Controllers are represented in the rack/slot/instance/port format (r/s/i/p); for example, 0/3/0/1. Each port has an optics controller that is created on startup.

Note	You must shut down the optics controller before you perform any of the following tasks: Configure the controller Restore a saved configuration Upgrade the DSP processor or CFP2 optics module Field Programmable Device (FPD)

Coherent DSP controllers can be placed in maintenance mode. Use the controller coherentDSP secondary-admin-state maintenance command to place controllers in maintenance mode.

Use the show controllers optics r/s/i/p command to view optics parameter values, laser state, controller state, admin state, and trunk alarms on the card, and threshold values for the different optics parameters.

Use the show controllers coherentDSP r/s/i/p command to view the DSP controller state and alarm status and statistics.

Note	In maintenance mode, all alarms are suppressed and the show alarms command does not display alarm details. However, traffic is not affected in maintenance mode.

Note	The FEC is disabled for 25G and 50G optics in NC57-MPA-12L-S MPA when connected on 55A2-MOD-SE-S/-SE-H-S router, and in Line card NC57-MOD-S while verifying the FEC status using show controllers { TwentyfiveGigE | FiftyGigE }

Performance monitoring (PM) parameters are used by service providers to gather, store, set thresholds for, and report performance data for early detection of problems. The user can retrieve both current and historical PM counters for the various controllers in 30-second, 15-minute, and 24-hour intervals.

PM for optical parameters include input signal power and transmit power, optical signal-to-noise ratio, chromatic dispersion, polarization dependent loss, second order polarization mode dispersion, differential group delay, and transmitter laser bias current.

PM for DSP parameters include:

• FEC: error corrected bits, uncorrectable blocks, pre-FEC BER (block errors ratio)

• OTN: errored seconds, severely effected seconds, unavailable seconds, failed counts

These parameters simplify troubleshooting operations and enhance data that can be collected directly from the equipment.

This section contains the following procedures:

Execute the show controllers coherentDSP command to display status and configuration information for interfaces configured as coherent DSP controllers.

Router#show controllers coherentDSP 0/0/0/13
Thu May 27 06:56:37.505 UTC

Port                                            : CoherentDSP 0/0/0/13
Controller State                                : Up
Inherited Secondary State                       : Normal
Configured Secondary State                      : Normal
Derived State                                   : In Service
Loopback mode                                   : None
BER Thresholds                                  : SF = 1.0E-5  SD = 1.0E-7
Performance Monitoring                          : Enable
Bandwidth                                       : 400.0Gb/s

Alarm Information:
LOS = 32        LOF = 0 LOM = 0
OOF = 0 OOM = 0 AIS = 0
IAE = 0 BIAE = 0        SF_BER = 0
SD_BER = 0      BDI = 0 TIM = 0
FECMISMATCH = 0 FEC-UNC = 0     FLEXO_GIDM = 0
FLEXO-MM = 0    FLEXO-LOM = 0   FLEXO-RDI = 0
FLEXO-LOF = 43
Detected Alarms                                 : None

Bit Error Rate Information
PREFEC  BER                                     : 8.5E-04
POSTFEC BER                                     : 0.0E+00
Q-Factor                                        : 9.90 dB

Q-Margin                                        : 2.70dB

OTU TTI Received

Execute the show controllers optics command to display status and configuration information about the interfaces configured as optics controller.

Router#show controllers optics 0/0/0/7
 Controller State: Up
 Transport Admin State: In Service
 Laser State: On
 LED State: Green
 FEC State: FEC ENABLED
 Optics Status
         Optics Type:  QSFPDD 400G ZR
         DWDM carrier Info: C BAND, MSA ITU Channel=61, Frequency=193.10THz,
         Wavelength=1552.524nm
         Alarm Status:
         -------------
         Detected Alarms: None
         LOS/LOL/Fault Status:
         Alarm Statistics:
         -------------
         HIGH-RX-PWR = 0            LOW-RX-PWR = 0
         HIGH-TX-PWR = 0            LOW-TX-PWR = 0
         HIGH-LBC = 0               HIGH-DGD = 0
         OOR-CD = 0                 OSNR = 55
         WVL-OOL = 0                MEA  = 0
         IMPROPER-REM = 0
         TX-POWER-PROV-MISMATCH = 0
         Laser Bias Current = 0.0 
         Actual TX Power = -8.16 dBm
         RX Power = -7.85 dBm
         RX Signal Power = -7.55 dBm
         Frequency Offset = 5 MHz
         Performance Monitoring: Enable
         THRESHOLD VALUES
         ----------------
         Parameter                 High Alarm  Low Alarm  High Warning  Low Warning
         ------------------------  ----------  ---------  ------------  -----------
         Rx Power Threshold(dBm)          1.9      -28.2           0.0        -25.0
         Tx Power Threshold(dBm)          0.0      -15.0          -2.0        -16.0
         LBC Threshold(mA)               0.00       0.00          0.00         0.00
         Temp. Threshold(celsius)       80.00      -5.00         75.00        15.00
         Voltage Threshold(volt)         3.46       3.13          3.43         3.16
         LBC High Threshold = 98 %
         Configured Tx Power = -6.00 dBm
         Configured CD High Threshold = 80000 ps/nm
         Configured CD lower Threshold = -80000 ps/nm
         Configured OSNR lower Threshold = 9.00 dB
         Configured DGD Higher Threshold = 80.00 ps
         Baud Rate =  59.8437500000 GBd
         Modulation Type: 16QAM
         Chromatic Dispersion 2 ps/nm
         Configured CD-MIN -2400 ps/nm  CD-MAX 2400 ps/nm
         Second Order Polarization Mode Dispersion = 87.00 ps^2
         Optical Signal to Noise Ratio = 36.30 dB
         Polarization Dependent Loss = 0.40 dB
         Polarization Change Rate = 0.00 rad/s
         Differential Group Delay = 2.00 ps
         Temperature = 51.00 Celsius
         Voltage = 3.36 V
 Transceiver Vendor Details
         Form Factor            : QSFP-DD
         Optics type            : QSFPDD 400G ZR
         Name                   : CISCO-ACACIA
         OUI Number             : 7c.b2.5c
         Part Number            : DP04QSDD-E20-19E
         Rev Number             : 10
         Serial Number          : ACA2449003P
         PID                    : QDD-400G-ZR-S
         VID                    : ES03
         Firmware Version       : 61.12
         Date Code(yy/mm/dd)    : 20/12/03