Configuring 400G Digital Coherent Optics

Table 1. Feature History Table

Feature Name

Release Information

Description

Extended Support for DP04QSDD-HE0 Optical Module

 Release 7.10.2 From this release, the DP04QSDD-HE0 optical module is supported on the following router and line cards -

Router:

  • Cisco 8202-32FH-M

Line cards:

  • 88-LC0-34H14FH

  • 88-LC0-36FH

Extended Support for DP04QSDD-HE0 Optical Module

 Release 7.10.1

This release introduces support for the Cisco 400G QSFP-DD High-Power (Bright) Optical Module DP04QSDD-HE0, Ethernet Variant on the Cisco 8608 router.

oFEC Traffic Configuration for QDD-400G-ZRP-S

Release 7.9.1

New Modulation and DAC Rate traffic configurations are supported on QDD-400G-ZRP-S optical module:

  • 400G-TXP-1x1-16 QAM

  • 4x100G-MXP-1x1-16 QAM

  • 3x100G-MXP-1x1-8 QAM

  • 2x100G-MXP-1x1-QPSK

  • 2x100G-MXP-1x1.25-16 QAM

This increases the interoperability of the QDD-400G-ZRP-S optical module across network components supporting these formats.

Support for DP04QSDD-HE0 Optical Module

Release 7.9.1

The Cisco 400G QSFP-DD High-Power (Bright) Optical Module is an enhanced version of the currently available QSFP-DD ZR+ Optical Module. It leverages the same operational modes but provides a major enhancement by increasing the Tx Optical Power up to +1dBm.

From this release, the DP04QSDD-HE0 optical module is supported on the Cisco 8201-32FH and Cisco 8201-24H8FH routers.

Support for QDD-400G-ZRP-S Optical Module

Release 7.9.1

This release introduces support for the Cisco 400G QSFP-DD-ZRP-S Ethernet Variant on the Cisco 88-LC0-34H14FH line card.

Cisco offers a range of the new 400G Digital Coherent QSFP-DD optical modules. The optical modules that are available are:

  • QDD-400G-ZR-S

  • QDD-400G-ZRP-S

  • DP04QSDD-HE0

This chapter describes various optical modules and their supported configurations. The following fixed-port routers, line cards, from the indicated Cisco IOS XR software releases, support these optical modules.

Table 2. Fixed-Port Routers and Line Cards that Support various Optical Modules from Indicated Cisco IOS XR Software Releases

Fixed-Port Routers

Optics PID

Minimum IOS XR Software Release

Cisco 8201

QDD-400G-ZR-S

Release 7.3.15

QDD-400G-ZRP-S

Cisco 8202

QDD-400G-ZR-S

Release 7.3.15

QDD-400G-ZRP-S

Cisco 8101-32FH

QDD-400G-ZR-S

QDD-400G-ZRP-S

Release 7.3.2

Cisco 8201-32FH

DP04QSDD-HE0

Release 7.9.1

Cisco 8201-24H8FH

DP04QSDD-HE0

Release 7.9.1

Cisco 8608

DP04QSDD-HE0

 Release 7.10.1

Cisco 8202-32-FH-M

DP04QSDD-HE0

 Release 7.10.2

Line Cards

Optics PID

Minimum IOS XR Software Release

8800-LC-36FH

QDD-400G-ZR-S

Release 7.3.15

QDD-400G-ZRP-S

88-LC0-36FH-M

QDD-400G-ZR-S

Release 7.3.15

QDD-400G-ZRP-S

88-LC0-36FH

QDD-400G-ZR-S

Release 7.3.2

QDD-400G-ZRP-S

DP04QSDD-HE0

 Release 7.10.2

88-LC0-34H14FH

QDD-400G-ZRP-S

Release 7.9.1

DP04QSDD-HE0

 Release 7.10.2

Note

QDD-400G-ZR-S and QDD-400G-ZRP-S are not supported on 8102-64H fixed-port routers.

QDD-400G-ZRP-S and DP04QSDD-HE0 are not supported on odd-numbered ports of the following routers and line cards:

  • Cisco 8201

  • Cisco 8202

  • 8800-LC-36FH

  • 88-LC0-36FH-M

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:

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 3. 400G Digital Coherent QSFP-DD Traffic Configuration Values

QDD-400G-ZR-S

QDD-400G-ZRP-S

DP04QSDD-HE0

DP04QSDD-ER1

DP01QSDD-ZF1

Client Speed

1x400G, 4x100G

1x400G, 4x100G, 3x100G, 2x100G, 1x100G

Note

 

Release 7.3.15 supports only 1x400 and 4x100 client speed.

