Interface and Hardware Component Configuration Guide for Cisco 8000 Series Routers, IOS XR Release 24.1.x, 24.2.x, 24.3.x
Bias-Free Language
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Added Support for DP04QSDD-ER1 and DP01QSDD-ZF1 Optical Modules
Release 24.3.1
This release introduces support for the following Optical Modules on the Cisco 8711-32FH-M router:
DP04QSDD-ER1 - Cisco 400G Quad Small Form-Factor Pluggable Double Density (QSFP-DD)
DP01QSDD-ZF1 - Cisco 100G Quad Small Form-Factor Pluggable Double Density (QSFP-DD)
Extended Support for DP04QSDD-HE0 Optical Module
Release 24.1.1
This release introduces support for the Cisco 400G QSFP-DD High-Power (Bright) Optical Module DP04QSDD-HE0, Ethernet Variant
on the following routers and line cards -
Routers:
Cisco 8201
Cisco 8202
Line cards:
8800-LC-36FH
88-LC0-36FH-M
Extended Support for DP04QSDD-HE0 Optical Module
Release 7.10.1
This release introduces support for the Cisco 400G QSFP-DD High-Power (Bright) Optical Module DP04QSDD-HE0, Ethernet Variant
on the Cisco 8608 router.
oFEC Traffic Configuration for QDD-400G-ZRP-S
Release 7.9.1
New Modulation and DAC Rate traffic configurations are supported on QDD-400G-ZRP-S optical module:
400G-TXP-1x1-16 QAM
4x100G-MXP-1x1-16 QAM
3x100G-MXP-1x1-8 QAM
2x100G-MXP-1x1-QPSK
2x100G-MXP-1x1.25-16 QAM
This increases the interoperability of the QDD-400G-ZRP-S optical module across network components supporting these formats.
Support for DP04QSDD-HE0 Optical Module
Release 7.9.1
The Cisco 400G QSFP-DD High-Power (Bright) Optical Module is an enhanced version of the currently available QSFP-DD ZR+ Optical
Module. It leverages the same operational modes but provides a major enhancement by increasing the Tx Optical Power up to
+1dBm.
From this release, the DP04QSDD-HE0 optical module is supported on the Cisco 8201-32FH and Cisco 8201-24H8FH routers.
Support for QDD-400G-ZRP-S Optical Module
Release 7.9.1
This release introduces support for the Cisco 400G QSFP-DD-ZRP-S Ethernet Variant on the Cisco 88-LC0-34H14FH line card.
Cisco offers a range of the new 400G Digital Coherent QSFP-DD optical modules. The optical modules that are available are:
QDD-400G-ZR-S
QDD-400G-ZRP-S
DP04QSDD-HE0
DP04QSDD-ER1
DP01QSDD-ZF1
This chapter describes various optical modules and their supported configurations. The following fixed-port routers, line
cards, from the indicated Cisco IOS XR software releases, support these optical modules.
Table 2. Fixed-Port Routers and Line Cards that Support various Optical Modules from Indicated Cisco IOS XR Software Releases
Fixed-Port Routers
Optics PID
Minimum IOS XR Software Release
Cisco 8201
QDD-400G-ZR-S
Release 7.3.15
QDD-400G-ZRP-S
DP04QSDD-HE0
Release 24.1.1
Cisco 8202
QDD-400G-ZR-S
Release 7.3.15
QDD-400G-ZRP-S
DP04QSDD-HE0
Release 24.1.1
Cisco 8711-32FH-M
DP04QSDD-ER1
DP01QSDD-ZF1
Release 24.3.1
Cisco 8101-32FH
QDD-400G-ZR-S
QDD-400G-ZRP-S
Release 7.3.2
Cisco 8201-32FH
DP04QSDD-HE0
Release 7.9.1
Cisco 8201-24H8FH
DP04QSDD-HE0
Release 7.9.1
Cisco 8608
DP04QSDD-HE0
Release 7.10.1
Line Cards
Optics PID
Minimum IOS XR Software Release
8800-LC-36FH
QDD-400G-ZR-S
Release 7.3.15
QDD-400G-ZRP-S
DP04QSDD-HE0
Release 24.1.1
88-LC0-36FH-M
QDD-400G-ZR-S
Release 7.3.15
QDD-400G-ZRP-S
DP04QSDD-HE0
Release 24.1.1
88-LC0-36FH
QDD-400G-ZR-S
Release 7.3.2
QDD-400G-ZRP-S
88-LC0-34H14FH
QDD-400G-ZRP-S
Release 7.9.1
Note
QDD-400G-ZR-S and QDD-400G-ZRP-S are not supported on 8102-64H fixed-port routers.
