Poller not polling all device after migration


I recently migrated my Librenms from from RHEL 6 - RHEL 7 because of the php and python support.

I followed this doc -

Things went fine. system is working working for 67 of the 95 devices.

[root@librenms librenms]# ./validate.php

Component Version
LibreNMS 1.63-116-g5927983
DB Schema 2020_04_13_150500_add_last_error_fields_to_bgp_peers (164)
PHP 7.3.18
Python 3.6.8
MySQL 5.5.65-MariaDB
RRDTool 1.4.8

[OK] Composer Version: 1.10.6
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[root@librenms librenms]#

I have 26 devices that are reporting down which are actually up.

in GUI when i go to settings → poller it says 67 devices polled

The devices that are reporting down say that they were last polled when i shut the old serer down.


I have verified that the cron jobs are running and running correctly

Is there a cache i need to flush or something i need to force to get the 26 devices working?


Issue is fixed.

Turned out to be a DNS issue.