This document will explain how to use poller.php to debug issues or manually running to process data.

Command options

    LibreNMS 2014.master Poller

-h <device id> | <device hostname wildcard>  Poll single device
-h odd                                       Poll odd numbered devices  (same as -i 2 -n 0)
-h even                                      Poll even numbered devices (same as -i 2 -n 1)
-h all                                       Poll all devices

-i <instances> -n <number>                   Poll as instance <number> of <instances>
                                             Instances start at 0. 0-3 for -n 4

Debugging and testing options:
-r                                           Do not create or update RRDs
-d                                           Enable debugging output
-m                                           Specify module(s) to be run

-h Use this to specify a device via either id or hostname (including wildcard using *). You can also specify odd and even. all will run poller against all devices.

-i This can be used to stagger the poller process.

-r This option will suppress the creation or update of RRD files.

-d Enables debugging output (verbose output) so that you can see what is happening during a poller run. This includes things like rrd updates, SQL queries and response from snmp.

-m This enables you to specify the module you want to run for poller.

Poller config

These are the default poller config items. You can globally disable a module by setting it to 0. If you just want to disable it for one device then you can do this within the WebUI -> Settings -> Modules.

$config['poller_modules']['unix-agent']                   = 0;
$config['poller_modules']['os']                           = 1;
$config['poller_modules']['ipmi']                         = 1;
$config['poller_modules']['sensors']                      = 1;
$config['poller_modules']['processors']                   = 1;
$config['poller_modules']['mempools']                     = 1;
$config['poller_modules']['storage']                      = 1;
$config['poller_modules']['netstats']                     = 1;
$config['poller_modules']['hr-mib']                       = 1;
$config['poller_modules']['ucd-mib']                      = 1;
$config['poller_modules']['ipSystemStats']                = 1;
$config['poller_modules']['ports']                        = 1;
$config['poller_modules']['bgp-peers']                    = 1;
$config['poller_modules']['junose-atm-vp']                = 1;
$config['poller_modules']['toner']                        = 1;
$config['poller_modules']['ucd-diskio']                   = 1;
$config['poller_modules']['wifi']                         = 1;
$config['poller_modules']['ospf']                         = 1;
$config['poller_modules']['cisco-ipsec-flow-monitor']     = 1;
$config['poller_modules']['cisco-remote-access-monitor']  = 1;
$config['poller_modules']['cisco-cef']                    = 1;
$config['poller_modules']['cisco-sla']                    = 1;
$config['poller_modules']['cisco-mac-accounting']         = 1;
$config['poller_modules']['cipsec-tunnels']               = 1;
$config['poller_modules']['cisco-ace-loadbalancer']       = 1;
$config['poller_modules']['cisco-ace-serverfarms']        = 1;
$config['poller_modules']['netscaler-vsvr']               = 1;
$config['poller_modules']['aruba-controller']             = 1;
$config['poller_modules']['entity-physical']              = 1;
$config['poller_modules']['applications']                 = 1;
$config['poller_modules']['cisco-asa-firewall']           = 1;
$config['poller_modules']['mib']                          = 0;

Poller modules

unix-agent: Enable the check_mk agent for external support for applications.

system: Provides information on some common items like uptime, sysDescr and sysContact.

os: Os detection. This module will pick up the OS of the device.

ipmi: Enables support for IPMI if login details have been provided for IPMI.

sensors: Sensor detection such as Temperature, Humidity, Voltages + More.

processors: Processor support for devices.

mempools: Memory detection support for devices.

storage: Storage detection for hard disks

netstats: Statistics for IP, TCP, UDP, ICMP and SNMP.

hr-mib: Host resource support.

ucd-mib: Support for CPU, Memory and Load.

ipSystemStats: IP statistics for device.

ports: This module will detect all ports on a device excluding ones configured to be ignored by config options.

bgp-peers: BGP detection and support.

junose-atm-vp: Juniper ATM support.

toner: Toner levels support.

ucd-diskio: Disk I/O support.

wifi: WiFi Support for those devices with support.

ospf: OSPF Support.

cisco-ipsec-flow-monitor: IPSec statistics support.

cisco-remote-access-monitor: Cisco remote access support.

cisco-cef: CEF detection and support.

cisco-sla: SLA detection and support.

cisco-mac-accounting: MAC Address account support.

cipsec-tunnels: IPSec tunnel support.

cisco-ace-loadbalancer: Cisco ACE Support.

cisco-ace-serverfarms: Cisco ACE Support.

netscaler-vsvr: Netscaler support.

aruba-controller: Aruba wireless controller support.

entity-physical: Module to pick up the devices hardware support.

applications: Device application support.

cisco-asa-firewall: Cisco ASA firewall support.

mib: Support for generic MIB parsing.


Here are some examples of running poller from within your install directory.

./poller.php -h localhost

./poller.php -h localhost -m ports


To provide debugging output you will need to run the poller process with the -d flag. You can do this either against all modules, single or multiple modules:

All Modules

./poller.php -h localhost -d

Single Module

./poller.php -h localhost -m ports -d

Multiple Modules

./poller.php -h localhost -m ports,entity-physical -d

It is then advisable to sanitise the output before pasting it somewhere as the debug output will contain snmp details amongst other items including port descriptions.

The output will contain:

DB Updates

RRD Updates

SNMP Response