Hi, community
Today, Let's solve the problem that OSPF neighbor relationships cannot be established. If you have any suggestions or comments, please let me know.
1. Check the connectivity between devices and run the ping command to check whether the unicast link is normal.
2. Check whether the OSPF configurations between devices are correct, such as the OSPF process ID, router ID, area ID, and network address.
3. Check the hello time of the device. If the hello time is inconsistent, the device cannot enter the 2-way state. ( Other devices ignore pictures.)
4. Check whether the OSPF status reaches 2-way. (If a fault occurs, check whether the OSPF status is stuck in 2-way.)
5. Check whether packets are discarded on the interface. If packets are discarded, OSPF packets are discarded.
6. Check the MTU of the device interface to check whether packet loss is caused by large packets.( You can also ping large packets to check whether packet loss occurs.)
7. Check whether the link types of the devices at both ends are the same. (If the link types are inconsistent, OSPF neighbor relationships cannot be established.)
8. Check OSPF packets and check whether error packets exist.
9. Check whether the OSPF LSDB can receive the LSDB from the peer end.
10. Check whether OSPF-related alarms exist in the logbuffer and trapbuffer logs.
The ENSP does not support the function of viewing logs. You can run the display logbuffer | in OSPF command to view the logbuffer.
11. Check whether alarms related to IP address conflict exist in the logbuffer and trapbuffer logs.
The ENSP does not support the function of viewing logs. You can run the display logbuffer | in ARP command to view the logbuffer.
12. Check the version. If the version is EOS, upgrade the version in time. (The version of the ENSP device is very old. The actual version prevails.)
