I am currently learning OSPF and i have a hard time identifying what went wrong in my configuration. I use packet tracer to simulate my Frame Relay (1 hub & 2 spokes) with the following condition.
1. Hub will be able to ping Spoke 1 & Spoke 2 but spoke to spoke will not be able to ping each other.
2. Hub will be the DR and there will be no BDR.
Here is my configuration for Hub and Spoke 1 and Spoke 2 :
Hub FR Configuration
interface Serial2/0
ip address 172.12.123.1 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 102
frame-relay interface-dlci 103
Spoke 1 FR Configuration
interface Serial2/0
ip address 172.12.123.2 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 201
ip ospf priority 0
Spoke 2 FR Configuration
interface Serial2/0
ip address 172.12.123.3 255.255.255.0
encapsulation frame-relay
frame-relay interface-dlci 301
ip ospf priority 0
However when I try to configure my OSPF i got this error.
Hub(config-router)#neighbor 172.12.123.2
Hub(config-router)#neighbor 172.12.123.3
Hub(config-router)#network 172.12.123.0 0.0.0.255 area 0
Hub(config-router)#% OSPF: Configured Nbr 172.12.123.2 is incompatible with OSPF network type on Serial2/0
00:18:39:%OSPF-4-CFG_NBR_INVALID_NET_TYPE: Can not use configured neighbor 172.12.123.2 on Serial2/0. Neighbor command only allowed on NBMA and P2MP networks.
Can anyone tell me what went wrong? Attached is the diagram of my network.
P.S. When i try to add attached another router to my hub with subnet 10.1.1.0/24 and I enable OSPF this happened
Hub(config-router)#network 10.1.1.0 0.0.0.255 area 0
Hub(config-router)#
00:23:03: %OSPF-5-ADJCHG: Process 1, Nbr 10.1.1.1 on FastEthernet1/0 from LOADING to FULL, Loading Done
00:23:39: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on Serial2/0 from LOADING to FULL, Loading Done
00:23:39: %OSPF-5-ADJCHG: Process 1, Nbr 3.3.3.3 on Serial2/0 from LOADING to FULL, Loading Done
Hub#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.1.1.1 1 FULL/DR 00:00:31 10.1.1.1 FastEthernet1/0
3.3.3.3 0 FULL/DROTHER 00:01:51 172.12.123.3 Serial2/0
2.2.2.2 0 FULL/DROTHER 00:01:36 172.12.123.2 Serial2/0
