Viewing SFP Information
  • 06 Jun 2024
  • 6 Minutes to read
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Viewing SFP Information

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Article summary

To view a summary of all SFPs

  1. Access the page Port ▶ SFP.
    Summary information for all SFPs currently detected by the Skylight sensor: control is displayed.

  2. (Optional) To limit the view to only certain SFPs, enter a value on which to filter, then click Search. You can filter by the port name, part number, serial number, wave length or speed.


    Note: Enter an asterisk ( * ) as a wildcard to replace one or several characters.

For more information on specific parameters, refer to the following tables.

SFP Information (Port ▶ SFP ▶ Configuration)

ParameterDescription
PresentAn indication of whether or not the SFP is present. Available options are:
  • Green: The SFP is present
  • Red: The SFP is not present
Port nameThe physical connector the port is using

If the physical connector is reported as Unknown, it means that the remote device is unlinked and that the information shown is cached from the last communication made with the remote device.

Part numberThe manufacturer’s part number or product name
Serial numberThe manufacturer’s serial number for the transceiver
WavelengthThe nominal transmitter wavelength at room temperature, expressed in nanometers
SpeedThe speed supported by the SFP, such as 1 Gbps or 10 Gbps.

The default setting is Automatic. In this case, the port speed is configured to the highest rate detected from the SFP. The user can, if needed, manually override the SFP speed by selecting a specific speed value.

To view detailed information for a specific SFP

  1. Access the page Port ▶ SFP.
    Summary information for all SFPs currently detected by the Skylight sensor: control is displayed.

  2. In the Port Name column of the table, click the SFP for which you want to view detailed information.
    The details pertaining to the selected SFP are displayed. The level of detail provided may vary, depending on if the SFP has been linked, authorized, etc.

For more information on specific parameters, refer to the following tables.

SFP Status Information (Port ▶ SFP ▶ Status ▶ [port name])
SFP Configuration

ParameterDescription
Force Link up

Enable this box to force SFP signals to the Up state. The value indicated here persists across reboots.
Laser

(Optical ports only)

The laser on the device's port can be set to either ON or OFF
  • Selected: The laser is enabled, ON
  • Not Selected: The laser is disabled, OFF
Tx Disable

(Skylight sensor: SFP compute 1G 2 Copper only)

Data transmission on the device's port can be disabled by selecting this box
  • Selected: Data transmission is disabled
  • Not Selected: Data transmission is enabled

SFP or Fiber Information

ParameterDescription
Connector TypeThe external cable connector provided as the media interface
VendorThe manufacturer name

This is a 16-character field that contains ASCII characters, padded on the right with ASCII spaces (20h).

Wave LengthIndicates the nominal transmitter wavelength at room temperature, expressed in nanometers
Part numberThe manufacturer part number or product name

This is a 16-byte field that contains ASCII characters, padded on the right with ASCII spaces (20h).

Serial numberThe manufacturer serial number for the transceiver

This is a 16-character field that contains ASCII characters, padded on the right with ASCII spaces (20h).

RevisionThe manufacturer’s product revision

This is a 16 character field that contains ASCII characters, padded on the right with ASCII spaces (20h).

SFP presentIndicates the presence of a recognized SFP
DiagnosticsSupported or unsupported

A value of supported indicates that diagnostic information is provided in the SFP memory section.

CalibrationInternal: The values are calibrated to absolute measurements, which should be interpreted according to the “Internal Calibration” convention

External: The values are A/D counts, which are converted into real units according to the “External Calibration” convention.

ThresholdsIndicates whether alarm and warning thresholds are supported
SpeedThe speed supported by the SFP, such as 1 Gbps or 10 Gbps

Two values are displayed:

  • Actual: The speed at which this SFP is currently operating
  • Detected: The speed, as obtained by SFP detection

Monitoring Information

ParameterDescription
TemperatureTransceiver temperature, measured internally

Temperature accuracy is manufacturer-specific, but must be better than 3 degrees Celsius for the specified operating temperature and voltage.

