BGP announcements and small providers

If the downstream customers are not multihomed, there's no reason
to run BGP with them; a simple default/static will work just fine.
Also, if you suballocate addresses to them from within your address
space, you can aggregate them.

This is generally considered a Good Thing.

- paul

Isn't it true though that some upstream providers (such as Sprint) filter
out anything smaller than /19 and will not carry those routes? Therefore
in this example, Sprint clients would not be able to see these smaller
providers and vice versa unless he agregates them to /19 or higher and
then announces the routes himself?


* David Papp | 4907-99 Street | Ph: +1.403.430.0811 *
* Manager | Edmonton, Alberta | Fax: +1.403.436.9963 *
* OA Internet Inc. | Canada, T6E 4Y1 | Email: *

Would it be possible to get a copy of the Sprint filters and the AGIS ones
too, posted at so that people can be referred to them
for the precise details on what is being filtered.

Michael Dillon - Internet & ISP Consulting
Memra Software Inc. - Fax: +1-250-546-3049 - E-mail: