Configuring 400G Digital Coherent Optics

Feature Name

Release Information

Description

Support for DP04QSDD-HE0 Optical Module

Release 7.9.1

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

The Cisco 400G QSFP-DD High-Power (Bright) Optical module is an enhanced version of the currently available QSFP-DD ZR+ Optical Module, leveraging the same operational modes but providing as a major enhancement the increase of the Tx Optical Power up to +1dBm.

DP04QSDD-HE0 optical module is supported in the following hardware:

  • A9K-20HG-FLEX-SE/TR/FC​

  • A9K-8HG-FLEX-SE/TR/FC​

Extended Support for DP04QSDD-HE0 Optical Module

Release 7.10.1

With this release, the support for DP04QSDD-HE0 optical module is extended to the following hardware:

  • A99-10X400GE-X-SE/TR​

  • A9903-20HG-PEC​

  • A9903-20HG-PEC-FC​

  • ASR9902 (100G)​

  • ASR9902-FC (100G)​

Support for 3x100G Muxponder Mode on A99-10X400GE-X-SE/A99-10X400GE-X-TR Line Cards

Release 7.9.1

QDD-400G-ZRP-S optical module operating in A99-10X400GE-X-SE/A99-10X400GE-X-TR line cards now supports 3x100G muxponder mode.

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

Release 7.9.1

QDD-400G-ZRP-S optical module can now support the following oFEC traffic configurations:

  • 400G-TXP-1x1 DAC-16 QAM

  • 3x100G-MXP-1x1 DAC-8 QAM

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

Support for 8 and 16 Quadrature Amplitude Modulation (QAM) Formats on QDD-400G-ZRP-S Optical Modules

Release 7.8.1

QDD-400G-ZRP-S optical module operating in 200G interfaces now supports the 8 QAM and 16 QAM modulation formats. This increases the interoperability of the optical module across network components supporting these formats.

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

For more information about the optic module portfolio, see the Cisco 400G Digital Coherent Optics QSFP-DD Optical Modules Data Sheet.

This chapter describes the 400G Digital Coherent QSFP-DD optical modules and their supported configurations.

The following table shows the line cards, ports, and modes that support these two optical modules.

Table 1. Supported Line Cards, Ports, and Modes

Components

Default Port Speed

Supported Front Panel Ports

1x400G Transponder Mode

4x100G Muxponder Mode

3x100G Muxponder Mode

2x100G Muxponder Mode

1x100G Transponder Mode

A9K-20HG-FLEX-SE/A9K-20HG-FLEX-TR

1x100G

0, 7, 8, 12, 19

Yes

Yes

Yes

Yes

Yes

A9K-8HG-FLEX-SE/A9K-8HG-FLEX-TR

1x100G

0, 7

Yes

Yes

Yes

Yes

Yes

A99-10X400GE-X-SE/A99-10X400GE-X-TR

1x400G

3, 5, 6, 7, 9

Yes

Yes

Yes

Yes

Yes

A9903-20HG-PEC

1x100G

0, 4, 8, 12, 16

Yes

Yes

Yes

Yes

Yes

ASR-9902

1x100G

11, 37

No

No

No

No

Yes

The 400G Digital Coherent QSFP-DD 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 400G Digital Coherent QSFP-DD optical modules. Optics controllers are used to configure and monitor optical parameters, such as frequency, chromatic dispersion, transmitted output power, 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 400G Digital Coherent QSFP-DD optical modules support traffic1 configuration and firmware download. The Cisco IOS XR software collects performance monitoring data and alarms.

Due to more power consumption by the 400G Digital Coherent QSFP-DD optical modules, the Cisco IOS XR software operates the fans at an higher speed to cool these optical modules.

Configuring frequency, chromatic dispersion, optical transmit power, digital to analog conversion (DAC) sampling rate, and FEC parameters impacts traffic. Also, configuring modulation is supported. Modulation is dependent on the mode of operation. See Table 4 and #Cisco_Concept.dita_59215d6f-1614-4633-a137-161ebe794673__table_u5x_f13_ppb.

The 400G Digital Coherent QSFP-DD optical module configuration is divided into the following categories:

The following table contains the possible traffic configuration values for the 400G Digital Coherent QSFP-DD optical modules, in the transponder and muxponder mode:

Table 2. 400G Digital Coherent QSFP-DD Traffic Configuration Values

Optical Module

Client Speed

Trunk Speed

Frequency

FEC

Modulation

DAC-Rate

Chromatic Dispersion (CD)

Transmitted (Tx) Power

QDD-400G-ZR-S

1x400, 4x100

400G

C-Band, 196.1 To 191.3 THz

cFEC

16QAM

1x1

-2400 to +2400

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

QDD-400G-ZRP-S

1x400, 4x100, 3x100, 2x100, 1x100

400G, 300G, 200G, 100G

C-Band, 196.1 To 191.3 THz

oFEC, cFEC

16QAM, 8QAM, QPSK

1x1.25, 1x1

-160000 to +160000

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

DP04QSDD-HE0

1x400, 4x100, 3x100, 2x100, 1x100

400G, 300G, 200G, 100G

C-Band, 196.1 To 191.3 THz

oFEC, cFEC

16QAM, 8QAM, QPSK

1x1.25, 1x1.5

-160000 to +160000

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

QDD-400G-ZR-S and QDD-400G-ZRP-S FPD Upgrade

Table 3. Feature History Table

Feature Name

Release Information

Feature Description

FPD Upgrades Enabled for QDD-400G-ZR-S and QDD-400G-ZRP-S Optical Modules

Release 7.3.2

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. Auto and parallel FPD upgrades are not supported. Only a manual FPD upgrade (one optical module at a time) using the upgrade hw-module location node-id fpd fpd-name command is supported.

The fpd-name can be obtained from the FPD description column of the show fpd package or the show hw-module fpd command. The fpd-name in the FPD description column displays QDD_instance_port-number. For example, depending on the instance and the port number, the FPD names for the QDD-400G-ZR-S and QDD-400G-ZRP-S modules will be QDD_0_3, QDD_0_0, and so on.


Note


Only in case of Cisco ASR 9903 routers, the fpd-name in the FPD description column displays QDD_bay_port-number. The bay value for Cisco 9903 routers is always 1. Therefore, depending on the port number, the FPD names for the QDD-400G-ZR-S and QDD-400G-ZRP-S modules will be QDD_1_3, QDD_1_4, and so on.


See the “Upgrading Field-Programmable Devices” chapter in the System Management Configuration Guide for Cisco ASR 9000 Series Routers for details on the procedure to upgrade the FPD.

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

400G-TXP

1 Client, 400G speed

1 trunk, 400G speed

16 QAM

oFEC

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, 300G speed

8 QAM

oFEC

1x1.25

3x100G-MXP

3 clients, 100G speed

1 trunk, 300G speed

8 QAM

oFEC

1x1

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

QPSK

oFEC

1x1.50

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

8 QAM

oFEC

1x1.25

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

16 QAM

oFEC

1x1.25

1x100G-MXP

1 client, 100G speed

1 trunk, 100G speed

QPSK

oFEC

1x1.50

DP04QSDD-HE0 Transponder and Muxponder Configuration Values

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

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

1x1.5

400G-TXP

1 Client, 400G speed

1 trunk, 400G speed

16 QAM

oFEC

1x1.5

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

1x1.5

4x100G-MXP

4 clients, 100G speed

1 trunk, 400G speed

16 QAM

oFEC

1x1.5

3x100G-MXP

3 clients, 100G speed

1 trunk, 300G speed

8 QAM

oFEC

1x1.25

3x100G-MXP

3 clients, 100G speed

1 trunk, 300G speed

8 QAM

oFEC

1x1.5

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

QPSK

oFEC

1x1.5

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

8 QAM

oFEC

1x1.25

2x100G-MXP

2 clients, 100G speed

1 trunk, 200G speed

16 QAM

oFEC

1x1.25

1x100G-MXP

1 client, 100G speed

1 trunk, 100G speed

QPSK

oFEC

1x1.5

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. DP04QSDD-HE0 optical modules support 1x1.5 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 0/19/0/3
Router(config-Optics)#dac-rate 1x1.25

