Interface and Hardware Component Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 25.1.x, 25.2.x, 25.3.x
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Introduced in this release on: NCS 5500 modular routers;NCS 5700 line cards [Mode: Compatibility; Native](select variants only*)
This release introduces support for the Cisco 400G QSFP-DD Ultra Long-Haul (ULH) coherent optical module, on the Cisco NCS
5500 series modular chassis using the following line cards-
* Line cards:
NC57-24DD
NC57-18DD-SE
Support for DP04QSDD-ER1 optical module
Release 7.10.1
Introduced in this release on: NCS 5500 modular routers; NCS 5500 line cards(select variants only*)
This release introduces support for the Cisco DP04QSDD-ER1 Ethernet variant optical module.
The Cisco DP04QSDD-ER1 optical module is an enhanced version of the currently available QDD-400G-ZR Optical Module. It leverages
the same operational modes while providing an extended range of up to 40km using 16QAM transmission.
* The DP04QSDD-ER1 optical module is supported on Cisco NCS 5500 Series Modular Chassis through the NC57-18DD-SE line card.
Extended Support for DP04QSDD-HE0 optical module
Release 7.10.1
Introduced in this release on: NCS 5500 modular routers(select variants only*); NCS 5700 fixed port routers(select variants only*); NCS 5700 line cards [Mode: Compatibility; Native](select variants only*)
This release introduces support for the Cisco 400G QSFP-DD High-Power (Bright) Optical Module, Ethernet Variant on the following
routers and line cards-
* Routers:
NCS-57B1-6D24H-S
NCS-57B1-5D24-SE
NCS-57C1-48Q6-S
NCS-57D2-18DD-S
NCS-55A2 via NC57-MPA-2D4H-S
NC55-MOD via NC57-MPA-2D4H-S
* Line cards:
NC57-24DD
NC57-18DD-SE
NC57-36H6D-S
NC57-48Q2D-S
NCS-57B1-6D24H-S
NC57-MOD-S via NC57-MPA-2D4H-S
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.
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
2x100G-MXP-1x1.25 DAC-8 QAM
2x100G-MXP-1x1.25 DAC-16 QAM
This increases the interoperability of the QDD-400G-ZRP-S optical module across network components supporting these formats.
The following 400G Digital Coherent QSFP-DD optical modules are supported:
QDD-400G-ZR-S
QDD-400G-ZRP-S
DP04QSDD-HE0
DP04QSDD-ER1
DP04QSDD-ULH
Note
The information in this chapter applies to all supported 400G Digital Coherent QSFP-DD optical modules unless otherwise specified.
This chapter describes the 400G Digital Coherent QSFP-DD optical modules and their supported configurations.
Table 2. Hardware and Software Support
Hardware PID
Optics PID
Minimum IOS XR Software Release
NC57-18DD-SE
DP04QSDD-ULH
Release 25.2.1
NC57-24DD
DP04QSDD-ULH
Release 25.2.1
NC57-18DD-SE
DP04QSDD-ER1
Release 7.10.1
NC55-MOD-A-SE-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.9.1
NC55-MOD-A-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.9.1
NC57-MPA-2D4H-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
DP04QSDD-HE0
Release 7.9.1
NCS-57C3-MODS-SYS
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.8.1
NCS-57C3-MOD-SYS
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.8.1
NCS-57D2-18DD-SYS
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.8.1
DP04QSDD-HE0
Release 7.10.1
NC57-MOD-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.8.1
DP04QSDD-HE0
Release 7.10.1
NCS-57C1-48Q6D-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.5.2
NC57-48Q2D-S
DP04QSDD-HE0
Release 7.10.1
NCS-57B1-5D24-SE
DP04QSDD-HE0
Release 7.10.1
NCS-57C1-48Q6-S
DP04QSDD-HE0
Release 7.10.1
NC57-18DD-SE
DP04QSDD-HE0
Release 7.10.1
NCS-57B1-6D24H-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.3.2
DP04QSDD-HE0
Release 7.10.1
NC57-24DD
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.3.2
DP04QSDD-HE0
Release 7.10.1
NC57-18DD-SE
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.3.2
NC57-36H6D-S
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.3.2
DP04QSDD-HE0
Release 7.10.1
NCS-57B1-5D24H-SE
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.3.2
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, 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 400G Digital Coherent QSFP-DD 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 400G Digital Coherent QSFP-DD optical modules, the Cisco IOS XR software operates the fans at an higher speed to cool these optical modules.
The 400G Digital Coherent QSFP-DD optical module configuration is divided into the following categories:
Traffic configuration – Comprises configuring DAC rate, muxponder mode, modulation, and FEC parameters. Applicable for optics
controllers:
Performance monitoring (PM) – Enables or disables performance monitoring in optical modules. You can also configure PM parameters
that comprise signal power, chromatic dispersion, optical signal-to-noise ratio (OSNR), and differential group delay (DGD).
