Hi, community
Today, Let's solve the problem that BGP 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 BGP configurations on each device are correct. (router-id, as-number)
3. Check whether a routing policy or ACL is configured.
4. Check whether TCP port 179 is filtered.
5. Check whether packets are discarded on the interface. If packets are discarded, BGP packets are also discarded.
6. Run the debugging command to check the BGP packets exchanged between the two devices. (Check whether open update keeplive packets are received.)
7. Check whether loop-related alarms exist in the logbuffer and trapbuffer logs.
Sorry, the ENSP cannot view logs. Therefore, the related alarms in this document are used instead.
8. Check whether BGP-related alarms exist in the logbuffer and trapbuffer logs.
Sorry, the ENSP cannot view logs. Therefore, the related alarms in this document are used instead.
9. Check whether alarms related to IP address conflict exist in the logbuffer and trapbuffer logs.
Sorry, the ENSP cannot view logs. Therefore, the related alarms in this document are used instead.
10. Check whether the logbuffer and trapbuffer logs contain alarms indicating that the CPU usage increases.
Sorry, the ENSP cannot view logs. Therefore, the related alarms in this document are used instead.
11. Check the version. If the version is EOS, upgrade the version in time.
You are welcome to ask me any questions!
