check-mk plugin for Cisco Digital Optical Monitoring

About

This check-mk package monitors the power level states of SFPs with Cisco DOM (DDM) support.

Install

Download the provided check-mk package file cisco_dom-x.y.mkp and install it using check-mk's package manager[1].

[1] https://mathias-kettner.de/checkmk_packaging.html#H1:Installation,%20Update%20and%20Removal

# check_mk -P install cisco_dom-x.y.mkp

Setup

This package enumerates entSensorValueTable, entPhysicalTable and entSensorThresholdTable from CISCO-ENTITY-SENSOR-MIB[2] to find transmit (Tx) and receive (Rx) power sensor levels. Any DOM aware SFP is detected once reinventoring it.

[2] http://tools.cisco.com/Support/SNMP/do/BrowseMIB.do?local=en&step=2&mibName=CISCO-ENTITY-SENSOR-MIB

Interfaces which are administrative shutdown report (critical) Rx values. You need to build ignore rules within check_mk to drop those services since it is not easily possible to detect if an interface is shutdown.