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:

For QSFPs and CFPs, DDM Temperature and Supply voltage is available only at the Module level as shown in Table 2.

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:

Supported real-time DDM features are summarized in Table 1.

Table 1. 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 Table 2.

Table 2. 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