How to test and verify NFS connectivity when there are intermittent NFS mounted errors

• PAN-OS 7.1 and above.
• Any Panorama.

1. Check System log for NFS mount errors using GUI: Monitor > Logs> System. Use the filter "description contains NFS mounted" to filter NFS mount issues.

2. Check what directories have NFS mount. Identify server and the NFS mount path as seen below.

Panorama(primary-active)> show system disk-space

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3             7.9G  3.1G  4.5G  41% /
/dev/sda5              24G   11G   12G  49% /opt/pancfg
/dev/sda6             6.0G  1.4G  4.3G  25% /opt/panrepo
tmpfs                 2.0G  110M  1.9G   6% /dev/shm
cgroup_root           2.0G     0  2.0G   0% /cgroup
/dev/sda8             585G  433G  153G  74% /opt/panlogs
server_ha2n2_nfs:/server_t2_panorama_logs_vol/server_t2_panorama_logs_qt                    <<NFS mount
                      585G  433G  153G  74% /mnt/dynamic-logs

3. Check if the NFS mount has any failure errors.

Panorama(primary-active)> show system nfs dynamic-logging-partition failures
No failures so far

4. Test NFS mount 

Panorama(primary-active)> test nfs dynamic-logging-partition server server_ha2n2_nfs logdirectory /server_t2_panorama_logs_vol/server_t2_panorama_logs_qt
Test results : All tests passed.

5. If the errors are seen in step 3 or the test results fail on step 4, then the NFS mount needs to be troubleshot for disk errors or connectivity. Follow the troubleshooting steps by the NFS Server Vendor. In the above example, it is server_ha2n2_nfs.