Applicable for optics controllers and coherent DSP controllers:
Alarms threshold configuration – Configures thresholds for monitoring alarms that include optical signal-to-noise ratio (OSNR),
differential group delay (DGD), chromatic dispersion (cd high and low), and so on. Applicable for optics controllers:
The following table contains the possible traffic configuration values for the 400G Digital Coherent QSFP-DD optical modules,
in the transponder and muxponder mode:
Table 3. 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.
DP04QSDD-ER1
1x400
1x400
C-Band, 193.70 THz
oFEC, cFEC
16QAM
1x1, 1x2
-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.
DP04QSDD-ULH
1x400, 4x100
400G, 100G
C-Band,191.275THz To 196.125THz
oFEC
QPSK, PCS (Probabilistic Constellation Shaping)
1x1
-13000 to 13000
Each optical module has its own transmitting (TX) power range. You can change the transmitting (TX) power value based on the
module capability.
Restrictions and Limitations
DP04QSDD-HE0 optical modules are supported on the NCS-57C3-MOD-SYS and NCS-57C3-MODS-SYS routers using NC57-MPA-2D4H-S MPA.
400G Digital Coherent QSFP-DD optical modules are supported on all 400G ports of the MPA (NC57-MPA-2D4H-S) available on the NC55-MOD-A-S and NC55-MOD-A-SE-S
line cards.
400G Digital Coherent QSFP-DD optical modules are supported on all 400G ports of the MPA (NC57-MPA-2D4H-S) available on the NCS-55A2-MOD-S and NCS-55A2-MOD-SE-S
routers.
400G Digital Coherent QSFP-DD optical modules are supported on all 400G ports of NC57-MOD-S line cards.
400G Digital Coherent QSFP-DD optical modules are supported on all 400G ports of fixed-port routers.
400G Digital Coherent QSFP-DD optical modules are supported only on 400G even-numbered ports (at the top row) of the line cards. In addition, the following
points describe the limitations of specific line cards:
NC57-24DD: All twelve 400G even-numbered ports support 400G Digital Coherent QSFP-DD optical modules.
NC57-18DD-SE: Up to a maximum of six 400G Digital Coherent QSFP-DD optical modules are supported in the 400G even-numbered ports.
NC57-36H6D-S: Up to a maximum of six 400G Digital Coherent QSFP-DD optical modules are supported in the 400G even-numbered ports.
The following platform combination doesn't support native 400G speed but can operate in 4x100G mode:
NCS-57C3-MOD-S/-SE-S with NC57-MPA-2D4H-S in MPA slot1
NC55-MOD-A-SE-S with NC57-MPA-2D4H-S
NCS-55A2-MOD-S/-HD-S/-HX-S with NC57-MPA-2D4H-S
The DP04QSDD-ULH optical module is supported on the following ports:
NC57-24DD: All twelve even-numbered 400G ports.
NC57-18DD-SE: Up to a maximum of six DP04QSDD-ULH optical modules are supported in the 400G even-numbered ports.
FPD Upgrades Enabled for QDD-400G-ZR-S and QDD-400G-ZRP-S Optical Modules
This feature allows you to perform Field Programmable Device (FPD) upgrades on the QDD-400G-ZR-S and QDD-400G-ZRP-S optical
modules to ensure they have the latest fixes and features. For more information about the optic module portfolio, see the
Cisco 400G Digital Coherent Optics QSFP-DD Optical Modules Data Sheet.
Although an FPD upgrade is not mandatory in this release, we recommend upgrading the FPD to the latest version in the subsequent
releases to ensure that all the latest fixes and features are enabled on the optical modules.
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules have two internal FPD image banks: image banks A and B. These image banks
contain running and programmed FPD versions, which are fetched during boot-up. The active image is fetched from bank A, while
the standby image is fetched from bank B. To upgrade the optical modules, you must perform the FPD upgrade twice, once for
the active image bank and once for the standby image bank. After each upgrade, you must disable and re-enable the QDD-400G-ZR-S
and QDD-400G-ZRP-S optical modules using the controller optics command to activate the latest firmware.
See the Upgrading Field-Programmable Device chapter in the System Management Configuration Guide for Cisco NCS 5500 Series Routers for details on the procedure to upgrade the FPD.
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 5. 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
DP04QSDD-ER1 Transponder and Muxponder Configuration Values
The following table contains the possible Transponder and Muxponder configuration values for the DP04QSDD-ER1 optical module:
Table 6. DP04QSDD-ER1 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
400G-TXP
1 client, 400G speed
1 trunk, 400G
16 QAM
oFEC
1x2
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 7. 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
4x100G-MXP
4 clients, 100G speed
1 trunk, 400G speed
16 QAM
oFEC
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
1x1.5
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
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 8. 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
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
DP04QSDD-ULH Transponder and Muxponder Configuration Values
Table 9. DP04QSDD-ULH Transponder and Muxponder Configuration Values
TXP/MXP
Client
Trunk
Modulation
FEC
DAC Rate
400G-TXP
1 client, 400G speed
1 trunk, 400G
QPSK, PCS (changes based on appsel values configured)
oFEC (changes based on appsel values configured)
1x1
4x100G-MXP
4 clients, 100G speed
1 trunk, 400G
QPSK, PCS (changes based on appsel values configured)
oFEC (changes based on appsel values configured)
1x1
Configuring Frequency
You can configure frequency on optics controllers. You can select any C band frequency between the range 196.1 to 191.3 THz,
in both ITU and NON-ITU channels.
