ISP Filter Policies--Effect is what?
nanog at Overkill.EnterZone.Net
Tue May 8 18:43:33 UTC 2001
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 188.8.131.52/24 AMSISP
>Austin 184.108.40.206/24 Genuity & Internap
>SanFran 220.127.116.11/24 Genuity & Internap
>Tokyo 18.104.22.168/24 TOKISP
>Sydney 22.214.171.124/24 SYDISP
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