QDD-400G-ZRP-S and DP04QSDD-HE0 are not supported on odd-numbered ports of the following routers and line cards:
Cisco 8201
Cisco 8202
8800-LC-36FH
88-LC0-36FH-M
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules enable wavelength-division multiplexing (WDM) functionality in the router.
These optical modules are DWDM C-band (196.1 THz to 191.3 THz) tunable optical modules. They can be used in both transponder
and muxponder modes.
Cisco IOS XR software creates optics and coherent DSP controllers to configure and monitor the performance of the QDD-400G-ZR-S
and QDD-400G-ZRP-S optical modules. Optics controllers are used to configure and monitor optical parameters, such as frequency,
chromatic dispersion, transmitted output power, modulation, and so on. Coherent DSP controllers are used to monitor network
performance parameters like pre- and post-forward error correction (FEC) bit-error rate (pre-FEC BER, post-FEC BER), error
corrected bits (EC-BITS), and so on. Forward error correction (FEC) is configured using optical controllers and monitored
using coherent DSP controllers.
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules support traffic configuration and firmware download. The Cisco IOS XR
software collects performance monitoring data and alarms using versatile DOM (VDM).
Due to more power consumption by the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules, the Cisco IOS XR software operates
the fans at an higher speed to cool these optical modules.
The QDD-400G-ZR-S and QDD-400G-ZRP-S optical module configuration is divided into the following categories:
Traffic configuration – Comprises configuring DAC rate, muxponder mode, modulation, and FEC parameters. Applicable for optics
controllers:
Performance monitoring (PM) – Enables or disables performance monitoring in optical modules. You can also configure PM parameters
that comprise signal power, chromatic dispersion, optical signal-to-noise ratio (OSNR), and differential group delay (DGD).
Applicable for optics controllers and coherent DSP controllers:
Alarms threshold configuration – Configures thresholds for monitoring alarms that include optical signal-to-noise ratio (OSNR),
differential group delay (DGD), chromatic dispersion (cd high and low), and so on. Applicable for optics controllers:
The following table contains the possible traffic configuration values for the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules,
in the transponder and muxponder mode:
Table 3. 400G Digital Coherent QSFP-DD Traffic Configuration Values
QDD-400G-ZR-S
QDD-400G-ZRP-S
DP04QSDD-HE0
DP04QSDD-ER1
DP01QSDD-ZF1
Client Speed
1x400G, 4x100G
1x400G, 4x100G, 3x100G, 2x100G, 1x100G
Note
Release 7.3.15 supports only 1x400 and 4x100 client speed.
1x400G, 4x100G, 3x100G, 2x100G, 1x100G
1x400G, 2x200G, 4x100G
1x100G
Trunk Speed
400G
400G
, 300G, 200G, 1x100
Note
Release 7.3.15 supports only 400G trunk speed.
400G, 300G, 200G, 100G
400G
100G
Frequency
C-Band, 196.1 To 191.3 THz
C-Band, 196.1 To 191.3 THz
C-Band, 196.1 To 191.3 THz
193.7THz
193.7THz
FEC
cFEC
oFEC, cFEC
oFEC
cFEC, oFEC
oFEC
Modulation
16QAM
16QAM, 8QAM, QPSK
Release 7.3.15 supports only 16QAM.