Note
The 100MHz-grid keyword accepts only frequency values as user input. The 50GHz-grid keyword accepts frequency, ITU-channel,
or wavelength values as user input. The Cisco IOS XR software then caculates the frequency for a given wavelength or ITU-channel.
Frequency Configuration Example
The following example shows how to configure frequency on the optics controller:
Router#show run controller optics 0/2/0/16
Fri May 28 01:42:32.488 UTC
controller Optics0/2/0/16
dwdm-carrier 100MHz-grid frequency 1921500
cd-low-threshold -5000
cd-high-threshold -5000
!
Verification
This example shows how to verify the frequency configuration:
Router#show controller optics 0/2/0/16
Fri May 28 01:47:23.953 UTC
Controller State: Up
Transport Admin State: In Service
Laser State: Off
LED State: Off
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZRP
DWDM carrier Info: C BAND, MSA ITU Channel=80, Frequency=192.15THz,
Wavelength=1560.200nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 0
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 mA
Actual TX Power = -40.00 dBm
RX Power = -40.00 dBm
RX Signal Power = -40.00 dBm
Frequency Offset = 0 MHz
Laser Temperature = 0.00 Celsius
Laser Age = 0 %
DAC Rate = 1x1.25
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 13.0 -24.0 10.0 -22.0
Tx Power Threshold(dBm) 0.0 -16.0 -2.0 -14.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 0.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -10.00 dBm
Configured CD High Threshold = -5000 ps/nm
Configured CD lower Threshold = -5000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 60.1385459900 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -26000 ps/nm CD-MAX 26000 ps/nm
Second Order Polarization Mode Dispersion = 0.00 ps^2
Optical Signal to Noise Ratio = 0.00 dB
Polarization Dependent Loss = 0.00 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 0.00 ps
Temperature = 21.00 Celsius
Voltage = 3.42 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZRP
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E30-19E
Rev Number : 10
Serial Number : ACA244900GN
PID : QDD-400G-ZRP-S
VID : ES03
Firmware Version : 161.06
Date Code(yy/mm/dd) : 20/12/08
!
Configuring Chromatic Dispersion
You can configure chromatic dispersion on optics controllers. When you configure the maximum and minimum values for chromatic
dispersion for any data rate, ensure that the minimum difference between the configured values is equal to or greater than
1000 ps/nm.
The following table lists the default CD search range:
Table 10. Default CD Search Range
Muxponder Rate
FEC Value
Default CD Search Range (Min-Max)
400
OFEC
-26000 to +26000
400
CFEC
-2400 to +2400
300
OFEC
-50000 to +50000
200
OFEC
-50000 to +50000
100
OFEC
-80000 to +80000
Note
For cd-max and cd-min range details, see the controller optics command.
Chromatic Dispersion Configuration Example
This example shows how to configure chromatic dispersion on the optics controller:
This example shows the running configuration for the optics controller:
Router#show run controller optics 0/0/0/13
Thu May 13 12:24:42.353 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
!
Verification
This example shows how to verify the configured chromatic dispersion values for the optics controller:
Router#show controller optics 0/0/0/13
Controller State: Up
Transport Admin State: In Service
Laser State: On
LED State: Green
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZR
DWDM carrier Info: C BAND, MSA ITU Channel=61, Frequency=193.10THz,
Wavelength=1552.524nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 MHz
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 1.9 -28.2 0.0 -25.0
Tx Power Threshold(dBm) 0.0 -15.0 -2.0 -16.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 15.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -6.00 dBm
Configured CD High Threshold = 80000 ps/nm
Configured CD lower Threshold = -80000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 59.8437500000 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 ps^2
Optical Signal to Noise Ratio = 36.30 dB
Polarization Dependent Loss = 0.40 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZR
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E20-19E
Rev Number : 10
Serial Number : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring Optical Transmit Power
You can set the transmit power of the optical signal.
Each 400G Digital Coherent QSFP-DD 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 following data sheets:
Supported Range of Optical Transmit Power (Tx) Values (in units of 0.1dBm)1
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
DP04QSDD-ER1
400G
No
1
-90
-40
-70
DP04QSDD-ULH
400G
Yes
1
depends on the appsel configuration
depends on the appsel configuration
depends on the appsel configuration
100G
1. The default optical transmit power (Tx) value is -10 dBm, however with TX shaping enabled the maximum power in 1x400G,
4x100G, 3x100G, 2x100G, and 1x100G modes may be less than -10 dBm.
Transmitting Power Configuration Example
The following example shows how to configure the optical transmit (TX) power on the optics controller:
Using the no breakoutmuxponder mode command, you can switch from the muxponder mode to the transponder mode, on optics controllers.
Muxponder Mode Configuration Example
The following example shows how to configure muxponder mode on the optics controller:
Router#config
Router(config)#controller optics 0/0/0/13
Router(config-Optics)#breakout 4x100
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit
Note
In the above example, the Cisco IOS XR software creates four Ethernet clients with 100GE speed, which can be verified using
the show interfaces brief | include R/S/I/P command.
