Interface and Hardware Component Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 7.3.x
Bias-Free Language
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Cisco offers a range of the new 400G Digital Coherent QSFP-DD optical modules. The two optical modules that are available
are:
QDD-400G-ZR-S
QDD-400G-ZRP-S
This chapter describes the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules and their supported configurations. The following
routers, line cards, from the indicated Cisco IOS XR software releases, support these two optical modules.
Table 1. Routers and Line Cards That Support QDD-400G-ZR-S and QDD-400G-ZRP-S Optical Modules from Indicated Cisco IOS XR Software
Releases
Fixed-Port Routers
QDD-400G-ZR-S and QDD-400G-ZRP-S Supported From IOS XR Software Release
NCS-57B1-6D24H-S
Release 7.3.2
NCS-57B1-5D24H-SE
Release 7.3.2
Line Cards
QDD-400G-ZR-S and QDD-400G-ZRP-S Supported From IOS XR Software Release
NC57-24DD
Release 7.3.2
NC57-18DD-SE
Release 7.3.2
NC57-36H6D-S
Release 7.3.2
Note
QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules are supported on all 400G ports of fixed-port routers.
QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules are supported only on 400G even-numbered ports (at the top row) of the line
cards. In addition, the following points describe the limitations of specific line cards:
NC57-24DD: All twelve 400G even-numbered ports support QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules.
NC57-18DD-SE: Up to a maximum of nine QDD-400G-ZR-S or six QDD-400G-ZRP-S optical modules are supported in the 400G even-numbered
ports.
NC57-36H6D-S: Up to a maximum of six QDD-400G-ZR-S or six QDD-400G-ZRP-S optical modules are supported in the 400G even-numbered
ports.
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules enable wavelength-division multiplexing (WDM) functionality in the router.
These optical modules are DWDM C-band (196.1 THz to 191.3 THz) tunable optical modules. They can be used in both transponder
and muxponder modes.
Cisco IOS XR software creates optics and coherent DSP controllers to configure and monitor the performance of the QDD-400G-ZR-S
and QDD-400G-ZRP-S optical modules. Optics controllers are used to configure and monitor optical parameters, such as frequency,
chromatic dispersion, transmitted output power, modulation, and so on. Coherent DSP controllers are used to monitor network
performance parameters like pre- and post-forward error correction (FEC) bit-error rate (pre-FEC BER, post-FEC BER), error
corrected bits (EC-BITS), and so on. Forward error correction (FEC) is configured using optical controllers and monitored
using coherent DSP controllers.
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules support traffic configuration and firmware download. The Cisco IOS XR
software collects performance monitoring data and alarms using versatile DOM (VDM).
Due to more power consumption by the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules, the Cisco IOS XR software operates
the fans at an higher speed to cool these optical modules.
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical module configuration is divided into the following categories:
Traffic configuration – Comprises configuring DAC rate, muxponder mode, modulation, and FEC parameters. Applicable for optics
controllers:
Performance monitoring (PM) – Enables or disables performance monitoring in optical modules. You can also configure PM parameters
that comprise signal power, chromatic dispersion, optical signal-to-noise ratio (OSNR), and differential group delay (DGD).
Applicable for optics controllers and coherent DSP controllers:
Alarms threshold configuration – Configures thresholds for monitoring alarms that include optical signal-to-noise ratio (OSNR),
differential group delay (DGD), chromatic dispersion (cd high and low), and so on. Applicable for optics controllers:
The following table contains the possible traffic configuration values for the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules,
in the transponder and muxponder mode:
Table 2. QDD-400G-ZR-S and QDD-400G-ZRP-S Traffic Configuration Values
QDD-400G-ZR-S
QDD-400G-ZRP-S
Client Speed
1x400, 4x100
1x400, 4x100, 3x100, 2x100, 1x100
Trunk Speed
400G
400G, 300G, 200G, 100G
Frequency
C-Band, 196.1 To 191.3 THz
C-Band, 196.1 To 191.3 THz
FEC
cFEC
oFEC, cFEC
Modulation
16QAM
16QAM, 8QAM, QPSK
DAC-Rate
1x1
1x1.25, 1x1
Chromatic Dispersion (CD)
-2400 to +2400
-160000 to +160000
Transmitted (Tx) Power
Each optical module has its own transmitting (TX) power range. You can change the transmitting (TX) power value based on the
module capability.
