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TP-Link SNMP

Overview​

TP-Link is a provider of network access solutions.

The Centreon Monitoring Connector TP-Link SNMP relies on the SNMP protocol to query and collect the status and metrics of the TP-Link equipment.

Monitoring Connector assets​

Monitored objects​

  • CPU
  • Interfaces
  • Memory
  • Uptime

Collected metrics​

  • These 3 metrics for CPU core and average utilization
Metric nameDescriptionUnit
cpu.utilization.percentagePercentage of CPU utilization%

Prerequisites​

The SNMP agent must be configured and running. Please refer to the manufacturer documentation to achieve this. The Centreon Poller must be able to reach the UDP/161 SNMP port of the TP-Link equipment.

Installation​

  1. Install the Centreon package on every Centreon Poller expected to monitor TP-Link equipments:
yum install centreon-plugin-Network-Tplink-Snmp
  1. On the Centreon Web interface, install the TP-Link SNMP Monitoring Connector through Configuration > Monitoring Connectors Manager page.

Host configuration​

Create your Host and apply the Net-Tplink-SNMP-custom Host Template. You must set SNMP Community and Version in the dedicated fields of the Host Form.

When using SNMP v3, use the SNMPEXTRAOPTIONS Macro to add specific authentication parameters More information in the Troubleshooting SNMP section.

ObligatoireNomDescription
SNMPEXTRAOPTIONSConfigure your own SNMPv3 credentials combo

How to test my plugin and what do the main parameters stand for?​

Once the plugin is installed, you can test it by logging into the CLI with the centreon-engine user.

/usr/lib/centreon/plugins//centreon_tplink_snmp.pl \
    --plugin=network::tplink::snmp::plugin \
    --mode=cpu \    
    --hostname=10.30.2.11 \
    --snmp-community=centreon-tplink \
    --snmp-version=2c \
    --warning-average-5m=90 \
    --critical-average-5m=95 \
    --verbose
  
OK: 1 CPU(s) average usage is 7.00 % (5s) 20.00 % (1m) 10.00 % (5m) - CPU '1' usage 7.00 % (5s) 20.00 % (1m) 10.00 % (5m) | 
'cpu.utilization.5s.percentage'=7.00%;;;0;100 'cpu.utilization.1m.percentage'=20.00%;;;0;100 'cpu.utilization.5m.percentage'=10.00%;0:90;0:95;0;100 
'1#core.cpu.utilization.5s.percentage'=7.00%;;;0;100 '1#core.cpu.utilization.1m.percentage'=20.00%;;;0;100 '1#core.cpu.utilization.5m.percentage'=10.00%;;;0;100
CPU '1' usage 7.00 % (5s) 20.00 % (1m) 10.00 % (5m)

The command above check CPU usage for TP-Link equipment (--mode=cpu). Mandatory options are the IP/FQDN of the device (--hostname=10.30.2.11) and the SNMP version you have set on your equipment (--snmp-community='centreon-tplink').

This command would trigger a WARNING alarm if the CPU average to the equipment is greater than 90 (--warning-average-5m='90') and a CRITICAL alarm if the CPU average to the equipment is greater than 95 (--critical-average-5m='95').

All available options for a given mode can be displayed by adding the --help parameter to the command:

/usr/lib/centreon/plugins//centreon_tplink_snmp.pl \
    --plugin=network::tplink::snmp::plugin \
    --mode=cpu \
    --help

All plugin modes can be listed with the following command:

/usr/lib/centreon/plugins//centreon_tplink_snmp.pl \
    --plugin=network::tplink::snmp::plugin \
    --list-mode

Troubleshooting​

UNKNOWN: SNMP GET Request : Timeout​

If you get this error, it may indicate that some flows are blocked between the Centreon Poller and the TP-Link equipment. It can also mean that the Centreon Host Configuration doesn't reflect the SNMP configuration on the TP-Link side (version, community).

UNKNOWN: SNMP GET Request : Cant get a single value.​

You may get this error when SNMP privileges are not wide enough. You can check that the SNMP community used in your command line has enough rights to walk the TP-Link enterprise SNMP branch: .1.3.6.1.4.1.11863 You can use the snmpwalk utilities which is provided through the net-snmp package.