Running Configuration
This example shows the running configuration for the optics controller:
Router#show run controller optics 0/0/0/13
Thu May 13 12:24:42.353 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
breakout 4x100
!
Verification
This example shows how to verify the muxponder mode configuration:
Router#show interfaces brief | include 0/0/0/13Hu0/0/0/13/0 up up ARPA 1514 100000000
Hu0/0/0/13/1 up up ARPA 1514 100000000
Hu0/0/0/13/2 up up ARPA 1514 100000000
Hu0/0/0/13/3 up up ARPA 1514 100000000
Transponder Mode Configuration Example
The following example shows how to switch to the transponder mode, on the optics controller:
Router#config
Router(config)#controller optics 0/0/0/13
Router(config-Optics)#no breakout 4x100
Router(config-Optics)#commit
Router(config-Optics)#exit
Router(config)#exit
Note
The Cisco IOS XR software creates a single 400GE interface, which can be verified using the show interfaces brief | includeR/S/I/P command.
Running Configuration
This example shows the running configuration for the optics controller. The breakout configuration is absent in the running
configuration.
Router#show run controller optics 0/0/0/13
Thu May 13 13:51:20.330 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
transmit-power -100
!
Verification
This example shows how to verify the transponder mode configuration:
Router#show interfaces brief | include 0/0/0/13
FH0/0/0/13 up up ARPA 1514 400000000
Configuring Modulation
You can configure modulation on optics controllers. Based on the muxponder mode, you can choose the modulation.
Note
The system accepts any modulation value that is entered. However, if the modulation value is outside the supported range,
it is not configured on the optical module. Instead, the optical module is auto-configured with a valid modulation value.
To view this value, use the show controller opticsR/S/I/P command.
See the following tables for the supported modulation values:
Use the show controller opticsR/S/I/P command to verify the modulation value of the optical module.
Verification
This example shows how to verify the configured modulation value for the optics controller:
Router#show controller optics 0/0/0/1
Controller State: Up
Transport Admin State: In Service
Laser State: On
LED State: Green
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZR
DWDM carrier Info: C BAND, MSA ITU Channel=61, Frequency=193.10THz,
Wavelength=1552.524nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 MHz
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 1.9 -28.2 0.0 -25.0
Tx Power Threshold(dBm) 0.0 -15.0 -2.0 -16.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 15.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -6.00 dBm
Configured CD High Threshold = 80000 ps/nm
Configured CD lower Threshold = -80000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 59.8437500000 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 ps^2
Optical Signal to Noise Ratio = 36.30 dB
Polarization Dependent Loss = 0.40 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZR
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E20-19E
Rev Number : 10
Serial Number : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring DAC Rate
You can set the DAC (digital to analog conversion) sampling rate on optics controllers. You can modify the DAC sampling rate
only on the QDD-400G-ZRP-S and DP04QSDD-HE0 optical modules.
Note
QDD-400G-ZR-S supports 1x1 dac-rate in cFEC mode. QDD-400G-ZRP-S optical modules support 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#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-HE0 optical modules. 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-HE0 support cFEC and oFEC (open forward error correction).
FEC Configuration Example
The following sample shows how to configure FEC on the optics controller:
This example shows the running configuration on coherent DSP controllers:
Router#show run controller coherentdsp 0/0/0/4
Thu May 13 19:51:08.175 UTC
controller CoherentDSP0/0/0/4
secondary-admin-state maintenance
loopback internal
!
Verification
This example shows how to verify the loopback configuration on coherent DSP controllers:
Router#show controller coherentdsp 0/0/0/4
Thu May 27 17:28:51.960 UTC
Port : CoherentDSP 0/0/0/4
Controller State : Down
Inherited Secondary State : Normal
Configured Secondary State : Maintenance
Derived State : Maintenance
Loopback mode : Internal
BER Thresholds : SF = 1.0E-5 SD = 1.0E-7
Performance Monitoring : Enable
Bandwidth : 400.0Gb/s
Alarm Information:
LOS = 6 LOF = 0 LOM = 0
OOF = 0 OOM = 0 AIS = 0
IAE = 0 BIAE = 0 SF_BER = 0
SD_BER = 0 BDI = 0 TIM = 0
FECMISMATCH = 0 FEC-UNC = 0 FLEXO_GIDM = 0
FLEXO-MM = 0 FLEXO-LOM = 0 FLEXO-RDI = 0
FLEXO-LOF = 5
Detected Alarms : LOS
Bit Error Rate Information
PREFEC BER : 5.0E-01
POSTFEC BER : 0.0E+00
Q-Factor : 0.00 dB
Q-Margin : -7.20dB
OTU TTI Received
FEC mode : C_FEC
Disable Auto-Squelching
Table 15. Feature History Table
Feature Name
Release Information
Description
Disable Auto-Squelching
Release 7.11.1
Introduced in this release on: NCS 5500 modular routers; NCS 5700 fixed port routers
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.
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:
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 16. 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 17. 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 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 2000cd-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
!