Verification

This example shows the running configuration:

Router#show run controller optics 0/19/0/3
Thu May 13 12:52:35.020 UTC
controller Optics0/19/0/3
 DAC-Rate 1x1.25
!
!

Verification

This example shows how to verify the configured DAC rate for the optics controller:

Router#show controller optics 0/19/0/3
 Controller State: Up 
 Transport Admin State: In Service 
 Laser State: On 
 LED State: Green 
 FEC State: FEC OFEC
 Optics Status 
         Optics Type:  400G QSFP-DD 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:
         Laser Bias Current = 70.9 mA
         Actual TX Power = -7.06 dBm 
         RX Power = -7.88 dBm 
         RX Signal Power = -7.88 dBm 
         Frequency Offset = -220 MHz 
         Laser Temperature = 53.79 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)          1.9      -28.2           0.0        -25.0
         Tx Power Threshold(dBm)          0.0      -18.0          -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 = -7.00 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 = 180.00 ps 
         Baud Rate =  30.0692729950 GBd
         Modulation Type: QPSK 
         Chromatic Dispersion -2 ps/nm 
         Configured CD-MIN -4000 ps/nm  CD-MAX 4000 ps/nm      
         Second Order Polarization Mode Dispersion = 109.00 ps^2 
         Optical Signal to Noise Ratio = 32.30 dB 
         Polarization Dependent Loss = 0.05 dB 
         Polarization Change Rate = 0.00 rad/s 
         Differential Group Delay = 0.00 ps 

         Temperature = 48.00 Celsius 
         Voltage = 3.30 V 

 Transceiver Vendor Details

         Form Factor            : QSFP-DD
         Optics type            : QSFP-DD 400G-ZRP-S 
         Name                   : CISCO-ACACIA
         OUI Number             : 7c.b2.5c
         Part Number            : DP04QSDD-E30-19E
         Rev Number             : 01
         Serial Number          : ACA2503003X
         PID                    : QDD-400G-ZRP-S 
         VID                    : ES03
         Firmware Version       : 61.20 (Build : 13)  
         Date Code(yy/mm/dd)    : 21/01/22

Configuring Breakout

Feature Name

Release Information

Description

Support for 2x100G, 3x100G and 4x100G Breakout Configurations

Release 7.8.1

This release introduces 2x100G, 3x100G and 4x100G breakout configurations on the following line cards:

  • A9903-20HG-PEC (2x100G, 3x100G, and 4x100G)

  • A99-10X400GE-X-SE/TR (3x100G)

  • A9K-20HG-FLEX-SE/TR (2x100G, 3x100G, and 4x100G)

  • A9K-8HG-FLEX-SE/TR (2x100G, 3x100G, and 4x100G)

Using the hw-module location node-id port port-number breakout muxponder-mode command, you can configure breakout on the ports.

For configuring breakout on Cisco ASR 9903 router, use the following command:

hw-module location node-id bay bay-number port port-number breakout muxponder-mode

The value for bay-number is always 1.

For the supported line cards, ports, and modes, see Table 1.

Configuring Breakout on the Line card with Default 100G Port Speed

The ports with default 100G speed can be configured to operate at 400G port speed using the following command:

This example shows how to configure 1x400G transponder mode on a port with default 100G port speed:

  • hw-module location 0/0/CPU0 port 0 breakout 1xFourHundredGigE

To remove the breakout configuration and revert to the default 100G port speed, use the no form of the command.