16QAM, 8QAM, QPSK
16QAM
QPSK
DAC-Rate
1x1
1x1.25 (oFEC), 1x1 (cFEC)
1x1.25, 1x1
1x1
1x1
Chromatic Dispersion (CD)
-2400 to +2400
Release 7.3.15: -80000 to +80000
Release 7.3.2: -160000 to +160000
-160000 to +160000
-2400 to +2400
-2400 to +2400
Transmitted (Tx) Power
Each optical module has its own transmitting (TX) power range. You can change the transmitting (TX) power value based on the
module capability.
Each optical module has its own transmitting (TX) power optimal values. You can change the transmitting (TX) power value based
on the module capability.
Each optical module has its own transmitting (TX) power optimal values. You can change the transmitting (TX) power value based
on the module capability.
Fixed at maximum output around -9dBm.
Fixed at maximum output around -6dBm.
QDD-400G-ZR-S Transponder and Muxponder Configuration Values
The following table contains the possible Transponder and Muxponder configuration values for the QDD-400G-ZR-S optical module:
Table 4. QDD-400G-ZR-S Transponder and Muxponder Configuration Values
TXP/MXP
Client
Trunk
Modulation
FEC
DAC Rate
400G-TXP
1 client, 400G speed
1 trunk, 400G
16 QAM
cFEC
1x1
4x100G-MXP
4 clients, 100G speed
1 trunk, 400G
16 QAM
cFEC
1x1
QDD-400G-ZRP-S Transponder and Muxponder Configuration Values
The following table contains the possible Transponder and Muxponder configuration values for the QDD-400G-ZRP-S optical module:
Table 5. QDD-400G-ZRP-S Transponder and Muxponder Configuration Values
TXP/MXP
Client
Trunk
Modulation
FEC
DAC Rate
OpenZR+ Support
400G-TXP
1 Client, 400G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
400G-TXP
1 Client, 400G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1
400G-TXP
1 Client, 400G speed
1 trunk, 400G speed
16 QAM
cFEC
1x1
4x100G- MXP
4 clients, 100G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
4x100G-MXP
4 Client, 100G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1
4x100G- MXP
4 clients, 100G speed
1 trunk, 400G speed
16 QAM
cFEC
1x1
3x100G-MXP
3 clients, 100G speed
1 trunk, 400G speed
8 QAM
oFEC
1x1.25
3x100G-MXP
3 Client, 100G speed
1 trunk, 400G speed
8 QAM
oFEC
1x1
2x100G-MXP
2 clients, 100G speed
1 trunk, 200G speed
QPSK
oFEC
1x1.50
2x100G-MXP
2 Client, 100G speed
1 trunk, 400G speed
QPSK
oFEC
1x1
2x100G-MXP
2 Client, 100G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
1x100G-MXP
1 client, 100G
speed
1 trunk, 100G speed
QPSK
oFEC
1x1.50
The high optical performance DP04QSDD-HE0 QSFP-DD pluggable coherent optical module is developed for easy deployment in Reconfigurable
Optical Add/Drop Multiplexer (ROADM) line systems.
DP04QSDD-HE0 Transponder and Muxponder Configuration Values
The following table contains the possible Transponder and Muxponder configuration values for the DP04QSDD-HE0 optical module:
Table 6. DP04QSDD-HE0 Transponder and Muxponder Configuration Values
TXP/MXP
Client
Trunk
Modulation
FEC
DAC Rate
400G-TXP
1 Client, 400G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
100G-TXP
1 Client, 100G speed
1 trunk, 400G speed
QPSK
oFEC
1x1.50
4x100G- MXP
4 clients, 100G speed
1 trunk, 400G speed
16 QAM
oFEC
1x1.25
3x100G-MXP
3 clients, 100G speed
1 trunk, 400G speed
8 QAM
oFEC
1x1.25
2x100-MXP
2 Client, 100G speed
2 Client, 100G speed
QPSK
oFEC
1x1.50
Configuring Frequency
You can configure frequency on optics controllers. You can select any C band frequency between the range 196.1 to 191.3 THz,
in both ITU and NON-ITU channels.
