I have meet a problem in ospf, i have two sites with 2 routers running ospf, configuration is basic, 2 router connect each other over 1 tunnel GRE. In normal, ospf is running well, but when i "shutdown" tunnel of 2 router and "no shut" it active again, but ospf is not running again, i troubleshoot and i see:
"Oct 26 01:33:52.362: %OSPF-5-ADJCHG: Process 1, Nbr 172.16.2.1 on Tunnel15 from DOWN to DOWN, Neighbor Down: Ignore timer expired
:12.338: %OSPF-5-ADJCHG: Process 1, Nbr 172.16.2.1 on Tunnel15 from EXCHANGE to DOWN, Neighbor Down: Too many retransmissions" . OSPF process is reaching Exchange state but it is not Fullloading. I wonder why ??
So, Everone know that is, or have the same erro, could help me