OSPF Flapping

17 Feb 2021

      Hi all,

We have 2 bird 2.0.7 instances rpm package running on vmware with MTU 9000

The only issue I cannot find is why they sessions are flapping:
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.126 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.125 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.126 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.125 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.126 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.125 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done
3w0d: %OSPF-5-ADJCHG: Process 1, Nbr 10.200.2.126 on
TenGigabitEthernet0/2/0 from LOADING to FULL, Loading Done

Below the relevant confi:

10.200.2.126
protocol ospf OSPF37697 {
       ipv4 {
              import none;
               export none;
      };
        rfc1583compat yes;
        area 0 {
                networks {10.200.2.0/25;};
                stub no;
                interface "*" {

                        hello 10;
                        dead 40;
                        #dead count 100;
                        retransmit 5;
                        type ptmp;
                        #real broadcast yes;
                        authentication simple;
                        password "Maputo12";
                        };
                };
        }

OSPF Flapping

Délsio Cabá