Note
The 100MHz-grid keyword accepts only frequency values as user input. The 50GHz-grid keyword accepts frequency, ITU-channel,
or wavelength values as user input. The Cisco IOS XR software then caculates the frequency for a given wavelength or ITU-channel.
Frequency Configuration Example
The following example shows how to configure frequency on the optics controller:
Router#show run controller optics 0/2/0/16
Fri May 28 01:42:32.488 UTC
controller Optics0/2/0/16
dwdm-carrier 100MHz-grid frequency 1921500
cd-low-threshold -5000
cd-high-threshold -5000
!
Verification
This example shows how to verify the frequency configuration:
Router#show controller optics 0/2/0/16
Fri May 28 01:47:23.953 UTC
Controller State: Up
Transport Admin State: In Service
Laser State: Off
LED State: Off
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZRP
DWDM carrier Info: C BAND, MSA ITU Channel=80, Frequency=192.15THz,
Wavelength=1560.200nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 0
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 mA
Actual TX Power = -40.00 dBm
RX Power = -40.00 dBm
RX Signal Power = -40.00 dBm
Frequency Offset = 0 MHz
Laser Temperature = 0.00 Celsius
Laser Age = 0 %
DAC Rate = 1x1.25
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 13.0 -24.0 10.0 -22.0
Tx Power Threshold(dBm) 0.0 -16.0 -2.0 -14.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 0.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -10.00 dBm
Configured CD High Threshold = -5000 ps/nm
Configured CD lower Threshold = -5000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 60.1385459900 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -26000 ps/nm CD-MAX 26000 ps/nm
Second Order Polarization Mode Dispersion = 0.00 ps^2
Optical Signal to Noise Ratio = 0.00 dB
Polarization Dependent Loss = 0.00 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 0.00 ps
Temperature = 21.00 Celsius
Voltage = 3.42 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZRP
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E30-19E
Rev Number : 10
Serial Number : ACA244900GN
PID : QDD-400G-ZRP-S
VID : ES03
Firmware Version : 161.06
Date Code(yy/mm/dd) : 20/12/08
!
Configuring Chromatic Dispersion
You can configure chromatic dispersion on optics controllers. When you configure the maximum and minimum values for chromatic
dispersion for any data rate, ensure that the minimum difference between the configured values is equal to or greater than
1000 ps/nm.
The following table lists the default CD search range:
Table 7. Default CD Search Range
Muxponder Rate
FEC Value
Default CD Search Range (Min-Max)
400
OFEC
-26000 to +26000
400
CFEC
-2400 to +2400
300
OFEC
-50000 to +50000
200
OFEC
-50000 to +50000
100
OFEC
-80000 to +80000
Chromatic Dispersion Configuration Example
This example shows how to configure chromatic dispersion on the optics controller:
This example shows the running configuration for the optics controller:
Router#show run controller optics 0/0/0/13
Thu May 13 12:24:42.353 UTC
controller Optics0/0/0/13
cd-min -4000
cd-max 4000
!
Verification
This example shows how to verify the configured chromatic dispersion values for the optics controller:
Router#show controller optics 0/0/0/13
Controller State: Up
Transport Admin State: In Service
Laser State: On
LED State: Green
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZR
DWDM carrier Info: C BAND, MSA ITU Channel=61, Frequency=193.10THz,
Wavelength=1552.524nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 MHz
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 1.9 -28.2 0.0 -25.0
Tx Power Threshold(dBm) 0.0 -15.0 -2.0 -16.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 15.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -6.00 dBm
Configured CD High Threshold = 80000 ps/nm
Configured CD lower Threshold = -80000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 59.8437500000 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 ps^2
Optical Signal to Noise Ratio = 36.30 dB
Polarization Dependent Loss = 0.40 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZR
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E20-19E
Rev Number : 10
Serial Number : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring Optical Transmit Power
You can set the transmit power of the optical signal.