Configuring FEC Alarm Threshold
Table 19. Feature History Table
Feature Name
Release Information
Description
Configurable FDD and FED Alarm Threshold Values
Release 24.3.1
Introduced in this release on: NCS 5700 Fixed Port Routers.
We now ensure that you have accurate data to initiate proactive maintenance for non-critical FEC errors or take prompt action
to prevent potential optical link data loss in your network. This is made possible because we've enabled the configuration
of FEC (Forward Error Correction) Detected Degrade (FDD) alarm threshold values for non-critical FEC errors and FEC Excessive
Degrade (FED) alarm threshold values for critical FEC errors. You can configure or clear these values for QDD-400G-ZR, QDD-400G-ZRP,
and DP04QSDD-HE0 optical modules.
Prior to this release, the router would automatically generate FEC alarms based on default threshold values.
The feature introduces these changes:
CLI:
Modified the controller optics command by adding the following keywords:
You can configure or clear the FDD and FED alarm threshold values for the DP04QSDD-ULH optical modules.
Forward Error Correction (FEC) is used to control errors during data transmission. FEC works by adding data redundancy to
the transmitted message. This redundancy allows the receiver to detect and correct a limited number of errors occurring anywhere
in the message, instead of the transmitter resending the entire message. For additional information on FEC, see Understanding FEC and Its Implementation.
There are two types of FEC alarms:
FEC Detected Degrade (FDD) alarm: The FDD alarm is raised when the link degradation is within the permissible limit and does
not cause traffic disruption. This alarm indicates the system is working harder than usual to maintain data transmission.
Link degradation could be due to issues in the cable, network congestion, or other hardware failure.
FEC Excessive Degrade (FED) alarm: The FED alarm is raised when the link degradation exceeds beyond the permissible limit
and causes traffic disruption. This alarm indicates the system is working harder than usual to maintain data transmission.
Without corrective measures, network performance deteriorates further and eventually results in traffic loss. Link degradation
could be due to issues in the cable, network congestion, or other hardware failure.
The FEC alarms threshold values can now be configured to control alarms (raise and clear FEC alarms) on both media and host
side of the optical tranceiver. The optical transceiver is divided into two sides, the host side, which is positioned towards
the router, and the media side, which is positioned towards the wire or cable media.
When the average bit error rate (BER) exceeds the raise threshold value, the FEC alarm is raised (or asserted). Similarly, when the BER drops below the clear threshold value, then the alarm is cleared (or de-asserted).
Guidelines and Restrictions for Setting the FEC Alarm Thresholds
The raise threshold value must always be greater than the clear threshold value for both FDD and FED alarms.
The raise or clear threshold value of FED alarm must always be greater than the raise or clear threshold value of the FDD alarm.
While the router configuration permits a range of 1 to 18446744073709551615, the router only supports a range of 1 to 2046000000000000000.
The threshold value provided by users is converted from a 64 bit number to a 16 bit number. As a result, there is minor variation
between the user provided value (configured value) and the programmed value. The user input (threshold value) is appended
with exponents relative to E-18.
Table 20.
Configured Value
Programmed Value (Displayed using the Show CLI command)
Pattern
1, 2, 3, ….,10
0, 1, 2,….,9
1<ConfiguredValue< 10,
show command value = ConfiguredValue - 1
1->>>0.9999, displayed as 0 and so on
11,12,13,….,99
1.0, 1.1, 1.2,…9.8
10<ConfiguredValue<99,
show command value = ConfiguredValue - 0.1
111,222,333…999
1.10, 2.21, 3.32
100<ConfiguredValue<999,
show command value = ConfiguredValue - 0.01
1111,1112,1113 upto 2047
1.110, 1.111, 1.112…
1000<ConfiguredValue< 2047
show command value = ConfiguredValue - 0.001
2050, 12345, 23456,65432,…
2.0500, 1.2300, 2.3400,6.5400…
2047<ConfiguredValue<maximum- range
show command value = first 3 digits appended by 0s
Configuration Examples to Set FEC Alarm Threshold
Examples to configure FEC alarm threshold:
Configuring FDD Alarm Thresholds
FDD Configuration Example
This example shows how to set FDD clear and raise alarm thresholds on the optics controller:
Introduced in this release on: NCS 5700 Fixed Port Routers.
The Media Link-down PreFEC Degrade functionality can be used to protect the media side of the optical transceiver during transmission
errors.
By using this feature, you can proactively switch the traffic to standby path when the BER counter crosses the threshold value.
This feature helps to avoid further traffic impact when the optical network reaches more noise or error.
The feature introduces these changes:
CLI:
Modified the controller optics command by adding the media link-down prefec-degrade keyword.
YANG Data Model:
New XPaths for Cisco-IOS-XR-controller-optics-oper.yang
New XPaths for Cisco-IOS-XR-um-cont-optics-fec-threshold-cfg.yang
The Media Link-down PreFEC Degrade functionality can be used to protect the media side of the optical transceiver during transmission
errors, such as errors due to noise, or data transmission errors. This feature is disabled by default. You can enable this
feature by using the media link-down prefec-degrade command.
