mailing list archives
Re: ISP Filter Policies--Effect is what?
From: "Stephen J. Wilcox" <steve () opaltelecom co uk>
Date: Tue, 8 May 2001 19:58:09 +0100 (BST)
On Tue, 8 May 2001, John Fraizer wrote:
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
Ah, I got -snip- happy there :) in that case I would question the logic of
being given a large address block only to break it into pieces all over
I'd wonder why they dont take address space from a regional provider - if
its only /24 it cant be that mission critical for bgp and multihoming...
Site BGP Advertisement to ISP
Amsterdam 22.214.171.124/24 AMSISP
Austin 126.96.36.199/24 Genuity & Internap
SanFran 188.8.131.52/24 Genuity & Internap
Tokyo 184.108.40.206/24 TOKISP
Sydney 220.127.116.11/24 SYDISP
Stephen J. Wilcox
IP Services Manager, Opal Telecom
Tel: 0161 222 2000
Fax: 0161 222 2008