Dear, I have a topology where each AS is represented by a BIRD router. But in the BIRD table of the routers. The announcements received are marked as IGP but all the BGP sessions are done between different ASes. Do you know why it occur? Follow an example about a prefix announced by two different ASes and marked as IGP origin in a third one. 10.3.1.0/24 unicast [SDNRTR 13:18:10.201] * (100) [AS65507i] via 192.168.1.1 on eth0 Type: BGP univ BGP.origin: *IGP* BGP.as_path: 65507 BGP.next_hop: 192.168.1.1 BGP.local_pref: 100 unicast [R6 21:25:23.642] (100) [AS65501i] via 192.168.7.2 on eth1 Type: BGP univ BGP.origin: *IGP* BGP.as_path: 65501 BGP.next_hop: 192.168.7.2 BGP.local_pref: 100