Each QDD-400G-ZR-S and QDD-400G-ZRP-S optical module has its own optical transmit (TX) power range. You can change the optical
transmit (TX) power value based on the module capability. For "Transmitter specifications", see the Cisco 400G Digital Coherent Optics QSFP-DD Optical Modules Data Sheet.
Table 8. Optical Transmit Power Values
Optical Module
Trunk Speed1,3
Optical Transmit Power (Tx) Shaping
Interval
Supported Range of Optical Transmit Power (Tx) Values (in units of 0.1dBm)2
Minimum Value
Maximum Value - Typical
Maximum Value - Worst Case
QDD-400G-ZR-S
400G
No
1
-150
-100
-100
QDD-400G-ZRP-S
400G
Yes
1
-150
-110
-130
300G
-150
-104
-119
200G
-150
-90
-105
100G
-150
-59
-75
DP04QSDD-HE0
400G
Yes
1
-100
20
10
300G
200G
100G
1. Release 7.3.15 supports 4x100G muxponder mode or trunk speed.
2. The default optical transmit power (Tx) value is -10 dBm, however with Tx shaping enabled the maximum power in 1x400G, 4x100G, 3x100G, 2x100G, and 1x100G modes may be less than -10 dBm.
3. Release 7.3.2 and future releases support 3x100G, 2x100G, and 1x100G muxponder modes or trunk speed.
Transmitting Power Configuration Example
The following example shows how to configure the optical transmit (TX) power on the optics controller:
This example shows the running configuration for the optics controller:
Router#show run controller optics 0/2/0/16
Thu May 13 12:52:35.020 UTC
controller Optics0/0/0/1
cd-min -4000
cd-max 4000
transmit-power -125
!
Verification
This example shows how to verify the configured optical transmit power for the optics controller:
Router#show controller optics 0/2/0/16
Fri May 28 02:52:06.182 UTC
Controller State: Up
Transport Admin State: In Service
Laser State: Off
LED State: Off
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZRP
DWDM carrier Info: C BAND, MSA ITU Channel=80, Frequency=192.15THz,
Wavelength=1560.200nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 0
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 mA
Actual TX Power = -40.00 dBm
RX Power = -40.00 dBm
RX Signal Power = -40.00 dBm
Frequency Offset = 0 MHz
Laser Temperature = 0.00 Celsius
Laser Age = 0 %
DAC Rate = 1x1.25
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 13.0 -24.0 10.0 -22.0
Tx Power Threshold(dBm) 0.0 -16.0 -2.0 -14.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 0.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -12.50 dBm
Configured CD High Threshold = -5000 ps/nm
Configured CD lower Threshold = -5000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 60.1385459900 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 0.00 ps^2
Optical Signal to Noise Ratio = 0.00 dB
Polarization Dependent Loss = 0.00 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 0.00 ps
Temperature = 20.00 Celsius
Voltage = 3.41 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZRP
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E30-19E
Rev Number : 10
Serial Number : ACA244900GN
PID : QDD-400G-ZRP-S
VID : ES03
Firmware Version : 161.06
Date Code(yy/mm/dd) : 20/12/08
Configuring Muxponder Mode
By default, the Cisco IOS XR software configures the QDD-400G-ZR-S and QDD-400G-ZRP-S optical modules in the 400G transponder
mode.
Using the breakoutmuxponder mode command, you can configure muxponder mode on optics controllers. Based on the muxponder mode, you can choose the modulation.
Muxponder mode options available for QDD-400G-ZR-S are:
4x100
Muxponder mode options available for QDD-400G-ZRP-S are:
4x100
3x100
2x100
Note
Release 7.3.15 supports only 4x100 muxponder mode.
See the following tables for the modulation values, based on the muxponder mode:
Using the no 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-HE optical module.
Note
QDD-400G-ZR-S supports 1x1 dac-rate in cFEC mode. QDD-400G-ZRP-S and DP04QSDD-HE supports 1x1 dac-rate in cFEC mode and 1x1.25 dac-rate in oFEC mode.
