Hi, all I am building a BGP and OSPF network specified in RFC 3345 which will lead to a BGP oscillation. see below: --------------------------------------------------------------- / -------------------- -------------------- \ | / \ / \ | | | Cluster 1 | | Cluster 2 | | | | | | | | | | | *1 | | | | | Ra(RR) . . . . . . . . . . . . . . Rd(RR) | | | | . . | | . | | | | .*5 .*4 | | .*12 | | | | . . | | . | | | | Rb(C) Rc(C) | | Re(C) | | | | . . | | . | | | \ . . / \ . / | | ---.------------.--- ---------.---------- | \ .(10) .(1) AS1 .(0) / -------.------------.---------------------------.-------------- . . . ------ . ------------ . / \ . / \ . | AS10 | | AS6 | \ / \ / ------ ------------ . . . . . -------------- . / \ | AS100 |- 10.0.0.0/8 \ / -------------- The problem is, the router Rd does not perform as expected in selecting the best route. 10.199.0.0/16 via 10.1.7.2 on eth2 [SR 14:30] * (100-/5) [AS65002i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 65002 BGP.next_hop: 10.1.5.2 BGP.med: 1 BGP.local_pref: 100 BGP.originator_id: 10.1.4.2 BGP.cluster_list: 10.1.3.3 via 10.1.1.2 on eth3 [SC 14:29] (100/12) [AS65002i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 65002 BGP.next_hop: 10.1.1.2 BGP.med: 0 Should the second route in the above route table be better? as it has a lower med value with the local preference, AS path length and orgins. Thanks