Supply VoltageTransceiver supply voltage, measured internally

Note: Transmitter supply voltage and receiver supply voltage are isolated in some transceivers. In that case, only one supply is monitored. Refer to the device specifications for details.

Laser Bias CurrentCoupled TX output power, measured internally

Accuracy is manufacturer-specific but must be better than 3 dB for the specified operating temperature and voltage.

Data is assumed to be based on measurement of a laser monitor photo-diode current. Data is not valid when the transmitter is disabled.

Receive PowerReceived optical power, measured internally

Accuracy depends on the exact optical wavelength. For the manufacturer’s specified wavelength, accuracy should be better than 3 dB for the specified temperature and voltage.

This accuracy should be maintained for input power levels up to the lesser of maximum transmitted or maximum received optical power per the appropriate standard. It should be maintained down to the minimum transmitted power minus cable plant loss (insertion loss or passive loss) per the appropriate standard. Accuracy beyond this minimum required received input optical power range is manufacturer specific.

Transmit PowerCoupled TX output power, measured internally.

Accuracy is manufacturer-specific but must be better than 3 dB for the specified operating temperature and voltage. Data is assumed to be based on measurement of a laser monitor photodiode current. Data is not valid when the transmitter is disabled.

SFP Thresholds (Port ▶ SFP ▶ Status ▶ [port name])

ParameterDescription
TemperatureHigh Alarm: High-temperature alarm for the transceiver

Low Alarm: Low-temperature alarm for the transceiver

High Warning: High-temperature warning for the transceiver

Low Warning: Low-temperature warning for the transceiver

VccHigh Alarm: High-supply voltage alarm for the transceiver expressed in millivolts

Low Alarm: Low-supply voltage alarm for the transceiver expressed in millivolts

High Warning: High-supply voltage warning for the transceiver expressed in millivolts

Low Warning: Low-supply voltage warning for the transceiver expressed in millivolts

Laser Bias CurrentHigh Alarm: High-laser bias current alarm for the TX, expressed in microamperes

Low Alarm: Low-laser bias current alarm for the TX, expressed in microamperes

High Warning: High-laser bias current warning for the TX, expressed in microamperes

Low Warning: Low-laser bias current warning for the TX, expressed in microamperes

Tx PowerHigh Alarm: High-output power alarm for the TX (~ -40 dBm to +8.2 dBm)

Low Alarm: Low-output power alarm for the TX (~ -40 dBm to +8.2 dBm)

High Warning: High-output power warning for the TX (~ -40 dBm to +8.2 dBm)

Low Warning: Low-output power warning for the TX (~ -40 dBm to +8.2 dBm)

Rx PowerHigh Alarm: High-input power alarm for the RX (~ -40 dBm to +8.2 dBm)

Low Alarm: Low-input power alarm for the RX (~ -40 dBm to +8.2 dBm)

High Warning: High-input power warning for the RX (~ -40 dBm to +8.2 dBm)

Low Warning: Low-input power warning for the RX (~ -40 dBm to +8.2 dBm)

SFP Memory Information (Port ▶ SFP ▶ Status ▶ [port name])

  • SFP Memory (Location: A0h)
    The SFP memory field provides a hexadecimal dump of the digital diagnostic memory map at address A0h. Refer to SFF-8472 for detailed descriptions of the individual data fields.

  • Monitor Memory (Location: A2h)
    The Monitor memory field provides a hexadecimal dump of the digital diagnostic memory map at address A2h. Refer to SFF-8472 for detailed descriptions of the individual data fields.

  • Copper PHY Config Memory (Location: ACh or A2h)
    The Copper PHY config memory field provides a hexadecimal dump of the PHY memory map at address ACh. Refer to the copper SFP vendor's specification for detailed descriptions of the individual data fields.

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