DAC Rate Configuration Example
The following example shows how to set the DAC rate on the optics controller:
Router#show run controller optics 0/0/0/1
Thu May 13 12:52:35.020 UTC
controller Optics0/0/0/1
cd-min -4000
cd-max 4000
transmit-power -100
modulation 16Qam
DAC-Rate 1x1
!
!
Verification
This example shows how to verify the configured DAC rate for the optics controller:
Router#show controller optics 0/0/0/1
Controller State: Up
Transport Admin State: In Service
Laser State: On
LED State: Green
FEC State: FEC ENABLED
Optics Status
Optics Type: QSFPDD 400G ZR
DWDM carrier Info: C BAND, MSA ITU Channel=61, Frequency=193.10THz,
Wavelength=1552.524nm
Alarm Status:
-------------
Detected Alarms: None
LOS/LOL/Fault Status:
Alarm Statistics:
-------------
HIGH-RX-PWR = 0 LOW-RX-PWR = 0
HIGH-TX-PWR = 0 LOW-TX-PWR = 0
HIGH-LBC = 0 HIGH-DGD = 0
OOR-CD = 0 OSNR = 35
WVL-OOL = 0 MEA = 0
IMPROPER-REM = 0
TX-POWER-PROV-MISMATCH = 0
Laser Bias Current = 0.0 %
Actual TX Power = -7.87 dBm
RX Power = -8.27 dBm
RX Signal Power = -8.43 dBm
Frequency Offset = 130 MHz
DAC Rate = 1x1
Performance Monitoring: Enable
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 1.9 -28.2 0.0 -25.0
Tx Power Threshold(dBm) 0.0 -15.0 -2.0 -16.0
LBC Threshold(mA) 0.00 0.00 0.00 0.00
Temp. Threshold(celsius) 80.00 -5.00 75.00 15.00
Voltage Threshold(volt) 3.46 3.13 3.43 3.16
LBC High Threshold = 98 %
Configured Tx Power = -6.00 dBm
Configured CD High Threshold = 80000 ps/nm
Configured CD lower Threshold = -80000 ps/nm
Configured OSNR lower Threshold = 9.00 dB
Configured DGD Higher Threshold = 80.00 ps
Baud Rate = 59.8437500000 GBd
Modulation Type: 16QAM
Chromatic Dispersion 0 ps/nm
Configured CD-MIN -4000 ps/nm CD-MAX 4000 ps/nm
Second Order Polarization Mode Dispersion = 5.00 ps^2
Optical Signal to Noise Ratio = 36.30 dB
Polarization Dependent Loss = 0.40 dB
Polarization Change Rate = 0.00 rad/s
Differential Group Delay = 4.00 ps
Temperature = 54.00 Celsius
Voltage = 3.37 V
Transceiver Vendor Details
Form Factor : QSFP-DD
Optics type : QSFPDD 400G ZR
Name : CISCO-ACACIA
OUI Number : 7c.b2.5c
Part Number : DP04QSDD-E20-19E
Rev Number : 10
Serial Number : ACA2447003L
PID : QDD-400G-ZR-S
VID : ES03
Firmware Version : 61.12
Date Code(yy/mm/dd) : 20/12/02
Configuring FEC
You can configure forward error correction (FEC) only on optics controllers. You can modify FEC only on the QDD-400G-ZRP-S
and DP04QSDD-HE optical module. FEC is a feature that is used for controlling errors during data transmission. This feature works by adding
data redundancy to the transmitted message using an algorithm. This redundancy allows the receiver to detect and correct a
limited number of errors occurring anywhere in the message, instead of having to ask the transmitter to resend the message.
Note
QDD-400G-ZR-S supports cFEC (concatenated forward error correction). QDD-400G-ZRP-S and DP04QSDD-HE supports cFEC and oFEC (open forward error correction).
FEC Configuration Example
The following sample shows how to configure FEC on the optics controller:
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 9. Feature History Table
Feature Name
Release Information
Description
Disable Auto-Squelching
Release 7.11.1
This release introduces support to disable Auto squelching. This helps to detect weak signals that are hidden within the laser
source noise. By disabling Auto squelch, you can reduce the processing overhead in systems that have stable laser sources
and minimal noise, helping you optimize the performance of your system. When the Auto squelch function is enabled, the optical
module will generate a local fault signal on the host side if it detects a fault on the media side. By default, Auto squelch
is enabled.