Prerequisites for using Media Link-down PreFEC Degrade Functionality
To use the Media Link-down PreFEC Degrade functionality, you must configure the FEC Alarm Threshold. For information on configuring
FEC alarms threshold, see Configuring FEC Alarm Threshold.
About Media Link-down PreFEC Degrade Functionality
Prior to this release, the FEC Alarm Threshold functionality enabled you to configure the FEC alarms threshold values to control
alarms (raise and clear FEC alarms) on media and host side of the optical transceiver. Using the FEC Alarm Threshold functionality,
you can configure the FDD and FED alarm threshold values and set the raise threshold value and clear threshold value values to control alarms.
After you configure FEC Alarm Threshold and enable Media Link-down PreFEC Degrade functionality, you get the alarm notification
when the average bit error rate (BER) exceeds the threshold value. This triggers link-down and enables switchover functionality
automatically. The traffic is switched to standby path, and remains in the standby path until the alarm is cleared or based
on the settings done by the network operator.
Note
In Cisco IOS XR Release 24.3.1, the Link-down PreFEC Degrade feature is supported only on the media side of the optical transceiver.
Configure Media Link-down PreFEC Degrade
The purpose of this task is to enable the media link-down preFEC degrade functionality to proactively switch the traffic to
standby path.
Procedure
Step 1
Execute the media link-down prefec-degrade command to configure link-down preFEC degrade on the media side of the optics controller.
Execute the show running-config controller opticsR/S/I/P command to view the running configuration on the optics controller.
Example:
Router#show running-config controller optics 0/2/0/16
Thu May 13 20:18:55.957 UTC
controller Optics0/2/0/16
media link-down prefec-degrade
!
Step 3
Execute the show controller opticsR/S/I/P command to verify link-down preFEC degrade feature on optics controllers.
Example:
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: On
Media linkdown prefec degrade : Enabled
LED State: Green
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
!
Application select codes
Application select codes are configuration parameters that:
allow the host device to select the operating mode of a QDD optical module,
specify the media code to configure the module's optical side, and
enable direct control of the module’s application modes for operational flexibility.
Table 22. Feature History Table
Feature Name
Release Information
Feature Description
Application select code provisioning
Release 25.2.1
You can now configure application select codes directly on a QDD module by using a CLI. This simplifies provisioning by allowing
the selection of advertised application modes such as 400ZR, OpenZR+ and others. The router activates the selected code to
ensure compatibility and reduce configuration complexity.
This feature introduces these changes:
CLI:
The appsel simple code keyword is introduced in the Controller optics command.
The Common Management Interface Specification (CMIS) defines standardized rules for how QDD modules operate and how host devices
configure them. CMIS ensures routers and switches can communicate with and control optical modules from different manufacturers
consistently.
Each QDD module supports multiple operating modes, uniquely identified by an AppSel code (application select code). The AppSel
code includes an application descriptor, which explains how the module functions (for example, how signals are processed between
the module’s host side and media side). The media side, or optical side, of the module is configured according to the media
code within the AppSel code. Host software uses this code to manage the optical interface and to configure supporting components
such as the physical layer (PHY), SerDes, and MacPort.
Modules store a list of supported AppSel codes in EEPROM memory. This inventory allows the host system to identify which application
modes are available for use. Standard codes such as 400G-OIF-ZR and 400G-OpenZR+ ensure interoperability and alignment with
industry standards, whereas custom, third-party AppSel codes provide additional options but may create compatibility challenges
if a host device does not recognize them.
By selecting an application mode advertised by the module, users can customize module operation for their needs. AppSel codes
enable configuration of operation modes based on criteria such as:
Data rate (for example, 100GbE, 400GbE),
Signal type (examples include NRZ, PAM4, or others),
Signal processing between the host and media sides, and
Optical configuration based on the embedded media code.
AppSel supports operation modes based on these parameters:
Data rate, such as 100GbE or 400GbE
Signal type
Signal processing between host side and media side
Optical configuration, based on the media code, which is part of the AppSel code.
Benefits of AppSel code provisioning
These are the benefits of provisioning AppSel code:
Enable selection of any supported application mode on an optical module for maximum flexibility.
Allow direct configuration of NPU, PHY, and optical components to align with the chosen data path.
Eliminate the need for Cisco IOS XR to implement new proprietary modes for every vendor’s module, simplifying software requirements.
Provide straightforward configuration by letting the operator directly select the desired AppSel code, without requiring IOS
XR to interpret vendor-specific modes.
Remove the extra step of mapping custom vendor codes, reducing time-to-support for new modules.
Configuration guidelines and restrictions for AppSel code provisioning
Configuration guidelines for AppSel code provisioning
These configurations apply for AppSel code provisioning:
You must explicitly configure the AppSel code provisioning feature; it is not enabled by default.
If you remove a non-default application ID configuration, the system immediately reverts to the default application ID.
If you overwrite a valid application ID with an invalid one, the system reverts to the default application ID and raises an
alarm to indicate the invalid configuration.
Ensure that the number of configured applications does not exceed the module’s supported maximum as listed in the AppSel list.
