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BGP partial routes

We are preparing new hw that will allow us to receive bgp routes =96 currently we=92re just broadcasting. However, we know that our supervisor 32 engine does not have the capability to receive the entire internet routing table. One approach I=92m familiar with is only receiving routes for peers directly connected to the provider.

Can you verify if this is a correct approach for example, w/ internap?

ip as-path access-list 100 permit ^12182_[0-9]* (sj) ip as-path access-list 100 permit ^13789_[0-9]* (ny)

route-map inap-announce-in permit 10 match as-path 100

=2E..if we're peered with 3 tier 1 isps, how many routes might we expect to receive?

Reply to
linguafr
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try

^12182_?[0-9]*$

remember to entering Ctrl-V before entering the ?

Reply to
Merv

OBTW you should requet that your ISP only advertise partials to you so that you router does not hav to filter full routes - leave the as path filters for partials in place though

Also make sure to filter for you own networks in the inbound filters to protect your network

Reply to
Merv

Why '?' in the as-path acl? Good pt about filtering out our networks. I guess just ip as-path access-list 101 deny ** would work, no?

Reply to
linguafr

You should have an inbound filter to block your network assigned blocks; not by AS.

Reply to
Merv

Also get both ISP to advertise default to you and make sure you inbound filter permits default.

Reply to
Merv

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