Check-Manual von winperf_if

Windows: State and Performance of Network Interfaces

Distribution Official part of Checkmk
Lizenz GPLv2
Unterstützte Agenten Windows
This check monitors the operational status, link speed, traffic, packet counts, discards and errors of network interfaces of a Windows host using data sent by the Checkmk agent.

To get information about the link status and the MAC address, you need to deploy the agent plug-in wmic_if.bat into the plugins directory of your Checkmk agent for Windows. On servers with just one network interface, you probably won't need the information about the link status, since the agent will be unreachable anyway if the interface is not up. We propose to not install the plug-in in that case and save a few CPU resources.

The plug-in mk_dhcp_enabled.bat can be used to get a WARN if the ip address of the interface was assigned by dhcp. To check the current state of Windows bonding interfaces, you need to install the agent plug-in windows_if.ps1 on the target host. Without the plugin, this check will show 'Connected' as the operation state.

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.


There are three allowed ways to specify an interface: its index, which simply enumerates the interfaces, its description and its alias.


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 {Connected} 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.