1x400G, 4x100G, 3x100G, 2x100G, 1x100G

1x400G, 2x200G, 4x100G

1x100G

Trunk Speed

400G

400G

, 300G, 200G, 1x100

Note

 

Release 7.3.15 supports only 400G trunk speed.

400G, 300G, 200G, 100G

400G

100G

Frequency

C-Band, 196.1 To 191.3 THz

C-Band, 196.1 To 191.3 THz

C-Band, 196.1 To 191.3 THz

193.7THz

193.7THz

FEC

cFEC

oFEC, cFEC

oFEC

cFEC, oFEC

oFEC

Modulation

16QAM

16QAM, 8QAM, QPSK

Release 7.3.15 supports only 16QAM.

16QAM, 8QAM, QPSK

16QAM

QPSK

DAC-Rate

1x1

1x1.25 (oFEC), 1x1 (cFEC)

1x1.25, 1x1

1x1

1x1

Chromatic Dispersion (CD)

-2400 to +2400

Release 7.3.15: -80000 to +80000

Release 7.3.2: -160000 to +160000

-160000 to +160000

-2400 to +2400

-2400 to +2400

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.

Each optical module has its own transmitting (TX) power optimal values. You can change the transmitting (TX) power value based on the module capability.

Fixed at maximum output around -9dBm.

Fixed at maximum output around -6dBm.

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

OpenZR+ Support

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 oFEC 1x1

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 Client, 100G speed 1 trunk, 400G speed 16 QAM oFEC 1x1

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
3x100G-MXP 3 Client, 100G speed 1 trunk, 400G speed 8 QAM oFEC 1x1

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

QPSK

oFEC

1x1.50
2x100G-MXP 2 Client, 100G speed 1 trunk, 400G speed QPSK oFEC 1x1
2x100G-MXP 2 Client, 100G speed 1 trunk, 400G speed 16 QAM oFEC 1x1.25

1x100G-MXP

1 client, 100G

speed

 1 trunk, 100G speed

QPSK

 oFEC

1x1.50

The high optical performance DP04QSDD-HE0 QSFP-DD pluggable coherent optical module is developed for easy deployment in Reconfigurable Optical Add/Drop Multiplexer (ROADM) line systems.

DP04QSDD-HE0 Transponder and Muxponder Configuration Values

The following table contains the possible Transponder and Muxponder configuration values for the DP04QSDD-HE0 optical module:

Table 6. DP04QSDD-HE0 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
100G-TXP 1 Client, 100G speed 1 trunk, 400G speed QPSK oFEC 1x1.50

4x100G- MXP

4 clients, 100G speed

1 trunk, 400G speed

16 QAM

oFEC

1x1.25

3x100G-MXP

3 clients, 100G speed

1 trunk, 400G speed

8 QAM

oFEC

1x1.25
2x100-MXP 2 Client, 100G speed 2 Client, 100G speed QPSK oFEC

1x1.50

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#config
Router(config)#controller optics 0/2/0/16
Router(config-Optics)#dwdm-carrier 100MHz-grid frequency 1921500
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit

Running Configuration

This example shows the running configuration: 

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 7. 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

Chromatic Dispersion Configuration Example

This example shows how to configure chromatic dispersion on the optics controller: 

Router#configure
Router(config)#controller optics 0/0/0/13
Router(config-Optics)#cd-max 4000
Router(config-Optics)#cd-min -4000
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit

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
 !

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-S optical module has its own optical transmit (TX) power range. You 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 8. Optical Transmit Power Values

Optical Module

Trunk Speed1,3

Optical Transmit Power (Tx) Shaping

Interval

Supported Range of Optical Transmit Power (Tx) Values (in units of 0.1dBm)2

Minimum Value

Maximum Value - Typical

Maximum Value - Worst Case

QDD-400G-ZR-S

400G

No

1

-150

-100

-100

QDD-400G-ZRP-S

400G

Yes

1

-150

-110

-130

300G

-150

-104

-119

200G

-150

-90

-105

100G

-150

-59

-75

DP04QSDD-HE0

400G

Yes

1

-100

20

10

300G

200G

100G

1. Release 7.3.15 supports 4x100G muxponder mode or trunk speed.

2. 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.