Each optical module has its own transmitting (TX) power optimal values. You can change the transmitting (TX) power value based
on the module capability.
FPD Upgrades Enabled for QDD-400G-ZR-S and QDD-400G-ZRP-S Optical Modules
This feature allows you to perform Field Programmable Device (FPD) upgrades on the QDD-400G-ZR-S and QDD-400G-ZRP-S optical
modules to ensure they have the latest fixes and features. For more information about the optic module portfolio, see the
Cisco 400G Digital Coherent Optics QSFP-DD Optical Modules Data Sheet.
Although an FPD upgrade is not mandatory in this release, we recommend upgrading the FPD to the latest version in the subsequent
releases to ensure that all the latest fixes and features are enabled on the optical modules.
See the “Upgrading Field-Programmable Device” chapter in the System Management Configuration Guide for Cisco NCS 5500 Series Routers for details on the procedure to upgrade the FPD.
After an FPD upgrade, you must disable and re-enable the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules using the controller optics command for the latest firmware to be activated.
QDD-400G-ZR-S Transponder and Muxponder Configuration Values
The following table contains the possible Transponder and Muxponder configuration values for the QDD-400G-ZR-S optical module:
Table 4. QDD-400G-ZR-S Transponder and Muxponder Configuration Values
TXP/MXP
Client
Trunk
Modulation
FEC
DAC Rate
400G-TXP
1 client, 400G speed
1 trunk, 400G
16 QAM
cFEC
1x1
4x100G- MXP
4 clients, 100G speed
1 trunk, 400G
16 QAM
cFEC
1x1
QDD-400G-ZRP-S Transponder and Muxponder Configuration Values
The following table contains the possible Transponder and Muxponder configuration values for the QDD-400G-ZRP-S optical module:
Table 5. QDD-400G-ZRP-S Transponder and Muxponder Configuration Values
TXP/MXP
Client
Trunk
Modulation
FEC
DAC Rate
400G-TXP
1 Client, 400G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
400G-TXP
1 Client, 400G speed
1 trunk, 400G speed
16 QAM
cFEC
1x1
4x100G- MXP
4 clients, 100G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
4x100G- MXP
4 clients, 100G speed
1 trunk, 400G speed
16 QAM
cFEC
1x1
3x100G-MXP
3 clients, 100G speed
1 trunk, 400G speed
8 QAM
oFEC
1x1.25
2x100G-MXP
2 clients, 100G speed
1 trunk, 200G speed
QPSK
oFEC
1x1.25
1x100G-MXP
1 client, 100G speed
1 trunk, 100G speed
QPSK
oFEC
1x1.25
Configuring Frequency
You can configure frequency on optics controllers. You can select any C band frequency between the range 196.1 to 191.3 THz,
in both ITU and NON-ITU channels.
Note
The 100MHz-grid keyword accepts only frequency values as user input. The 50GHz-grid keyword accepts frequency, ITU-channel,
or wavelength values as user input. The Cisco IOS XR software then caculates the frequency for a given wavelength or ITU-channel.
Frequency Configuration Example
The following example shows how to configure frequency on the optics controller:
Router#show run controller optics 0/2/0/16
Fri May 28 01:42:32.488 UTC
controller Optics0/2/0/16
dwdm-carrier 100MHz-grid frequency 1921500
cd-low-threshold -5000
cd-high-threshold -5000
!
Verification
This example shows how to verify the frequency configuration:
Router#show controller optics 0/2/0/16
Fri May 28 01:47:23.953 UTC
Controller State: Up
Transport Admin State: In Service
Laser State: Off
LED State: Off
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZRP
DWDM carrier Info: C BAND, MSA ITU Channel=80, Frequency=192.15THz,
Wavelength=1560.200nm
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 = 0
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 mA
Actual TX Power = -40.00 dBm
RX Power = -40.00 dBm
RX Signal Power = -40.00 dBm
Frequency Offset = 0 MHz
Laser Temperature = 0.00 Celsius
Laser Age = 0 %
DAC Rate = 1x1.25
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 13.0 -24.0 10.0 -22.0
Tx Power Threshold(dBm) 0.0 -16.0 -2.0 -14.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 0.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -10.00 dBm
Configured CD High Threshold = -5000 ps/nm
Configured CD lower Threshold = -5000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 60.1385459900 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -26000 ps/nm CD-MAX 26000 ps/nm
Second Order Polarization Mode Dispersion = 0.00 ps^2
Optical Signal to Noise Ratio = 0.00 dB
Polarization Dependent Loss = 0.00 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 0.00 ps
Temperature = 21.00 Celsius
Voltage = 3.42 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZRP
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E30-19E
Rev Number : 10
Serial Number : ACA244900GN
PID : QDD-400G-ZRP-S
VID : ES03
Firmware Version : 161.06
Date Code(yy/mm/dd) : 20/12/08
!
