I am now in use BIRD in the ospf routing protocol, such as cisco router I want to use multiple processes on the ospf. This how to achieve it ? Such as cisco router multi-process examples: r1 (config) # router ospf 100 r1 (config-router) # network 192.168.3.0 0.0.0.255 area 0 r1 (config-router) # network 10.0.5.0 0.0.0.255 area 0 r1 (config-router) # exit r1 (config) # router ospf 101 r1 (config-router) # network 10.0.7.0 0.0.0.255 area 1 My configuration is as follows , but I do not know if this configuration is not multi-process approach. filter export_OSPF { if (source = RTS_STATIC && net = 0.0.0.0 / 0) then { print "net accepted:", net; ospf_metric2 = 20; accept; } reject; } # # protocol ospf ospf_1 { table tab_ospf_1; router id x.x.x.x debug all; export filter export_OSPF; import all; preference 200; area 0.0.0.0 { interface "gre0" { hello 10; retransmit 5; cost 10; transmit delay 1; dead count 4; wait 40; type pointopoint; # type pointomultipoint; # type broadcast; priority 0; authentication cryptographic; password "abc"; } ; } ; } # # protocol ospf ospf_2 { table tab_ospf_2; router id x.x.x.x; # Debug all; export filter export_OSPF; import all; preference 200; area 0.0.0.0 { interface "gre1" { hello 10; retransmit 5; cost 10; transmit delay 1; dead count 4; wait 40; type pointopoint; # type broadcast; # type pointomultipoint; priority 0; authentication cryptographic; password "abc"; } ; } ; } Thank you..