Monitor Network Interfaces via Standard MIB Using 64-Bit Counters
|Distribution:||official part of Check_MK|
This check does the same as if but uses 64-bit counters from
the IF-MIB .188.8.131.52.184.108.40.206.1.1. This allows to correctly
monitor switch ports with a traffic of more then 2GB per check interval.
Also, this check can use ifAlias instead if ifDescr for retrieving
the admin-configured interface description. This is useful e.g. for HP ProCurve
switches which do not show that aliasses in ifDescr.
Note: This check needs SNMP v2c and thus only works if your hosts are
added to bulkwalk_hosts.
Depending on the check parameters, this check can go WARN or CRIT when the
port status changes (i.e. is down), when the link speed changes (e.g. a
port expected to be set to 1 GBit/s operates only at 100 MBit/s), when the
absolute or procentual traffic of a port exceeds certain levels or if the
rate of errors or discards exceeds configurable limits.
This check supports averaging the in- and outgoing traffic over a configurable
time range by using an exponentially weighted moving average - just as Linux
does for the CPU load averages. The averaging can be configured on a per-host
and per-interface base. Interfaces with averaging turned on yield two additional
performance values: the averaged in- and outgoing traffic in bytes. If you have
configured traffic levels, then those levels are applied to the averaged values.
This check also supports monitoring of the administrative status (ifAdminStatus),
however, by default, this option is deactivated to reduce SNMP traffic. To activate
the monitoring of the admin status, you have to configure Checkmk to fetch this
information. This is done by activating the section if64adm via the rule "Include
or exclude SNMP sections", which will lead to an increase in SNMP traffic of
Note that there are some devices with broken firmware which report that
they support 64-bit counters even though they do not. In such cases, use the rule
"Include or exclude SNMP sections" to disable the section if64. This will make
Checkmk fall back to the 32-bit interface check.
There are three allowed ways to specify an interface: its index ifIndex, its
description ifDescr and its alias ifAlias.
One service is created for each interface that fulfills configurable conditions
(rule "Network interface and switch port discovery").
By default, these are interfaces which are currently found up and are of type 6, 32,
62, 117, 127, 128, 129, 180, 181, 182, 205 or 229.
Grouping: In some situations, you do not want to monitor a single
interface but a group of interfaces that together form a pool.
This check supports such pools by defining groups. The data of all members is
accumulated and put together in a single grouped interface service.