Configuring Chromatic Dispersion
You can configure chromatic dispersion on optics controllers. When you configure the maximum and minimum values for chromatic
dispersion for any data rate, ensure that the minimum difference between the configured values is equal to or greater than
1000 ps/nm.
The following table lists the default CD search range:
Table 6. Default CD Search Range
Muxponder Rate
FEC Value
Default CD Search Range (Min-Max)
400
OFEC
-26000 to +26000
400
CFEC
-2400 to +2400
300
OFEC
-50000 to +50000
200
OFEC
-50000 to +50000
100
OFEC
-80000 to +80000
Note
For cd-max and cd-min range details, see the controller optics command.
Chromatic Dispersion Configuration Example
This example shows how to configure chromatic dispersion on the optics controller:
This example shows the running configuration for the optics controller:
Router#show run controller optics 0/0/0/13
Thu May 13 12:24:42.353 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
!
Verification
This example shows how to verify the configured chromatic dispersion values for the optics controller:
Router#show controller optics 0/0/0/13
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 = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 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 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 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 = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 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 : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring Optical Transmit Power
You can set the transmit power of the optical signal.
Each QDD-400G-ZR-S and QDD-400G-ZRP optical module has its own optical transmit (TX) power range. User can change the optical
transmit (TX) power value based on the module capability. For "Transmitter specifications", see the Cisco 400G Digital Coherent Optics QSFP-DD Optical Modules Data Sheet.
Table 7. Optical Transmit Power Values
Optical Module
Trunk Speed
Optical Transmit Power (Tx) Shaping
Interval
Supported Range of Optical Transmit Power (Tx) Values (in units of 0.1dBm)1
Minimum Value
Maximum Typical Value
Maximum Worst CaseValue
QDD-400G-ZR-S
400G
No
1
-150
-100
-100
QDD-400G-ZRP-S
400G
Yes
1
-150
-110
-130
QDD-400G-ZRP-S
300G
Yes
1
-150
-104
-119
QDD-400G-ZRP-S
200G
Yes
1
-150
-90
-105
QDD-400G-ZRP-S
100G
Yes
1
-150
-59
-75
1. The default optical transmit power (Tx) value is -10 dBm, however with TX shaping enabled the maximum power in 1x400G,
4x100G, 3x100G, 2x100G, and 1x100G modes may be less than -10 dBm.
Transmitting Power Configuration Example
The following example shows how to configure the optical transmit (TX) power on the optics controller:
Using the no breakoutmuxponder mode command, you can switch from the muxponder mode to the transponder mode, on optics controllers.
Muxponder Mode Configuration Example
The following example shows how to configure muxponder mode on the optics controller:
Router#config
Router(config)#controller optics 0/0/0/13
Router(config-Optics)#breakout 4x100
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit
Note
In the above example, the Cisco IOS XR software creates four Ethernet clients with 100GE speed, which can be verified using
the show interfaces brief | include R/S/I/P command.
Running Configuration
This example shows the running configuration for the optics controller:
Router#show run controller optics 0/0/0/13
Thu May 13 12:24:42.353 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
breakout 4x100
!
Verification
This example shows how to verify the muxponder mode configuration:
Router#show interfaces brief | include 0/0/0/13Hu0/0/0/13/0 up up ARPA 1514 100000000
Hu0/0/0/13/1 up up ARPA 1514 100000000
Hu0/0/0/13/2 up up ARPA 1514 100000000
Hu0/0/0/13/3 up up ARPA 1514 100000000
Transponder Mode Configuration Example
The following example shows how to switch to the transponder mode, on the optics controller:
Router#config
Router(config)#controller optics 0/0/0/13
Router(config-Optics)#no breakout 4x100
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit
Note
The Cisco IOS XR software creates a single 400GE interface, which can be verified using the show interfaces brief | includeR/S/I/P command.
