Information
Digital Optical Monitoring (DOM) is an industry wide standard, intended to define a digital interface to access real-time operating parameters such as:
- Optical Tx Power
- Optcal Rx Power
- Laser Bias Current
- Temperature
- Transceiver Supply Voltage
With the use of DOM, we are able to perform transceiver monitoring and troubleshooting operations in regards to SFPs that WiscNet deploys on CPE or hub devices.
Note that many 1g optics do not support DOM so there may be no readings. We strive to use optics that support DOM on all vendors devices, such as FlexOptix when programmed appropriately.
Commands
Cisco
show interfaces transceiver
Juniper
show interfaces diagnostics optics <interface>
Brocade
show optic 1/1/x
*Requires 'optical-monitor' to be in the interface config. It only lets you put it in if it likes the optic. Also will only show DOM when an interface is already linked AND after a minute or so.
HP
show interfaces transceiver <> detail
Opengear
sfp_info
Additional Information
Trending
Both Observium and GNMIS will trend DOM data over time.
- Observium
- Find the device and interface, it should show up as a sensor.
- Direct link to all DOM sensors in observium
- GNMIS
- Uses the SNMP MIB name as the dataset, so varies by vendor.
- Juniper
- jnxDomCurrentRxLaserPower / jnxDomCurrentTxLaserPower (native) OR jnxUtilReceivePowerdBm if SLAX script based
- GNMIS link to these datasets
- Cisco
entSensorValue
- GNMIS link to these datasets