Check-Manual von interfaces

Traffic and Status of Network Interfaces

Distribution	Official part of Checkmk
Lizenz	GPLv2
Unterstützte Agenten	SNMP Hpux Solaris OpenVMS Agent_Ucs_Bladecenter AIX Hp_Msa

Under solaris and HP-UX, make sure you have the statgrab binary available on the monitored machine. Under HP-UX, you also need to activate the hpux_statgrab agent plugin.

This check monitors the operational status, link speed, traffic, packet counts, discards and errors of network interfaces by using the information provided by various SNMP MIBs or agent data. Applicable data is usually supported by all SNMP devices, such as routers, switches, firewalls and even operating systems such as Windows and Linux.

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.

Item

There are three allowed ways to specify an interface: its index {ifIndex}, its description {ifDescr} and its alias, which is the same as the description for this check.

Discovery

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.