[c-nsp] BGP neighbor with more specific prefixes

[Randy]

--- On Tue, 9/13/11, Justin Krejci <jkrejci at usinternet.com> wrote:

> From: Justin Krejci <jkrejci at usinternet.com>
> Subject: [c-nsp] BGP neighbor with more specific prefixes
> To: "cisco-nsp" <cisco-nsp at puck.nether.net>
> Date: Tuesday, September 13, 2011, 5:08 PM
> Cisco Folks,
> 
> Internet Transit Providers
> Provider 1
> Provider 2
> Provider 3
> Provider 4
> 
> We have aggregated prefixes (/19's, /18's etc) currently
> advertised to
> providers 1-3 on a single router. We are bringing on
> provider 4 but want
> to advertise only a few individual /24's within those
> aggregated
> prefixes to provider 4 and then tag them no-export. No
> other
> advertisements to provider 4.
> 
> Can it just be done with the network command to include the
> more
> specific /24's and the filter out the more specific /24's
> with a
> prefix-list on our bgp sessions with providers 1-3 and
> filter out the
> aggregated /18's and /19's on our session with provider 4?
> 
> It seems like inject-map on the provider 4 neighbor
> statement might work
> as well.
> 
> Are there other more appropriate ways to accomplish this in
> IOS?
> 
> Thanks!