I am doing some networking using the Zebra software (v. .92a) and utilizing the OSPF protocol. I am relatively new to networking and I am having some trouble, I was hoping someone could point me in the right direction. I have set up two nodes and am trying to have them recognize each other as neighbors. In the output I get using tcpdump they seem to realize each other are there, but do not respond to each other's hello packets. I am almost positive it has something to do with the ospfd.conf and zebra.conf files, but I am stumped as to what. Here is some sample output from tcpdump: This is machine 1, its IP address is xxx.xxx.xx.124: 16:25:33.892934 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:25:43.900413 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: bac kbone dr XXX.XXX.XX.5[t tl 1] 16:25:43.900493 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:25:53.904721 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:25:53.904811 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:26:03.912189 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:03.912277 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:26:13.913076 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:13.913146 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:26:23.917278 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:23.917360 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ ttl 1] It is obviously seeing bot XXX.XXX.XX.5 and YYY.YY.Y.1, but does not register tehm into its topological database or as neighbors. This is machine 2, its IP address is xxx.xxx.xx.5, and its second IP address is YYY.YY.Y.1: 16:26:13.241212 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:26:23.244566 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:23.244657 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:26:33.244819 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:33.244926 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] 16:26:43.251487 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:43.251588 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0. 0.0.1 dr YYY.YY.Y.1 [ ttl 1] 16:26:53.254976 XXX.XXX.XX.5 > 224.0.0.5: OSPFv2-hello 44: backbone dr XXX.XXX.XX.5 [ttl 1] 16:26:53.255077 YYY.YY.Y.1 > 224.0.0.5: OSPFv2-hello 44: rtrid XXX.XXX.XX.5 area 0.0.0.1 dr YYY.YY.Y.1 [ttl 1] Here are some of the logs from the daemons: MACHINE 1 2002/07/05 16:14:15 OSPF: OSPFd (0.92a) starts 2002/07/05 16:14:15 OSPF: interface XXX.XXX.XX.124 join AllSPFRouters Multicast group. 2002/07/05 16:14:55 OSPF: DR-Election[1st]: Backup XXX.XXX.XX.124 2002/07/05 16:14:55 OSPF: DR-Election[1st]: DR XXX.XXX.XX.124 2002/07/05 16:14:55 OSPF: DR-Election[2nd]: Backup 0.0.0.0 2002/07/05 16:14:55 OSPF: DR-Election[2nd]: DR XXX.XXX.XX.124 2002/07/05 16:14:55 OSPF: interface XXX.XXX.XX.124 join AllDRouters M MACHINE 2 2002/07/05 13:54:24 OSPF: Terminating on signal 2002/07/05 16:13:51 OSPF: OSPFd (0.92a) starts 2002/07/05 16:13:51 OSPF: interface XXX.XXX.XX.5 join AllSPFRouters Multicast group. 2 002/07/05 16:13:51 O SPF: interface YYY.YY.Y.1 join AllSPFRouters Multicast group. 2002/07/05 16:14:31 OSPF: DR-Election[1st]: Backup XXX.XXX.XX.5 2002/07/05 16:14:31 OSPF: DR-Election[1st]: DR XXX.XXX.XX.5 2002/07/05 16:14:31 OSPF: DR-Election[2nd]: Backup 0.0.0.0 2002/07/05 16:14:31 OSPF: DR-Election[2nd]: DR XXX.XXX.XX.5 2002/07/05 16:14:31 OSPF: interface XXX.XXX.XX.5 join AllDRouters Multicast group. 2002/07/05 16:14:31 OSPF: DR-Election[1st]: Backup YYY.YY.Y.1 2002/07/05 16:14:31 OSPF: DR-Election[1st]: DR YYY.YY.Y.1 2002/07/05 16:14:31 OSPF: DR-Election[2nd]: Backup 0.0.0.0 2002/07/05 16:14:31 OSPF: DR-Election[2nd]: DR YYY.YY.Y.1 2002/07/05 16:14:31 OSPF: interface YYY.YY.Y.1 join AllDRouters Multicast group. And here are the .conf files from both: MACHINE 1 zebra.conf: ! ! Zebra configuration file ! hostname Router password zebra enable password zebra ! ! interface eth0 !Interface wi th External Network !ip address XXX.XXX.XX/24 ! Inet Add:XXX.XXX.XX.124 Mask:255.255.255.0 ! !interface eth1 !Interface to Intrnal Network !127.0.0.1 !Mask:255.0.0.0 ! log stdout ! ! MACHINE 1 ospfd.conf: ! ! Zebra configuration saved from vty ! 2002/07/03 15:44:54 ! hostname ospfd password zebra enable password zebra log file /usr/local/etc/ospfd.log log stdout ! ! ! interface eth0 ! interface eth1 ! interface lo ! interface tunl0 ! interface gre0 ! router ospf ospf router-id XXX.XXX.XX.124 passive-interface eth0 network XXX.XXX.XX.0/24 area 0 ! line vty ! MACHINE 2 zebra.conf: ! Zebra Configuration File ! hostname Router2 password zebra enable password zebra ! ! interface eth0 !Interface with External Network !ip address XXX.XXX.XX.0/24 ! Inet Add:XXX.XXX.XX.5 Mask:255.255.25 5.0 ! !inter face eth1 !Interface to Intrnal Network !127.0.0.1 !Mask:255.0.0.0 ! log stdout ! ! MACHINE 2 ospfd.conf ! ! Zebra configuration saved from vty ! 2002/07/03 15:41:55 ! hostname ospfd2 password zebra enable password zebra log file /usr/local/etc/ospfd2.log log std out ! ! ! interface lo ! interface eth0 ! interface vmnet1 ! interface vmnet8 ! interface ospfd ! interface ospfd2 description all ! router ospf network YYY.YY.Y.0/24 area 1 network XXX.XXX.XX.0/24 area 0 ! line vty ! I would really appreciate any advice you could offer me.