Meru SNMP

Monitoring Connector Assets

Monitored Objects

The Monitoring Connector Meru SNMP collects metrics for:

• Alarms
• Cpu
• Interfaces
• Memory
• Wireless

Collected Metrics

Alarms

Metric name	Description	Unit
alarms.critical.count	Number of critical alarms
alarms.major.count	Number of major alarms
alarms.minor.count	Number of minor alarms

Cpu

Metric name	Description	Unit
cpu.utilization.percentage	CPU utilization	%

Interfaces

Metric name	Description	Unit
status	Status of the interface
interface_name#interface.traffic.in.bitspersecond	Incoming traffic going through the interface.	b/s
interface_name#interface.traffic.in.percentage	Percentage of the interface's in bandwidth usage	%
interface_name#interface.traffic.out.bitspersecond	Outgoing traffic going through the interface.	b/s
interface_name#interface.traffic.out.percentage	Percentage of the interface's out bandwidth usage	%

A regexp filter is available to target a specific interface identifier - ifName [--interface='^eth0$' --name]

Memory

Metric name	Description	Unit
memory.usage.bytes	Memory usage	B
memory.free.bytes	Free memory	B
memory.usage.percentage	Memory usage in percentage	%

Wireless

Metric name	Description	Unit
accesspoints.online.count	Number of online access points
stations.wireless.count	Number of wireless stations

Prerequisites

To control your Meru, the SNMP must be configured.

Setup

Online License

1. Install the Centreon Plugin on every Poller:

yum install centreon-plugin-Network-Meru-Snmp

2. On the Centreon Web interface in Configuration > Monitoring Connector Manager, install the Meru Networks SNMP Monitoring Connector

Offline License

1. Install the Centreon Plugin on every Poller:

yum install centreon-plugin-Network-Meru-Snmp

2. On the Centreon Central server, install the Centreon Monitoring Connector from the RPM:

yum install centreon-pack-network-meru-snmp

3. On the Centreon Web interface in Configuration > Monitoring Connector Manager, install the Meru Networks SNMP Monitoring Connector

Host configuration

• Add a new Host and fill the IP Address/FQDN, SNMP Version and SNMP Community fields according to the device's configuration
• Apply the Net-Meru-SNMP-Custom Host Template

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

Mandatory	Name	Description
	SNMPEXTRAOPTIONS	Configure your own SNMPv3 credentials combo

FAQ

How to test the Plugin and what are the main options for?

Once the plugin installed, log into your Centreon Poller CLI using the centreon-engine user account and test the Plugin by running the following command:

/usr/lib/centreon/plugins/centreon_meru_snmp.pl \
    --plugin=network::meru::snmp::plugin \
    --mode=wireless \
    --hostname=10.30.2.114 \
    --snmp-version='2c' \
    --snmp-community='meru_ro' \
    --critical-accesspoints-online='@19:19' \
    --verbose

Expected command output is shown below:

OK: number of online access points: 19 - number of wireless stations: 3 | 'accesspoints.online.count'=19;;@19:19;0; 'stations.wireless.count'=3;;;0;

The command above monitors Meru device (--plugin=network::meru::snmp::plugin --mode=wireless) identified by the IP address 10.30.2.114 (--hostname=10.30.2.114). As the Plugin is using the SNMP protocol to request the device, the related community and version are specified (--snmp-version='2c' --snmp-community='meru_ro').

This command would trigger a CRITICAL alarm if the number of online access points is above or below 19 (--critical-accesspoints-online='@19:19').

All the options as well as all the available thresholds can be displayed by adding the --help parameter to the command:

/usr/lib/centreon/plugins/centreon_meru_snmp.pl \
    --plugin=network::meru::snmp::plugin \
    --mode=wireless \
    --help

Troubleshooting

UNKNOWN: SNMP GET Request : Timeout

If you get this message, you're probably facing one of theses issues:

• The SNMP agent of the device isn't started or is misconfigured
• An external device is blocking the request (firewall, ...)

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

This error message often refers to the following issues:

• The agent doesn't support the MIB used by the plugin
• The targeted SNMP OID cannot be fetched because of insufficient privileges on the device. SNMP Agent must be capable of accessing to the enterprise branch: .1.3.6.1.4.1.15983