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:
In this release, we've added two new parameters for performance monitoring. These parameters allow you to check the quality
of electrical signals between an ASIC or NPU and the 400G Digital Coherent QSFP-DD optical modules periodically. This helps
to detect errors occurring during data transmission and link initialization.
This feature introduces new parameters Host-Intf-{n}-FEC-BER and Host-Intf-{n}-FEC-FERC in the show controllers coherentdsp command.
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.
Release 24.2.11 introduces the following host PM parameters:
Host-Intf-{n}-FEC-BER
Host-Intf-{n}-FEC-FERC
The following table lists the details of the host PM parameters:
Table 10. Performance Monitoring Parameters
PM Parameter
Mode Type
Number of Host Interfaces
Description
Host-Intf-{n}-FEC-BER
Transponder
1
n=0
For example, Host-Intf-0-FEC-BER
Muxponder
4
n = 0, 1, 2, and 3.
For example:
Host-Intf-0-FEC-BER
Host-Intf-1-FEC-BER
Host-Intf-2-FEC-BER
Host-Intf-3-FEC-BER
Host-Intf-{n}-FEC-FERC
Transponder
1
n=0
For example, Host-Intf-0-FEC-FERC
Muxponder
4
n = 0, 1, 2, and 3
For example:
Host-Intf-0-FEC-FERC
Host-Intf-1-FEC-FERC
Host-Intf-2-FEC-FERC
Host-Intf-3-FEC-FERC
These parameters check the quality of electrical signals between an ASIC or NPU and the 400G Digital Coherent QSFP-DD optical
modules. The Cisco IOS XR software installed on the router collects Bit Error Rate (BER) and Frame Error Counters (FERC) information
from the optical modules and maintains history for 30-sec, 15-minute, and 24-hours intervals.
Note
You can check these signals for host interfaces in both transponder and muxponder mode.
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 11. 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 12. PM Thresholds TCA Report Status for Coherent DSP Controllers
PM Parameters
Description
Q
Sets the Q threshold or TCA reporting status.
Q-margin
Sets the Q margin threshold or TCA reporting status.
EC-BITS
Sets the EC-BITS (error corrected bits) threshold or TCA reporting status.
PostFEC BER
Sets the post-FEC BER threshold or TCA reporting status.
PreFEC BER
Sets the pre-FEC BER threshold or TCA reporting status.
UC-WORDS
Sets the UC-WORDS (uncorrected words) threshold or TCA reporting status.
Host-Intf-0-FEC-BER
Sets the Host-Intf-0-FEC-BER threshold or TCA reporting status, where:
AVG - specifies the number of corrected bits received from the host interface prior to a PM interval.
MIN - specifies the minimum number of corrected bits received from the host interface over a sub-interval and prior to a PM
interval.
MAX - specifies the maximum number of corrected bits received from the host interface over a sub-interval and prior to a PM
interval.
Host-Intf-0-FEC-FERC
Sets the Host-Intf-0-FEC-FERC threshold or TCA reporting status, where:
AVG - specifies the number of frames received from the host interface during a sub-interval.
MIN - specifies the minimum number of frames received from the host interface with uncorrected errors over a sub-interval
and prior to a PM interval.
MAX - specifies the maximum number of frames received from the host interface with uncorrected errors over a sub-interval
and prior to a PM interval.
Performance Monitoring Configuration Example
This example shows how to enable performance monitoring and set PM thresholds on the optics controller:
Router#config
Router(config)#controller optics 0/2/0/16
Router(config-Optics)#perf-mon enable
Router(config-Optics)#pm 30-sec optics threshold cd max 100
Router(config-Optics)#pm 30-sec optics threshold cd min -100
Router(config-Optics)#commit
Running Configuration
This example shows the running configuration on optics controllers:
Router#show run controller optics 0/2/0/16
Thu May 13 20:18:55.957 UTC
controller Optics0/2/0/16
pm 30-sec optics threshold cd max 100
pm 30-sec optics threshold cd min -100
perf-mon enable
!