Running Configuration
This example shows the running configuration for the optics controller. The breakout configuration is absent in the running
configuration.
Router#show run controller optics 0/0/0/13
Thu May 13 13:51:20.330 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
transmit-power -100
!
Verification
This example shows how to verify the transponder mode configuration:
Router#show interfaces brief | include 0/0/0/13
FH0/0/0/13 up up ARPA 1514 400000000
Configuring Modulation
You can configure modulation on optics controllers. Based on the muxponder mode, you can choose the modulation.
Note
The system accepts any modulation value that is entered. However, if the modulation value is outside the supported range,
it is not configured on the optical module. Instead, the optical module is auto-configured with a valid modulation value.
To view this value, use the show controller opticsR/S/I/P command.
See the following tables for the supported modulation values:
Use the show controller opticsR/S/I/P command to verify the modulation value of the optical module.
Verification
This example shows how to verify the configured modulation value for the optics controller:
Router#show controller optics 0/0/0/1
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 = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 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 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 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 = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 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 : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring DAC Rate
You can set the DAC (digital to analog conversion) sampling rate on optics controllers. You can modify the DAC sampling rate
only on the QDD-400G-ZRP-S optical module.
Note
QDD-400G-ZR-S supports 1x1 dac-rate in cFEC mode. QDD-400G-ZRP-S supports 1x1 dac-rate in cFEC mode and 1x1.25 dac-rate in
oFEC mode.
DAC Rate Configuration Example
The following example shows how to set the DAC rate on the optics controller:
Router#show run controller optics 0/0/0/1
Thu May 13 12:52:35.020 UTC
controller Optics0/0/0/1
cd-min -4000
cd-max 4000
transmit-power -100
modulation 16Qam
DAC-Rate 1x1
!
!
Verification
This example shows how to verify the configured DAC rate for the optics controller:
Router#show controller optics 0/0/0/1
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 = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 MHz
DAC Rate = 1x1
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 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 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 = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 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 : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring FEC
You can configure forward error correction (FEC) only on optics controllers. You can modify FEC only on the QDD-400G-ZRP-S
optical module. FEC is a feature that is used for controlling errors during data transmission. This feature works by adding
data redundancy to the transmitted message using an algorithm. This redundancy allows the receiver to detect and correct a
limited number of errors occurring anywhere in the message, instead of having to ask the transmitter to resend the message.
Note
QDD-400G-ZR-S supports cFEC (concatenated forward error correction) and QDD-400G-ZRP-S supports cFEC and oFEC (open forward
error correction).
FEC Configuration Example
The following sample shows how to configure FEC on the optics controller:
This example shows the running configuration on coherent DSP controllers:
Router#show run controller coherentdsp 0/0/0/4
Thu May 13 19:51:08.175 UTC
controller CoherentDSP0/0/0/4
secondary-admin-state maintenance
loopback internal
!
Verification
This example shows how to verify the loopback configuration on coherent DSP controllers:
Router#show controller coherentdsp 0/0/0/4
Thu May 27 17:28:51.960 UTC
Port : CoherentDSP 0/0/0/4
Controller State : Down
Inherited Secondary State : Normal
Configured Secondary State : Maintenance
Derived State : Maintenance
Loopback mode : Internal
BER Thresholds : SF = 1.0E-5 SD = 1.0E-7
Performance Monitoring : Enable
Bandwidth : 400.0Gb/s
Alarm Information:
LOS = 6 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 = 5
Detected Alarms : LOS
Bit Error Rate Information
PREFEC BER : 5.0E-01
POSTFEC BER : 0.0E+00
Q-Factor : 0.00 dB
Q-Margin : -7.20dB
OTU TTI Received
FEC mode : C_FEC
Configuring Performance Monitoring
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.
Performance monitoring can be configured on optics controllers and coherent DSP controllers.
To stop performance monitoring on optics or coherent DSP controllers, use the perf-mon disable keyword.
Configuring PM Parameters
The performance monitorning (PM) threshold and the threshold crossing alert (TCA) reporting status can be configured for optics
controllers and coherent DSP controllers:
Table 9. PM Thresholds and TCA Report Status for Optics Controllers
PM Parameters
Description
CD
Sets the CD (chromatic dispersion) threshold or TCA reporting status.
