advertise the /16.
if you do own the /16 then yes of course you can advertise it.
Stephen, you neglected to look at the big picture. The "organization" has
the /16 but has sites spread out all over the planet and has assigned
/24's to them. Additionally, they connect into the global net via diverse
Site BGP Advertisement to ISP
Amsterdam 126.96.36.199/24 AMSISP
Austin 188.8.131.52/24 Genuity & Internap
SanFran 184.108.40.206/24 Genuity & Internap
Tokyo 220.127.116.11/24 TOKISP
Sydney 18.104.22.168/24 SYDISP