3. Release 7.3.2 and future releases support 3x100G, 2x100G, and 1x100G muxponder modes or trunk speed.

Transmitting Power Configuration Example

The following example shows how to configure the optical transmit (TX) power on the optics controller:
Router#config
Router(config)#controller optics 0/2/0/16
Router(config-Optics)#transmit-power -125
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit

Running Configuration

This example shows the running configuration for the optics controller:

Router#show run controller optics 0/2/0/16
Thu May 13 12:52:35.020 UTC
controller Optics0/0/0/1
 cd-min -4000
 cd-max 4000
 transmit-power -125
!

Verification

This example shows how to verify the configured optical transmit power for the optics controller: 

Router#show controller optics 0/2/0/16
Fri May 28 02:52:06.182 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 = -12.50 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 -4000 ps/nm  CD-MAX 4000 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 = 20.00 Celsius
         Voltage = 3.41 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 Muxponder Mode

By default, the Cisco IOS XR software configures the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules in the 400G transponder mode.

Using the breakout muxponder mode command, you can configure muxponder mode on optics controllers. Based on the muxponder mode, you can choose the modulation.

Muxponder mode options available for QDD-400G-ZR-S are:

  • 4x100

Muxponder mode options available for QDD-400G-ZRP-S are:

  • 4x100

  • 3x100

  • 2x100


Note

Release 7.3.15 supports only 4x100 muxponder mode.

See the following tables for the modulation values, based on the muxponder mode:

Using the no breakout muxponder 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 0/0/0/13
 Hu0/0/0/13/0          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 | include R/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 optics R/S/I/P command.

See the following tables for the supported modulation values:

Modulation Configuration Example

The following example shows how to configure modulation on the optics controller:
Router#config
Router(config)#controller optics 0/0/0/1
Router(config-Optics)#modulation 16Qam
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit

Running Configuration

This example shows the running configuration: 

Router#show run controller optics 0/0/0/1
controller Optics0/0/0/1
 cd-min -4000
 cd-max 4000
 transmit-power -100
 modulation 16Qam
!

Note

Use the show controller optics R/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 and DP04QSDD-HE optical module.


Note

QDD-400G-ZR-S supports 1x1 dac-rate in cFEC mode. QDD-400G-ZRP-S and DP04QSDD-HE 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#config
Router(config)#controller optics 0/0/0/1
Router(config-Optics)#dac-rate 1x1

Verification

This example shows the running configuration: 

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 and DP04QSDD-HE 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). QDD-400G-ZRP-S and DP04QSDD-HE supports cFEC and oFEC (open forward error correction).

FEC Configuration Example

The following sample shows how to configure FEC on the optics controller:
Router#configure
Router(config)#controller optics 0/0/0/13
Router(config-Optics)#fec CFEC
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit

Running Configuration

This example shows the running configuration: 

Router#show controllers optics 0/0/0/13
controller Optics0/0/0/1
 cd-min -4000
 cd-max 4000
 transmit-power -100
 fec CFEC
 modulation 16Qam
 DAC-Rate 1x1.25
!

Verification

This example shows how to verify the FEC configuration for the optics controller: 

Router#show controller coherentdsp 0/0/0/13
Thu May 27 17:28:51.960 UTC
Port                                            : CoherentDSP 0/0/0/13
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 Loopback

You can configure media loopback and host loopback on optics controllers. Loopback can be performed only in the maintenance mode.


Note
Line loopback mode is supported only on Cisco 8000 series line cards and fixed-port routers based on Q100 and Q200 silicon.

Loopback Configuration Example

This example shows how to enable loopback configuration on optics controllers.

Use show controllers optics R/S/I/P information loopback command to check the supported loopback types. 

Router#show controllers optics 0/0/0/4 information loopback
Supported Loopback Types :
============================
 [1.] Media Line
 [2.] Host Internal

 Unsupported Loopback Types :
=============================

 [1.] Media Internal
 [2.] Host Line
 [3.] Host Per Lane 
 [4.] Media Per Lane
 [5.] Simultaneous Media Host
 Media Configured Loopback : Media Loopback None 
 Media Applied Loopback    : Media Loopback None 

 Host Configured Loopback : Host Loopback None 
 Host Applied Loopback    : Host Loopback None

Use loopback and host loopback commands in config-optics sub mode to configure the media and host loopback modes respectively. Loopback mode for both media and host can be configured to either internal or line, depending on the supported loopback types. 