For example:

  • no hw-module location 0/0/CPU0 port 0 breakout 1xFourHundredGigE


Note


In the A9903-20HG-PEC card, to configure 1x400G transponder mode, use the hw-module location 0/0/CPU0 bay 1 port 0 breakout 1xFourHundredGigE command. To remove the breakout configuration and revert to the default 100G port speed, use the no for the command - no hw-module location 0/0/CPU0 bay 1 port 0 breakout 1xFourHundredGigE.


To configure 4x100G or 2x100G muxponder mode, use the 4x100G or 2x100G breakout on the supported port(s).

For example:

  • hw-module location 0/0/CPU0 port 0 breakout 4xHundredGigE

  • hw-module location 0/0/CPU0 port 7 breakout 2xHundredGigE

  • hw-module location 0/0/CPU0 port 7 breakout 3xHundredGigE

To remove the breakout configuration and revert to the default 100G port speed, use the no form of the command.

For example:

  • no hw-module location 0/0/CPU0 port 0 breakout 4xHundredGigE

  • no hw-module location 0/0/CPU0 port 7 breakout 2xHundredGigE

  • no hw-module location 0/0/CPU0 port 7 breakout 3xHundredGigE

Configuring Breakout on the Line card with Default 400G Port Speed

The ports with default 400G speed can be configured to operate at 100G port speed using the following command:

This example shows how to configure 1x100G transponder mode on a port with default 400G port speed:

For example:

  • hw-module location 0/0/CPU0 port 0 breakout 1xHundredGigE

To remove the breakout configuration and revert to the default 400G port speed, use the no form of the command.

For example:

  • no hw-module location 0/0/CPU0 port 0 breakout 1xHundredGigE

To configure 4x100G or 2x100G or 3x100G muxponder mode, use the 4x100G or 2x100G or 3x100G breakout on the supported port(s).

For example:

  • hw-module location 0/0/CPU0 port 0 breakout 4xHundredGigE

  • hw-module location 0/0/CPU0 port 7 breakout 2xHundredGigE

  • hw-module location 0/0/CPU0 port 7 breakout 3xHundredGigE

To remove the breakout configuration and revert to the default 400G port speed, use the no form of the command.

For example:

  • no hw-module location 0/0/CPU0 port 0 breakout 4xHundredGigE

  • no hw-module location 0/0/CPU0 port 7 breakout 2xHundredGigE

  • no hw-module location 0/0/CPU0 port 7 breakout 3xHundredGigE

Muxponder Mode Configuration Example

The following example shows how to configure muxponder mode on the optics controller:
Router#config
Router(config)#hw-module location 0/0/CPU0 port 3 breakout 4xHundredGigE
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 ipv4 interface brief location | include R/S/I/P command.


Running Configuration

This example shows the running configuration for the optics controller:

Router#show running-config | inc break 
Building configuration...
hw-module location 0/1/CPU0 port 1 breakout 1xHundredGigE
hw-module location 0/1/CPU0 port 3 breakout 4xHundredGigE
hw-module location 0/1/CPU0 port 8 breakout 1xHundredGigE
 !

Verification

This example shows how to verify the muxponder mode configuration:

Router#show ipv4 interface brief location 0/1/CPU0 | inc 0/1/0/3
HundredGigE0/1/0/3/0 unassigned Shutdown Down default
HundredGigE0/1/0/3/1 unassigned Shutdown Down default
HundredGigE0/1/0/3/2 unassigned Shutdown Down default
HundredGigE0/1/0/3/3 unassigned Shutdown Down default

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:
Router#configure
Router(config)#controller optics 0/19/0/5
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 run controllers optics 0/19/0/5
controller 0/19/0/5
 fec CFEC
!

