Hi, I’m trying BFD with some Force10 S4810 routers, problem is that sessions only come up every 3 or 4 times I restart bird. Also if Force10 routers are restarted, some times the sessions do not come back up. Also I have to restart bird to get it to work - birdc configure does not do it. I tried with the sysctl -w net.ipv4.ip_local_port_range="49152 65535” but this does not help either. I’m not able to get more debug info from the force10 devices than this: working : Apr 14 14:50:07: %STKUNIT0-M:CP %OSPF-5-ADJCHG: Neighbour state changed.OSPF Process 1, Nbr 77.66.22.228 on interface Vl 3000 change state from LOADING to FULL 3d0h48m : OSPFINFO: Quick Enabling BFD for NBRIP 77.66.22.228 RTRID 77.66.22.228 3d0h48m : OSPFINFO: OSPF Enabling BFD for NBRIP 77.66.22.228 Interface Vl 3000 IfIndex 1107528632 3d0h48m : OSPFINFO: Bfd Parameters interval 0 min_rx 0 Mult 0 role 0 3d0h48m : OSPFINFO: Completed Enabling BFD for NBRIP 77.66.22.228 Apr 14 14:50:08: %STKUNIT0-M:CP %BFDMGR-1-BFD_STATE_CHANGE: Changed session state to Up for neighbor 77.66.22.228 on interface Vl 3000 (diag: NO_DIAG) 3d0h48m : OSPFINFO: Ospf got BFD msg 3d0h48m : OSPFINFO: Bfd Msg Type Up for interface Vl 3000 3d0h48m : OSPFINFO: BFD Msg Up for NBRIP 77.66.22.228 RTRID 77.66.22.228, nbr bfd state Init not working : Apr 14 14:49:46: %STKUNIT0-M:CP %OSPF-5-ADJCHG: Neighbour state changed.OSPF Process 1, Nbr 77.66.22.228 on interface Vl 3000 change state from LOADING to FULL 3d0h47m : OSPFINFO: Quick Enabling BFD for NBRIP 77.66.22.228 RTRID 77.66.22.228 3d0h47m : OSPFINFO: OSPF Enabling BFD for NBRIP 77.66.22.228 Interface Vl 3000 IfIndex 1107528632 3d0h47m : OSPFINFO: Bfd Parameters interval 0 min_rx 0 Mult 0 role 0 3d0h47m : OSPFINFO: Completed Enabling BFD for NBRIP 77.66.22.228 Any hints are greatly appreciated. Thanks Regards Kristoffer