[c-nsp] BGP neighbor route-map or prefix-list ?

Jeffrey G. Fitzwater jfitz at Princeton.EDU
Fri Sep 16 10:06:54 EDT 2011


I have been using the ( neighbor xxx.xxx.xxx.xxx prefix-lit myPrefix out ) to control what prefixes we announce to our  ISPs.

I now have a need to do a little more prefix filter control using ( neighbor xxx.xxx.xxx.xxx route-map myRouteMap out ) .


Can I just do all the PREFIX filtering using the ( neighbor xxx.xxx.xxx.xxx route-map myRouteMap out )  and remove the ( neighbor xxx.xxx.xxx.xxx prefix-lit myPrefix out )?


Is there any reason to keep the ( neighbor xxx.xxx.xxx.xxx prefix-lit myPrefix out ) bgp command or is it just redundant with the route-map command?


I just need to do more control on what PREFIXES get advertised to our peers.





Thanks for any help.



Jeff Fitzwater
OIT Network Systems
Princeton University


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