Digital Diagnostics Monitoring
Some Nokia SFPs, XFPs, QSFPs, CFPs and the MSA DWDM transponder have the Digital Diagnostics Monitoring (DDM) capability where the transceiver module maintains information about its working status in device registers including:
temperature
supply voltage
transmit (TX) bias current
TX output power
received (RX) optical power
For QSFPs and CFPs, DDM Temperature and Supply voltage is available only at the Module level as shown in DDM alarms and warnings.
See the Statistics collection section for details about the QSFP and CFP example DDM and DDM Lane information.
For the QSFPs and CFPs, the number of lanes is indicated by DDM attribute ‟Number of Lanes: 4”.
Subsequently, each lane threshold and measured values are shown per lane.
If a lane entry is not supported by the specific QSFP or CFP specific model, then it is shown as ‟-‟ in the entry.
An example QSFP and CFP lane information is provided below:
Transceiver Data
Transceiver Type : QSFP+
Model Number : 3HE06485AAAA01 ALU IPUIBMY3AA
TX Laser Wavelength: 1310 nm Diag Capable : yes
Number of Lanes : 4
Connector Code : LC Vendor OUI : e4:25:e9
Manufacture date : 2012/02/02 Media : Ethernet
Serial Number : 12050188
Part Number : DF40GELR411102A
Optical Compliance : 40GBASE-LR4
Link Length support: 10km for SMF
===============================================================================
Transceiver Digital Diagnostic Monitoring (DDM)
===============================================================================
Value High Alarm High Warn Low Warn Low Alarm
-------------------------------------------------------------------------------
Temperature (C) +35.6 +75.0 +70.0 +0.0 -5.0
Supply Voltage (V) 3.23 3.60 3.50 3.10 3.00
===============================================================================
===============================================================================
Transceiver Lane Digital Diagnostic Monitoring (DDM)
===============================================================================
High Alarm High Warn Low Warn Low Alarm
Lane Tx Bias Current (mA) 78.0 75.0 25.0 20.0
Lane Rx Optical Pwr (avg dBm) 2.30 2.00 -11.02 -13.01
-------------------------------------------------------------------------------
Lane ID Temp(C)/Alm Tx Bias(mA)/Alm Tx Pwr(dBm)/Alm Rx Pwr(dBm)/Alm
-------------------------------------------------------------------------------
1 - 43.5 - 0.42
2 - 46.7 - -0.38
3 - 37.3 - 0.55
4 - 42.0 - -0.52
===============================================================================
Transceiver Type : CFP
Model Number : 3HE04821ABAA01 ALU IPUIBHJDAA
TX Laser Wavelength: 1294 nm Diag Capable : yes
Number of Lanes : 4
Connector Code : LC Vendor OUI : 00:90:65
Manufacture date : 2011/02/11 Media : Ethernet
Serial Number : C22CQYR
Part Number : FTLC1181RDNL-A5
Optical Compliance : 100GBASE-LR4
Link Length support: 10km for SMF
===============================================================================
Transceiver Digital Diagnostic Monitoring (DDM)
===============================================================================
Value High Alarm High Warn Low Warn Low Alarm
-------------------------------------------------------------------------------
Temperature (C) +48.2 +70.0 +68.0 +2.0 +0.0
Supply Voltage (V) 3.24 3.46 3.43 3.17 3.13
===============================================================================
===============================================================================
Transceiver Lane Digital Diagnostic Monitoring (DDM)
===============================================================================
High Alarm High Warn Low Warn Low Alarm
-------------------------------------------------------------------------------
Lane Temperature (C) +55.0 +53.0 +27.0 +25.0
Lane Tx Bias Current (mA) 120.0 115.0 35.0 30.0
Lane Tx Output Power (dBm) 4.50 4.00 -3.80 -4.30
Lane Rx Optical Pwr (avg dBm) 4.50 4.00 -13.00 -16.00
-------------------------------------------------------------------------------
Lane ID Temp(C)/Alm Tx Bias(mA)/Alm Tx Pwr(dBm)/Alm Rx Pwr(dBm)/Alm
-------------------------------------------------------------------------------
1 +47.6 59.2 0.30 -10.67
2 +43.1 64.2 0.27 -10.31
3 +47.7 56.2 0.38 -10.58
4 +51.1 60.1 0.46 -10.37
===============================================================================
The transceiver is programmed with warning and alarm thresholds for low and high conditions that can generate system events. These thresholds are programmed by the transceiver manufacturer.
