Description

This document helps to troubleshoot when ospf is configured but not showing in neighbor table.

Symptoms

Customer added new link and ospf is not coming up.

We cant see neighbor configured in show ospf neighbor command.

lab-re0> show ospf neighbor 

lab-re0>

 

Solution

Below troubleshooting steps are followed to establish ospf neighborship. 
  • Execute command - "monitor traffic interface <interface name> extensive"
  • We can see incoming and outgoing packet captures in the output.
  • Reference KB for OSPF Packet Monitoring/Capture:https://supportportal.juniper.net/s/article/How-to-monitor-and-capture-ospf-traffic-on-an-interface
  • In this case, we checked the packet capture and compared advertised hello-interval value on outgoing OSPF packet and hello-interval on incoming OSPF packet.
  • Configured hello-interval using below command to match the hello interval values on both devices.

 

lab-re0# set protocols ospf area 0.0.0.0 interface ae14 hello-interval ?  

Possible completions:

 <hello-interval>   Hello interval (seconds) (1..255)

 

Modification History

2024-05-02 : Article Created

Related Information

Reference KB for OSPF Hello-Interval: https://supportportal.juniper.net/s/article/How-to-configure-ospf-hello-interval
Reference KB for OSPF Dead-Interval: https://supportportal.juniper.net/s/article/How-to-configure-ospf-dead-interval
Reference KB for OSPF Packet Monitoring/Capture:https://supportportal.juniper.net/s/article/How-to-monitor-and-capture-ospf-traffic-on-an-interface