Verification

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

Router#show controller coherentdsp 0/19/0/5

Port                                            : CoherentDSP 0/19/0/5
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 = 0 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 = 1
Detected Alarms                                 : None

Bit Error Rate Information
PREFEC  BER                                     : 4.5E-04 
POSTFEC BER                                     : 0.0E+00 
Q-Factor                                        : 10.40 dB 
Q-Margin                                        : 3.20dB 
OTU TTI Received 

FEC mode                                        : C_FEC

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 0/1/0/9
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 0/1/0/9
controller Optics0/1/0/9
 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 controllers optics 0/1/0/9
Controller State: Up
Transport Admin State: In Service
Laser State: On
LED State: Green
FEC State: FEC OFEC
Optics Status

    Optics Type: 400G QSFP-DD 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:

    Laser Bias Current = 52.5 mA    
    Actual TX Power = -11.03 dBm
    RX Power = -12.15 dBm
    RX Signal Power = -12.15 dBm
    Frequency Offset = -140 MHz
    Laser Temperature = 52.45 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)          1.9      -23.0           0.0        -20.0
         Tx Power Threshold(dBm)          0.0      -18.0          -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 = -7.00 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 = 180.00 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 = 36.00 ps^2
    Optical Signal to Noise Ratio = 35.80 dB
    Polarization Dependent Loss = 0.08 dB
    Polarization Change Rate = 0.00 rad/s
    Differential Group Delay = 1.00 ps

    Temperature = 54.00 Celsius
    Voltage = 3.29 V

Transceiver Vendor Details

    Form Factor : QSFP-DD
    Optics type : QSFP-DD 400G-ZRP-S
    Name : CISCO-ACACIA
    OUI Number : 7c.b2.5c
    Part Number : DP04QSDD-E30-19D
    Rev Number : B0
    Serial Number : ACA2440001M
    PID : QDD-400G-ZRP-S
    VID : VES1
    Firmware Version : 61.20 (Build : 13)
    Date Code(yy/mm/dd) : 20/10/02

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

Chromatic Dispersion Configuration Example

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

Router#configure
Router(config)#controller optics 0/19/0/5
Router(config-Optics)#cd-max 2500
Router(config-Optics)#cd-min -2500
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 0/19/0/5
controller Optics0/19/0/5
 cd-min -2500
 cd-max 2500
 !

Verification

This example shows how to verify the configured chromatic dispersion values for the optics controller:

Router#show controller optics 0/19/0/5
 Controller State: Up 
 Transport Admin State: In Service 
 Laser State: On 
 LED State: Red 
 FEC State: FEC CFEC     
 Optics Status 

         Optics Type:  400G QSFP-DD 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:
         Laser Bias Current = 52.5 mA
         Actual TX Power = 2.02 dBm 
         RX Power = 0.91 dBm 
         RX Signal Power = -7.44 dBm 
         Frequency Offset = -65 MHz 
         Laser Temperature = 54.54 Celsius 
         Laser Age = 0 %
         DAC Rate = 1x1    
         Performance Monitoring: Enable

         THRESHOLD VALUES
         ----------------
         Parameter                 High Alarm  Low Alarm  High Warning  Low Warning
         ------------------------  ----------  ---------  ------------  -----------
         Rx Power Threshold(dBm)          1.9      -23.0           0.0        -20.0
         Tx Power Threshold(dBm)          0.0      -18.0          -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 = -7.00 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 = 180.00 ps 
         Baud Rate =  59.8437500000 GBd
         Modulation Type: 16QAM 
         Chromatic Dispersion 1 ps/nm 
         Configured CD-MIN -2500 ps/nm  CD-MAX 2500 ps/nm  
         Second Order Polarization Mode Dispersion = 39.00 ps^2 
         Optical Signal to Noise Ratio = 36.40 dB 
         Polarization Dependent Loss = 0.07 dB 
         Polarization Change Rate = 0.00 rad/s 
         Differential Group Delay = 5.00 ps 

