Interface and Hardware Component Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 24.1.x, 24.2.x, 24.3.x, and 24.4.x
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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:
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:
Traffic configuration – Comprises configuring DAC rate, breakout, and FEC parameters. Applicable for optics controllers:
Performance monitoring (PM) – Enables or disables performance monitoring in optical modules. You can also configure PM parameters
that comprise signal power, chromatic dispersion, optical signal-to-noise ratio (OSNR), and differential group delay (DGD).
Applicable for optics controllers and coherent DSP controllers:
Alarms threshold configuration – Configures thresholds for monitoring alarms that include optical signal-to-noise ratio (OSNR),
differential group delay (DGD), chromatic dispersion (cd high and low), and so on. Applicable for optics controllers:
The following table contains the possible traffic configuration values for the 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.
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 locationnode-idfpdfpd-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:
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:
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#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#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/nmConfigured 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:
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:
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:
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 24.4.1
Introduced in this release on: Fixed Systems(8200, 8700); Modular Systems (8800 [LC ASIC: P100]) (select variants only*).
*This feature is now supported on:
8212-32FH-M
8711-32FH-M
88-LC1-12TH24FH-E
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:
The controller optics command is modified to support a new optional keyword, host auto-squelch disable
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:
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:
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:
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