Verification
This example shows how to verify the PM parameters on optics controllers. Verify the configuration changes in the Configured
Threshold fields:
Router#show controller optics 0/2/0/16 pm current 30-sec optics 1
Thu May 27 17:58:49.889 UTC
Optics in the current interval [17:58:30 - 17:58:49 Thu May 27 2021]
Optics current bucket type : Valid
MIN AVG MAX Operational Configured TCA Operational Configured TCA
Threshold(min) Threshold(min) (min) Threshold(max) Threshold(max) (max)
LBC[mA ] : 0.0 0.0 0.0 0.0 NA NO 100.0 NA NO
OPT[dBm] : -9.98 -9.98 -9.98 -15.09 NA NO 0.00 NA NO
OPR[dBm] : -40.00 -40.00 -40.00 -30.00 NA NO 8.00 NA NO
CD[ps/nm] : 0 0 0 -80000 -100 NO 100 100 NO
DGD[ps ] : 0.00 0.00 0.00 0.00 NA NO 80.00 NA NO
SOPMD[ps^2] : 0.00 0.00 0.00 0.00 NA NO 2000.00 NA NO
OSNR[dB] : 0.00 0.00 0.00 0.00 NA NO 40.00 NA NO
PDL[dB] : 0.00 0.00 0.00 0.00 NA NO 7.00 NA NO
PCR[rad/s] : 0.00 0.00 0.00 0.00 NA NO 2500000.00 NA NO
RX_SIG[dBm] : -40.00 -40.00 -40.00 -30.00 NA NO 1.00 NA NO
FREQ_OFF[Mhz]: 0 0 0 -3600 NA NO 3600 NA NO
SNR[dB] : 0.00 0.00 0.00 7.00 NA NO 100.00 NA NO
Last clearing of "show controllers OPTICS" counters never
!
Performance Monitoring Configuration Example
This example shows how to enable performance monitoring and set PM thresholds and TCA reporting status on the coherent DSP
controller:
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 14. Feature History Table
Feature Name
Release Information
Description
Configurable FDD and FED Alarm Threshold Values
Release 24.1.1
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:
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 15.
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
Introduced in this release on: Fixed Systems(8200, 8700); Centralized Systems (8600); Modular Systems (8800 [LC ASIC: Q100, Q200, P100]).
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
!
Alarms Troubleshooting
Table 17. Feature History Table
Feature Name
Release
Description
Enhanced Alarm Prioritization, Monitoring, and Management
Release 24.1.1
To improve alarm prioritization, precise monitoring, and streamlined management, ensuring a more efficient and responsive
approach to network events, we have introduced the suppression of LOL (Loss of Line) alarms when the LOS-P (Loss of Signal-Payload)
alarm is generated, the clearing of alarm static counters, and the suppression of warnings when the respective alarm is triggered.
In this latest release, we bring forth advanced features to elevate your alarm management experience. The key highlights include:
LOL Alarm Suppression: Prioritize the detection and handling of critical LOS-P (Loss of Signal-Payload) alarms by suppressing LOL (Loss of Line)
alarms when LOS-P alarms are generated.
Clearing Static Counters: Gain the ability to clear alarm static counters using the command clear counters controller coherentDSP location, facilitating
focused monitoring within a specific time frame.
Warning Suppression: Enhance your monitoring environment by suppressing warnings when the corresponding alarm is triggered, effectively preventing
redundant or repetitive alerts.
These enhancements collectively contribute to improved alarm prioritization, precise monitoring, and streamlined management,
ensuring a more efficient and responsive approach to network events.
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.
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.
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 Cisco 8000 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 to 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.
Step 7
Verify if the fiber is of single-mode type.
Step 8
Clean the fiber connectors at both ends for a signal degrade.
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