There are no CLI commands required for DDM operations, however, the show>port port-id detail command displays DDM information in the Transceiver Digital Diagnostics Monitoring output section.
DDM information is populated into the router’s MIBs, so the DDM data can be retrieved by Network Management using SNMP. Also, RMON threshold monitoring can be configured for the DDM MIB variables to set custom event thresholds if the factory-programmed thresholds are not at the wanted levels.
The following are potential uses of the DDM data:
optics degradation monitoring
With the information returned by the DDM-capable optics module, degradation in optical performance can be monitored and trigger events based on custom or the factory-programmed warning and alarm thresholds.
link or router fault isolation
With the information returned by the DDM-capable optics module, any optical problem affecting a port can be quickly identified or eliminated as the potential problem source.
Supported real-time DDM features are summarized in Real-time DDM information.
| Parameter | User units | SFP/XFP units | SFP | XFP | MSA DWDM |
|---|---|---|---|---|---|
Temperature |
Celsius |
C |
✓ |
✓ |
✓ |
Supply Voltage |
Volts |
µV |
✓ |
✓ |
|
TX Bias Current |
mA |
µA |
✓ |
✓ |
✓ |
TX Output Power |
dBm (converted from mW) |
mW |
✓ |
✓ |
✓ |
RX Received Optical Power4 |
dBm (converted from dBm) (Avg Rx Power or OMA) |
mW |
✓ |
✓ |
✓ |
AUX1 |
parameter dependent (embedded in transceiver) |
✓ |
|||
AUX2 |
parameter dependent (embedded in transceiver) |
✓ |
The factory-programmed DDM alarms and warnings that are supported are summarized in DDM alarms and warnings.
| Parameter | SFP/XFP units | SFP | XFP | Required? | MSA DWDM |
|---|---|---|---|---|---|
Temperature - High Alarm - Low Alarm - High Warning - Low Warning |
C |
Yes |
Yes |
Yes |
Yes |
Supply Voltage - High Alarm - Low Alarm - High Warning - Low Warning |
µV |
Yes |
Yes |
Yes |
No |
TX Bias Current - High Alarm - Low Alarm - High Warning - Low Warning |
µA |
Yes |
Yes |
Yes |
Yes |
TX Output Power - High Alarm - Low Alarm - High Warning - Low Warning |
mW |
Yes |
Yes |
Yes |
Yes |
RX Optical Power - High Alarm - Low Alarm - High Warning - Low Warning |
mW |
Yes |
Yes |
Yes |
Yes |
AUX1 - High Alarm - Low Alarm - High Warning - Low Warning |
parameter dependent (embedded in transceiver) |
No |
Yes |
Yes |
No |
AUX2 - High Alarm - Low Alarm - High Warning - Low Warning |
parameter dependent (embedded in transceiver) |
No |
Yes |
Yes |
No |
SFPs and XFPs
The availability of the DDM real-time information and the warning and alarm status is based on the transceiver. It may or may not indicate that DDM is supported. Although some Nokia SFPs support DDM, Nokia has not required DDM support in releases before Release 6.0. Non-DDM and DDM-supported SFPs are distinguished by a specific value in their EEPROM.
For SFPs that do not indicate DDM support in their EEPROM, DDM data is available although the accuracy of the information has not been validated or verified.
For non-Nokia transceivers, DDM information may be displayed, but Nokia is not responsible for formatting, accuracy, and so on.
Statistics collection
The DDM information and warnings and alarms are collected at one minute intervals, so the minimum resolution for any DDM events when correlating with other system events is one minute.
In the Transceiver Digital Diagnostic Monitoring section of the show port port-id detail command output:
if the present measured value is higher than either or both of the High Alarm and High Warn thresholds, an exclamation mark ‟!” displays along with the threshold value
if the present measured value is lower than either or both of the Low Alarm and Low Warn thresholds, an exclamation mark ‟!” displays along with the threshold value
B:SR7-101# show port 2/1/6 detail
......
===============================================================================
Transceiver Digital Diagnostic Monitoring (DDM), Internally Calibrated
===============================================================================
Value High Alarm High Warn Low Warn Low Alarm
-------------------------------------------------------------------------------
Temperature (C) +33.0+98.0 +88.0 -43.0-45.0
Supply Voltage (V) 3.31 4.12 3.60 3.00 2.80
Tx Bias Current (mA)5.7 60.0 50.00.1 0.0
Tx Output Power (dBm) -5.45 0.00 -2.00 -10.50 -12.50
Rx Optical Power (avg dBm) -0.65-3.00! -4.00! -19.51 -20.51
===============================================================================