         Temperature = 51.94 Celsius 
         Voltage = 3.31 V 

 Transceiver Vendor Details

         Form Factor            : QSFP-DD
         Optics type            : QSFP-DD 400G-ZR-S
         Name                   : CISCO-ACACIA
         OUI Number             : 7c.b2.5c
         Part Number            : DP04QSDD-E20-190
         Rev Number             : A 
         Serial Number          : ACA25220027
         PID                    : QDD-400G-ZR-S 
         VID                    : V01
         Firmware Version       : 61.20 (Build : 13) 
         Date Code(yy/mm/dd)    : 21/06/01

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. 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

-150

-104

-119

-150

-90

-105

-150

-59

-75

DP04QSDD-HE0

400G

Yes

1

-150

15

25

300G

200G

100G

1. The default optical transmit power (Tx) value is -10 dBm, however with TX shaping enabled the maximum power in 1x400G, 4x100G, 3x100G, and 2x100G 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:
Router#config
Router(config)#controller optics 0/19/0/3
Router(config-Optics)#transmit-power -70
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 0/19/0/3
Thu May 13 12:52:35.020 UTC
controller Optics0/19/0/3
 cd-min -4000
 cd-max 4000
 transmit-power -70
!

Verification

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

Router#show controller optics 0/19/0/3
 Controller State: Up 
 Transport Admin State: In Service 
 Laser State: On 
 LED State: Green 
 FEC State: FEC OFEC    
 Optics Status 

         Optics Type:  400G QSFP-DD 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:
         Laser Bias Current = 70.9 mA
         Actual TX Power = -7.06 dBm 
         RX Power = -7.88 dBm 
         RX Signal Power = -7.88 dBm 
         Frequency Offset = -220 MHz 
         Laser Temperature = 53.79 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)          1.9      -28.2           0.0        -25.0
         Tx Power Threshold(dBm)          0.0      -18.0          -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 = -7.00 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 = 180.00 ps 
         Baud Rate =  30.0692729950 GBd
         Modulation Type: QPSK 
         Chromatic Dispersion -2 ps/nm 
         Configured CD-MIN -4000 ps/nm  CD-MAX 4000 ps/nm  
         Second Order Polarization Mode Dispersion = 109.00 ps^2 
         Optical Signal to Noise Ratio = 32.30 dB 
         Polarization Dependent Loss = 0.05 dB 
         Polarization Change Rate = 0.00 rad/s 
         Differential Group Delay = 0.00 ps 
         Temperature = 48.00 Celsius 
         Voltage = 3.30 V 

 Transceiver Vendor Details

         Form Factor            : QSFP-DD
         Optics type            : QSFP-DD 400G-ZRP-S
         Name                   : CISCO-ACACIA
         OUI Number             : 7c.b2.5c
         Part Number            : DP04QSDD-E30-19E
         Rev Number             : 01
         Serial Number          : ACA2503003X
         PID                    : QDD-400G-ZRP-S 
         VID                    : ES03
         Firmware Version       : 61.20 (Build : 13)    
         Date Code(yy/mm/dd)    : 21/01/22

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 8. 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 9. 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:

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 Loopback

You can configure internal or line loopback on coherent DSP controllers. Loopback can be performed only in the maintenance mode.

Loopback Configuration Example

This example shows how to enable internal loopback configuration on coherent DSP controllers:

Router#config
Router(config)#controller coherentDSP 0/0/0/4
Router(config-CoDSP)#secondary-admin-state maintenance
Router(config-CoDSP)#loopback internal
Router(config-CoDSP)#commit

Running Configuration

This example shows the running configuration on coherent DSP controllers:

Router#show run controller coherentdsp 0/0/0/4
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

Laser Squelching

Table 10. Feature History Table

Feature Name

Release Information

Description

Disable Auto-Squelching

Release 7.10.1

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:

YANG DATA models:

This release introduces the support to disable auto-squelch functionality on the module on the host side. When enabled, the output 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 
    

Small Frame Padding

Table 11. Feature History Table

Feature Name

Release Information

Description

Small Frame Padding

Release 7.10.1

Small frame padding prevents packet drops caused by network congestion. If the minimum frame size requirement isn’t met, the frames drop, this enhancement ensures that your hardware ASIC adds extra bytes to the payload, thereby fulfilling the 68-byte minimum frame size requirement. By doing so, small frame padding significantly enhances network reliability and minimizes the risk of dropped frames due to congestion-related issues.