Router#config
Router(config)#controller optics 0/0/0/4
Router(config-Optics)#sec-admin-state maintenance
Router(config-Optics)#loopback line /* configures the media loopback to line */
Router(config-Optics)#host loopback internal /* configures the host loopback to internal */
Router(config-Optics)#commit

Running Configuration

This example shows the running configuration on optics controllers. 

Router#show run controller optics 0/0/0/4
Thu May 13 19:51:08.175 UTC
controller Optics0/0/0/4 
 loopback line
 host loopback internal
 sec-admin-state maintenance
!

Verification

This example shows how to verify the loopback configuration on optics controllers. 

Router#show controllers optics 0/0/0/4 
Controller State: Up
Transport Admin State: In Service
Laser State: On
Host Squelch Status: Enable    
Media linkdown preFEC degrade : Disabled
LED State: Yellow
FEC State: FEC ENABLED
Power Mode: High
Dom Data Status: Ready
Last link flapped: 00:02:32
Optics Status
     Optics Type:  QSFPDD 400G ZR
     DWDM carrier Info: C BAND, MSA ITU Channel=1, Frequency=196.10THz,
     Wavelength=1528.773nm
     Loopback Host : Internal
     Loopback Media : Line
 
     Alarm Status:
     -------------
     Detected Alarms: None
 
     LOS/LOL/Fault Status:
 ...

Router#show controllers optics 0/0/0/4 information loopback
Supported Loopback Types :
============================
 [1.] Media Line
 [2.] Host Internal

 Unsupported Loopback Types :
=============================

 [1.] Media Internal
 [2.] Host Line
 [3.] Host Per Lane 
 [4.] Media Per Lane
 [5.] Simultaneous Media Host
 Media Configured Loopback : Media Loopback Line 
 Media Applied Loopback    : Media Loopback Line 

 Host Configured Loopback : Host Loopback Internal 
 Host Applied Loopback    : Host Loopback Internal

Disable Auto-Squelching

Table 9. Feature History Table

Feature Name

Release Information

Description

Disable Auto-Squelching

Release 7.11.1

This release introduces support to disable Auto squelching. This helps to detect weak signals that are hidden within the laser source noise. By disabling Auto squelch, you can reduce the processing overhead in systems that have stable laser sources and minimal noise, helping you optimize the performance of your system. When the Auto squelch function is enabled, the optical module will generate a local fault signal on the host side if it detects a fault on the media side. By default, Auto squelch is enabled.

The feature introduces these changes:

CLI:The following keyword has been added.

YANG DATA models:

This release introduces the support to disable auto-squelch functionality on the module on the host side. When enabled, the squelch function is activated on the module when no suitable media-side input signal from the remote end is available to be forwarded to the host-side output (example: Rx LOS is asserted). Auto squelching is commonly used to suppress unwanted noise from laser sources in communication systems. When disabled and no valid signal is detected on the module from the remote end, the module will generate a local fault towards the NPU. However, disabling auto-squelching provides you with expanded signal detection. This enables you to detect extremely weak signals that are embedded within the laser source noise. Also, by eliminating the need to continuously monitor and suppress unwanted noise, system resources can be allocated more efficiently, leading to improved performance.

In this feature, we introduced the host auto-squelch disable command to disable the auto-squelch functionality when there is an invalid input signal from the remote end. This feature provides you with the flexibility to customize the system's behavior according to your requirements.

Disabling Laser Squelching Configuration Example

This example shows how to disable laser squelching for a host on controller optics: 


router#config
router(config)#controller 0/0/0/0
router(config-Optics)#host auto-squelch disable
router(config-Optics)#commit

Verification

This example shows how to verify the laser squelching disabled configuration: 

router#show controllers optics 0/0/0/0 
    Host Squelch Status: disable

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 10. 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 11. 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.

Host-Intf-0-FEC-BER

Sets the Host-Intf-0-FEC-BER threshold or TCA reporting status, where:

  • AVG - specifies the number of corrected bits received from the host interface prior to a PM interval.

  • MIN - specifies the minimum number of corrected bits received from the host interface over a sub-interval and prior to a PM interval.

  • MAX - specifies the maximum number of corrected bits received from the host interface over a sub-interval and prior to a PM interval.

