ISP Filter Policies--Effect is what?

John Fraizer 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              AMSISP
>Austin         Genuity & Internap
>SanFran         Genuity & Internap
>Tokyo                  TOKISP
>Sydney         SYDISP

John Fraizer
EnterZone, Inc

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