Previously, this feature was supported on the second and third generations of the ASR 9000 Series Ethernet line cards. Starting from this release, we extend this feature support to the fourth and fifth generations of the ASR 9000 Series Ethernet line cards.

Small frame padding refers to the technique of adding extra bytes to a transmitted data frame to ensure that the frame meets a minimum size requirement. In an ethernet based data transmission, a minimum of 68 bytes frame size is required to ensure reliable transmission and reception of data. If the minimum Ethernet frame length requirement isn't met, the frames are treated as runt frames and dropped. This feature enables the Cisco ASR 9000 routers to add frames to meet the transmission requirement of 68 bytes on the egress interface to seamlessly work with other interconnected networks.

Implementing small frame padding offers several key benefits:

  • Enhances network reliability: Small frame padding ensures that the minimum frame size is met, thereby helping to prevent data loss or corruption caused by network congestion, which can result in dropped frames.

  • Enhances network security: Small frame padding obscures the true size of data frames, making it difficult for attackers to identify patterns in network traffic, thereby contributing to a more secure network.

  • Improves performance: Small frame padding ensures more frequent transmission of frames, actively utilizing communication channels more often and optimizing network resource usage.

Small frame padding is supported on the following line cards:

  • Second generation of the ASR 9000 Series Ethernet line cards

  • Third generation of the ASR 9000 Series Ethernet line cards

  • Fourth generation of the ASR 9000 Series Ethernet line cards

  • Fifth generation of the ASR 9000 Series Ethernet line cards

Configuring small frame padding

This example shows how to configure the small-frame-padding command:


router(config)# interface HundredGigE 0/1/0/0
router(config-if)# small-frame-padding

Verification

This example shows how to verify the small-frame-padding configuration:


router(config)# show controller asic ls-np instance 0 76 register location 0/1/CPU0 | i HexPad
0x010480580  elf1Reg_elf1Sf0Cfg_elf1HexPadCfg 0x00000001 (4 bytes)
0x010480780  elf1Reg_elf1Sf1Cfg_elf1HexPadCfg 0x00000000 (4 bytes)

The NPU registers contain configurations for physical port numbers.

  • For 'elf1Reg_elf1Sf0Cfg', bits 0–19 are for physical port numbers ranging 0–19.

  • For 'elf1Reg_elf1Sf1Cfg', the bits 0–19 are for physical port numbers ranging from 20 to 39.

In the given example, HundredGigE 0/1/0/0 has a physical port number of 0. Hence, bit 0 on 'elf1Reg_elf1Sf0Cfg' is set to 1 after the small-frame-padding configuration.

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 -5000
Router(config-Optics)#cd-high-threshold 5000
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
controller Optics0/2/0/16
 cd-low-threshold 5000
 cd-high-threshold 5000
!

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 OFEC
 Optics Status
         Optics Type:  400G QSFP-DD 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            : QSFP-DD 400G-ZRP-S
         Name                   : CISCO-ACACIA
         OUI Number             : 7c.b2.5c
         Part Number            : DP04QSDD-E30-19E
         Rev Number             : 01
         Serial Number          : ACA2503003X
         PID                    : QDD-400G-ZRP-S 
         VID                    : ES03
         Firmware Version       : 61.20 (Build : 13)
         Date Code(yy/mm/dd)    : 21/01/22
!