Network devices can be monitored through use of the following monitoring plugins.
mackerel-plugin-snmp
Retrieve arbitrary MIB information with SNMP and post as a metric.
SNMP Trap monitoring is not supported.
check-ping
Check ICMP communication and have alerts issued when interrupted.
Plugins must be installed on and configured for a host installed with the mackerel-agent. For information on how to install and configure plugins, refer to the following documentation.