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

[Jeffrey G. Fitzwater]

Thanks for the info.   That clears that up.


Jeff
On Sep 16, 2011, at 10:26 , Kevin Epperson wrote:

> Typically the route-map is used to do attribute manipulation (i.e. match these prefixes and change this attribute) and the prefix-list applied to a neighbor is used for permit/deny of prefixes.  You could however embed the prefix-list in the route-map -- completely up to you.
> 
> Another reason to keep the prefix-list direct on the neighbor is that you might reuse a route-map across multiple neighbors but the prefix-list might be common to only one neighbor.
> 
> It should work either way though :)  Let me know if you have some specific examples and I can take a looksie at it.
> 
> 	-Kevin
> 
> On Fri, 16 Sep 2011, Jeffrey G. Fitzwater wrote:
> 
>> 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
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>