Host-Intf-0-FEC-FERC

Sets the Host-Intf-0-FEC-FERC threshold or TCA reporting status, where:

  • AVG - specifies the number of frames received from the host interface during a sub-interval.

  • MIN - specifies the minimum number of frames received from the host interface with uncorrected errors over a sub-interval and prior to a PM interval.

  • MAX - specifies the maximum number of frames received from the host interface with uncorrected errors over a sub-interval and prior to a PM interval.

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: 

Router#config
Router(config)#controller CoherentDSP0/2/0/16
Router(config-CoDSP)#perf-mon enable
Router(config-CoDSP)#pm 30-sec fec report Q max-tca enable
Router(config-CoDSP)#pm 30-sec fec report Q-margin max-tca enable
Router(config-CoDSP)#pm 30-sec fec report Q min-tca enable
Router(config-CoDSP)#pm 30-sec fec report Q-margin min-tca enable
Router(config-CoDSP)#pm 30-sec fec threshold Q max 1200
Router(config-CoDSP)#pm 30-sec fec threshold Q-margin max 500
Router(config-CoDSP)#pm 30-sec fec threshold Q min 900
Router(config-CoDSP)#pm 30-sec fec threshold Q-margin min 280
Router(config-CoDSP)#commit

Running Configuration

This example shows the running configuration on coherent DSP controllers: 

Router#show run controller coherentdsp 0/2/0/16
Thu May 13 19:56:09.136 UTC
controller CoherentDSP0/2/0/16
 pm 30-sec fec report Q max-tca enable
 pm 30-sec fec report Q-margin max-tca enable
 pm 30-sec fec report Q min-tca enable
 pm 30-sec fec report Q-margin min-tca enable
 pm 30-sec fec threshold Q max 1200
 pm 30-sec fec threshold Q-margin max 500
 pm 30-sec fec threshold Q min 900
 pm 30-sec fec threshold Q-margin min 280
 perf-mon enable
 !

Verification

This example shows how to verify the PM parameters on coherent DSP controllers. Verify the configuration changes in the highlighted fields: 

Router#show controllers coherentdsp 0/2/0/16 pm current 30-sec fec
Thu May 27 23:04:54.167 UTC
g709 FEC in the current interval [23:04:30 - 23:04:54 Thu May 27 2021]
FEC current bucket type : Valid
    EC-BITS   : 0                       Threshold : 111484000000           TCA(enable)  : YES
    UC-WORDS  : 0                       Threshold : 5                      TCA(enable)  : YES
                                      MIN       AVG        MAX      Threshold      TCA     Threshold     TCA
                                                                       (min)     (enable)    (max)     (enable)
PreFEC BER                     :     0E-15     0E-15     0E-15      0E-15        NO       0E-15        NO
PostFEC BER                    :     0E-15     0E-15     0E-15      0E-15        NO       0E-15        NO
Q[dB]                          :      0.00      0.00      0.00      9.00  YES 120.00  YES
Q_Margin[dB]                   :      0.00      0.00      0.00      2.80  YES  5.00   YES
 !

Configuring Alarms Threshold

The alarms threshold can be configured for monitoring alarms on optics controllers:

Table 12. Alarms Threshold Parameters for Optics Controllers

Alarm Threshold Parameters

Description

CD

Sets the CD (chromatic dispersion) alarm threshold (cd-low-threshold and cd-high-threshold).

DGD

Sets the DGD (differential group delay) alarm threshold.

LBC

Sets the LBC (laser bias current) threshold in mA.

OSNR

Sets the OSNR (optical signal-to-noise ratio) alarm threshold.

Alarm Threshold Configuration Example

This example shows how to configure alarm threshold on the optics controller: 

Router#config
Router(config)#controller optics 0/2/0/16
Router(config-Optics)#cd-low-threshold -2000
Router(config-Optics)#cd-high-threshold 2000
Router(config-Optics)#commit

Running Configuration

This example shows the running configuration on the optics controller: 

Router#show run controller optics 0/2/0/16
Thu May 13 20:18:55.957 UTC
controller Optics0/2/0/16
 cd-low-threshold 2000
 cd-high-threshold 2000
!

Verification

This example shows how to verify the alarm threshold on optics controllers: 

Router#show controller optics 0/2/0/16
Fri May 28 01:04:33.604 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=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 = 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
!