Restrictions for AppSel code provisioning
These restrictions apply to AppSel code provisioning:
Do not attempt In Service Software Upgrade (ISSU) or In Service Software Downgrade (ISSD) on Cisco 8000 series routers; these
features are not supported.
Do not use Optical Transport Network (OTN) features; they are not supported for AppSel code provisioning.
How AppSel code provisioning works
AppSel code provisioning allows routers to dynamically configure pluggable optical modules, ensuring that each module operates
in the correct mode for data transmission between the host device and the optical network.
The key components involved in the process are:
Optical side: The portion of a pluggable module that connects to the optical network, converting electrical signals to optical
signals and vice versa.
Host side: The portion of the module that interfaces with the host device (such as a router or switch) and processes electrical
signals.
Optics driver: Software that collects supported application codes from the module, allows selection of a code, and programs
the chosen application code into the module.
Application codes: Unique identifiers representing supported operational modes of the optical module.
Optics Management Agent (MA): Software that provides default configurations to the optics driver when no user configuration
is specified and manages fallback behavior if no application code is selected.
Workflow
These stages describe how AppSel code provisioning process works.
When a pluggable optical module is inserted into a router, the AppSel code identifies the module’s available operational modes.
The AppSel code points to an application descriptor, serving as a reference for the operational mode’s configuration.
The application descriptor specifies the required transmission configuration, including how signals are processed between
host and media lanes.
The AppSel code containing the appropriate media code is used to configure the optical (media) side of the module.
The router (host) software applies the media code to set up the optical module’s interface accordingly.
Depending on the module’s host side interface, additional parameters such as PHY, NPU SerDes, and MacPort can be configured.
Once both host side and media side configurations are complete, the datapath between the host and the optical network is established.
Result
AppSel code provisioning completes the setup of both host and media interfaces on the optical module, ensuring correct, efficient,
and reliable operation for data transmission according to the selected operational mode.
Configure an AppSel code on an optical module
Configure the AppSel code to enable the optical module to operate in a specific application mode, such as 400ZR or OpenZR+.
AppSel codes are advertised by the module and must be validated before configuration. This ensures compatibility between the
host and the module.
Before you begin
Ensure the router is running Cisco IOS XR Software Release 25.2.1 or later.
Procedure
Step 1
Identify the AppSel code that needs to be configured on a particular port from the list of available appcodes.
Example:
Router# show controllers optics 0/0/0/0 appsel advertised
Router# show controllers optics 0/0/0/0 appsel detailed
Step 2
Enter configuration mode on the router.
Example:
Router# conf
Step 3
(Optional) Identify the controller optics interface and configure breakout to match with the AppSel code that you want to configure.
Example:
Router(config)# controller optics 0/0/0/0 breakout 4x100
Router# show controllers optics 0/0/0/0 appsel active
Sun Feb 2 20:00:47.776 UTC
Instance : 1
App-ID : 3
Host-ID : 17 ETH 400GAUI-8 C2M (Annex
Media-ID : 70 OpenZR+ ZR400-OFEC-16QAM
Host Lane Count : 8
Media Lane Count : 1
Host Lane Assign : 0x1
Media Lane Assign : 0x1
The optical module operates in the selected application mode, ensuring compatibility and optimal performance.
What to do next
Monitor the interface status and confirm the active AppSel code.
Ensure alarms are cleared, and the interface is operational.
Alarms Troubleshooting
Table 23. Feature History Table
Feature Name
Release
Description
Enhanced Alarm Prioritization, Monitoring, and Management
Release 7.10.1
Introduced in this release on: NCS 5500 fixed port routersNCS 5500 modular routers (NCS 5500 line cards)
In this release, we introduce enhanced alarm management that offers improved alarm prioritization, monitoring and management,
as listed below:
Suppression of LOL (Loss of Line) alarm when the LOS-P (Loss of Signal-Payload) alarm is generated. This prioritizes the
detection and handling of the LOS-P alarm.
Ability to clear alarm static counters using the command clear counters controller coherentDSP location. Clearing static counters enables you to monitor alarms generated for a definitive time period.
Suppression of warnings when the respective alarm is triggered. This prevents redundant or repetitive alerts.
This section contains the procedures for troubleshooting alarms.
CD Alarm
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The Chromatic Dispersion (CD) alarm is raised when the detected chromatic dispersion value is above or below the configured
threshold values.
Clear the CD Alarm
Procedure
Configure threshold value within range if CD value is not within the threshold range.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The Differential Group Delay (DGD) alarm is raised when the value of the differential group delay read by the pluggable port
module exceeds the configured threshold value.
Clear the DGD Alarm
Procedure
Configure the threshold value within range if DGD value is not within the threshold range.
Flexo LOF alarm is raised when loss of alignment is detected on the Flexo frame for more than 3ms.
Clear the FLEXO_LOF Alarm
Procedure
Identify and correct the underlying cause of mis-alignment. The Flexo LOF (Loss of Frame) alarm is cleared when good alignment
is detected on the Flexo frame for more than 3ms.
