Question about filters

[Marek Wajdzik]

Misunderstood :-). I want to sell traffic to Peer5 from peers 1,2,3
without global internet connection. (Only internet exchange points
traffic).

2011/1/18 Martin Barry <marty at supine.com>:
> $quoted_author = "Marek Wajdzik" ;
>>
>> I have a small problem with the configuration shown in the diagram below
>>
>> BGP_Peer1 ---\
>> BGP_Peer2 ----> --- My_BGP_Router ---- BGP_Peer5
>> BGP_Peer3 ---/
>> BGP_Peer4 --/
>>
>> From BGP_Peer4 I've getting a full routing table. Peers 1,2,3 are
>> internet exchange points. How to write filter for BGP_Peer5 to export
>> only routes wich I get from Peers 1,2,3 (only routes to ix points,
>> without global internet connection).
>
> Communities.
>
> Check to see if the routes from the exchanges are already tagged with a
> specific community. If not, add a community to routes received from that
> exchange's peers or route server.
>
> Then filter the routes you are sending to peer 5 to only those tagged with
> the appropriate communities.
>
> cheers
> Marty
>