title: Extreme  Networks Switch: Digital Optical Monitoring (DOM)
agents: snmp
author: alexander.vogel.2305@gmail.com
catalog: hw/network/netextreme
license: "GPLv2"
distribution: "check_mk"
description:
 This check monitors the optical receive and transmit signal power of Extreme
 Networks SFP/SFP+ optical modules via SNMP.
 
 The check creates one service per port and, for multi-channel transceivers, one
 service per port channel. Services are only discovered for operational DOM
 sensors on physical ports whose interface admin status is not disabled.
 
 The measured RX and TX optical power values are shown in dBm and are also
 provided as performance data.
 
 The check can either use the thresholds reported by the device itself or custom
 thresholds configured via the rule "Extreme Digital Optical Monitoring (DOM)".


item:
 The port number, optionally followed by the optical channel, for example
 "15" or "49 Channel 2".

discovery: 
 One service "DOM Port <item>" is discovered for each installed optical module
 with DOM functionality. For multi-channel optics, one service is discovered per
 channel.

 Ports with ifAdminStatus down/disabled are not discovered.