Flexo LOM (Loss of Multi-Frame) is raised when loss of multi-frame alignment is detected on the Flexo multi-frame for more
than 10ms
Clear the FLEXO_LOM Alarm
Procedure
Identify and correct the underlying cause of mis-alignment. The Flexo LOM alarm is cleared when good multi-frame alignment
is detected on the Flexo multi-frame.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The HI-RXPOWER alarm occurs on the client optics controller when the measured individual lane optical signal power of the
received signal exceeds the default threshold. The HI-RXPOWER alarm occurs on the trunk optics controller when the total optical
signal power of the received signal exceeds the default threshold.
Clear the HI-RXPOWER Alarm
Procedure
Physically verify by using a standard power meter that the optical input power is overcoming the expected power threshold.
Connect an attenuator accordingly.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Software
The HI-RXPOWER warning occurs on the client optics controller when the measured individual lane optical signal power of the
received signal exceeds the default threshold. The HI-RXPOWER warning occurs on the trunk optics controller when the total
optical signal power of the received signal exceeds the default threshold.
Clear the HI-RXPOWER Warn Alarm
Procedure
Physically verify by using a standard power meter that the optical input power is overcoming the expected power threshold.
Connect an attenuator accordingly.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The HI-TXPOWER alarm occurs on the client optics controller when the measured individual lane optical signal power of the
transmitted signal exceeds the default threshold. The HI-TXPOWER alarm occurs on the trunk optics controller when the total
optical signal power of the transmitted signal exceeds the default threshold.
Clear the HI-TXPOWER Alarm
Procedure
Physically verify by using a standard power meter that the optical output power is overcoming the expected power threshold.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Software
The HI-TXPOWER warning occurs on the client optics controller when the measured individual lane optical signal power of the
transmitted signal exceeds the default threshold. The HI-TXPOWER warning occurs on the trunk optics controller when the total
optical signal power of the transmitted signal exceeds the default threshold.
Clear the HI-TXPOWER Warn Alarm
Procedure
Physically verify by using a standard power meter that the optical output power is overcoming the expected power threshold.
Flexo LOF alarm is raised when loss of alignment is detected on the Flexo frame for more than 3ms.
Clear the LOF Alarm
Procedure
Identify and correct the underlying cause of mis-alignment. The Flexo LOF (Loss of Frame) alarm is cleared when good alignment
is detected on the Flexo frame for more than 3ms.
Flexo LOM (Loss of Multi-Frame) is raised when loss of multi-frame alignment is detected on the Flexo
multi-frame for more than 10ms
Clear the LOM Alarm
Procedure
Identify and correct the underlying cause of mis-alignment. The Flexo LOM alarm is cleared when good multi-frame alignment
is detected on the Flexo multi-frame.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The LO-RXPOWER alarm is raised on the client or trunk optics controller when the measured individual lane optical signal power
of the received signal falls below the default threshold.
Clear the LO-RXPOWER Alarm
Procedure
Verify that the trunk-rx port is cabled correctly and clean the fiber connecting the faulty TXP/MXP card to the drop port
of the DWDM card.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Software
The LO-RXPOWER warning is raised on the client or trunk optics controller when the measured individual lane optical signal
power of the received signal falls below the default threshold.
Clear the LO-RXPOWER Warn Alarm
Procedure
Verify that the trunk-rx port is cabled correctly and clean the fiber connecting the faulty TXP/MXP card to the drop port
of the DWDM card.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The LO-TXPOWER alarm is raised on the client or trunk optics controller when the measured individual lane optical signal power
of the transmitted signal falls below the default threshold.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Software
The LO-TXPOWER warning is raised on the client or trunk optics controller when the measured individual lane optical signal
power of the transmitted signal falls below the default threshold.
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: Controller
The Optical Signal Noise Ratio (OSNR) alarm occurs when the measured OSNR falls below the threshold.
Clear the OSNR Alarm
Procedure
Step 1
Verify the value of the minimum acceptable OSNR value of NCS 5500 using the show controller optics R/S/I/P command.
Step 2
If the value is not within the OSNR threshold range, configure the minimum acceptable OSNR value using the controller optics
R/S/I/P osnr-low-threshold command in the config mode. The range is 0–4000 (in units of 01db).
Step 3
If the value is within the range of the minimum acceptable OSNR, contact TAC.
Default Severity: Not Reported (NR), Not-Alarmed, Non-Service-Affecting (NSA)
Logical Object: OTN
The Uncorrected FEC Word (UNC-WORD) condition is raised when the FEC is unable to correct the frame.
Clear the UNC-WORD Alarm
Procedure
Step 1
Ensure that the fiber connector for the card is completely plugged in.
Step 2
Ensure that the ports on the far end and near end nodes have the same port rates and FEC settings.
Step 3
If the BER threshold is correct and at the expected level, use an optical test set to measure the power level of the line
to ensure it is within guidelines. For specific procedures to use the test set equipment, consult the manufacturer.
Step 4
If the optical power level is good, verify that the optical receive levels are within the acceptable range.
Step 5
If receive levels are good, clean the fibers at both ends.
Step 6
If the condition does not clear, verify that a single-mode fiber is used.
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