DGD
Sets the DGD (differential group delay) threshold or TCA reporting status.
LBC
Sets the LBC (laser bias current) threshold or TCA reporting status in mA.
FREQ-OFF
Sets the FREQ-OFF (low signal frequency offset) threshold or TCA reporting status in Mhz.
OPR
Sets the OPR (optical power RX) threshold or TCA reporting status in uW or dbm.
OPT
Sets the OPT (optical power TX) threshold or TCA reporting status in uW or dbm.
OSNR
Sets the OSNR (optical signal-to-noise ratio) threshold or TCA reporting status.
PCR
Sets the PCR (polarization change rate) threshold or TCA reporting status.
PDL
Sets the PDL (polarization dependent loss) threshold or TCA reporting status.
RX-SIG
Sets the RX-SIG (receiving signal power) threshold or TCA reporting status in uW or dbm.
SNR
Sets the SNR (signal-to-noise ratio) threshold or TCA reporting status.
SOPMD
Sets the SOPMD (second order polarization mode dispersion) threshold or TCA reporting status.
Table 10. PM Thresholds TCA Report Status for Coherent DSP Controllers
PM Parameters
Description
Q
Sets the Q threshold or TCA reporting status.
Q-margin
Sets the Q margin threshold or TCA reporting status.
EC-BITS
Sets the EC-BITS (error corrected bits) threshold or TCA reporting status.
PostFEC BER
Sets the post-FEC BER threshold or TCA reporting status.
PreFEC BER
Sets the pre-FEC BER threshold or TCA reporting status.
UC-WORDS
Sets the UC-WORDS (uncorrected words) threshold or TCA reporting status.
Performance Monitoring Configuration Example
This example shows how to enable performance monitoring and set PM thresholds on the optics controller:
Router#config
Router(config)#controller optics 0/2/0/16
Router(config-Optics)#perf-mon enable
Router(config-Optics)#pm 30-sec optics threshold cd max 100
Router(config-Optics)#pm 30-sec optics threshold cd min -100
Router(config-Optics)#commit
Running Configuration
This example shows the running configuration on optics controllers:
Router#show run controller optics 0/2/0/16
Thu May 13 20:18:55.957 UTC
controller Optics0/2/0/16
pm 30-sec optics threshold cd max 100
pm 30-sec optics threshold cd min -100
perf-mon enable
!
Verification
This example shows how to verify the PM parameters on optics controllers. Verify the configuration changes in the Configured
Threshold fields:
Router#show controller optics 0/2/0/16 pm current 30-sec optics 1
Thu May 27 17:58:49.889 UTC
Optics in the current interval [17:58:30 - 17:58:49 Thu May 27 2021]
Optics current bucket type : Valid
MIN AVG MAX Operational Configured TCA Operational Configured TCA
Threshold(min) Threshold(min) (min) Threshold(max) Threshold(max) (max)
LBC[mA ] : 0.0 0.0 0.0 0.0 NA NO 100.0 NA NO
OPT[dBm] : -9.98 -9.98 -9.98 -15.09 NA NO 0.00 NA NO
OPR[dBm] : -40.00 -40.00 -40.00 -30.00 NA NO 8.00 NA NO
CD[ps/nm] : 0 0 0 -80000 -100 NO 100 100 NO
DGD[ps ] : 0.00 0.00 0.00 0.00 NA NO 80.00 NA NO
SOPMD[ps^2] : 0.00 0.00 0.00 0.00 NA NO 2000.00 NA NO
OSNR[dB] : 0.00 0.00 0.00 0.00 NA NO 40.00 NA NO
PDL[dB] : 0.00 0.00 0.00 0.00 NA NO 7.00 NA NO
PCR[rad/s] : 0.00 0.00 0.00 0.00 NA NO 2500000.00 NA NO
RX_SIG[dBm] : -40.00 -40.00 -40.00 -30.00 NA NO 1.00 NA NO
FREQ_OFF[Mhz]: 0 0 0 -3600 NA NO 3600 NA NO
SNR[dB] : 0.00 0.00 0.00 7.00 NA NO 100.00 NA NO
Last clearing of "show controllers OPTICS" counters never
!
Performance Monitoring Configuration Example
This example shows how to enable performance monitoring and set PM thresholds and TCA reporting status on the coherent DSP
controller:
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