Hi, IIRC, bird added your local ASN before export filter, so 64515 is neither first nor last in ASN Path, and it isn't exactly only 64515 in the path. I suggest to use something like: if bgp_path ~ [= * 64515 * =] then reject; This should reject any bgp_path contains AS 64515. HTH, tim On Tue, Sep 19, 2017 at 10:50:47AM +0200, Marek Królikowski wrote:
Hello guys, I got strange problem with BGP i share data to Collector but i put to reject some bgp path....
This is how look configuration of BGP session of Collector:
protocol bgp Collector { description "Collector"; local as MY-ASN; source address IPv61; neighbor IPV62 as SOMEONE-ASN; multihop; import none; export filter { if bgp_path.first = 64515 then reject; if bgp_path = 64515 then reject; if bgp_path.last = 64515 then reject; include "export.conf"; }; }
But: root@pl-bgp:~# birdc6 show route export Collector all 2a0b:e206::/32 BIRD 1.6.3 ready. 2a0b:e206::/32 via 2a06:1287:330e:16::2 on bgp-fr [France 2017-09-18] * (100) [AS21430i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: MY-ASN 64515 20473 1299 21430 BGP.next_hop: 2a07:XXXX.XXXX.XXXX BGP.local_pref: 100 BGP.community: (64515,44)
Like You see in BGP path there is 64515. How i export this to Collector if i put reject on export? What is wrong?
I use BIRD 1.6.3.
Best Regards Marek Krolikowski
-- Tim Weippert http://weiti.org - weiti@weiti.org GPG Fingerprint - E704 7303 6FF0 8393 ADB1 398E 67F2 94AE 5995 7DD8