Configuration Guide for Cisco NCS 1014, IOS XR Releases 26.x.x

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Configuration Guide for Cisco NCS 1014, IOS XR Releases 26.x.x

Verify Rx VOA fixed ratio to zero

Updated: June 18, 2026

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Use this procedure to configure the Rx VOA attenuation to a fixed ratio of zero to disable the Rx VOA completely.

Use this task to configure the Rx VOA attenuation to a fixed ratio of zero, effectively disabling the Rx VOA entirely.

Warning

Disabling Rx VOA attenuation in certain scenarios may destabilize the network. Practice caution and contact the Cisco TAC team for more information.

Procedure

Run the configure command to enter the global configuration mode.

Example:

This is a sample configuration which sets the rx-voa fixed-ratio to zero.

RP/0/RP0/CPU0:NE80#configur
Tue Aug 6 07:44:28.125 UTC
Current Configuration Session  Line       User     Date                     Lock
00001000-00001569-00000000 vty0 cisco Tue Aug 6 05:33:16 2024
RP/0/RP0/CPU0:NE80(config)#controller optics 0/2/0/0 rx-voa fixed-ratio 0
RP/0/RP0/CPU0:NE80(config)#controller optics 0/2/0/7 rx-voa fixed-ratio 0
RP/0/RP0/CPU0:NE80(config)#commit
Tue Aug 6 07:44:48.545 UTC
RP/0/RP0/CPU0:NE80(config)#end

Verify Rx VOA fixed ratio to zero

Use this task to verify the Rx VOA attenuation to a fixed ratio of zero, effectively disabling the Rx VOA entirely.

Warning

Disabling Rx VOA attenuation in certain scenarios may destabilize the network. Practice caution and contact the Cisco TAC team for more information.

Procedure

1.

Run the show running-config controller command to verify the rx-voa fixed ratio is set to fixed ratio zero.

Example:


RP/0/RP0/CPU0:N112#show running-config controller optics 0/2/0/0
Thu May 16 09:19:51.223 UTC
description optics0/2/0/0
dwdm-carrier 100MHz-grid frequency 1909000
rx-voa fixed-ratio 0
2.

Run the show controllers optics command to verify whether the rx-voa fixed-ratio is set to fixed ratio zero.

Example:


RP/0/RP0/CPU0:123#show controllers optics 0/2/0/0
Controller State: Up 
Transport Admin State: In Service 
Laser State: On 
LED State: Green 
Optics Status 
Optics Type: CIM8 DWDM
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 %
Actual TX Power = 2.00 dBm 
RX Power = -0.01 dBm 
RX Signal Power = 1.94 dBm 
Frequency Offset = 0 MHz 
Performance Monitoring: Enable 
THRESHOLD VALUES
----------------
Parameter High Alarm Low Alarm High Warning Low Warning
------------------------ ---------- --------- ------------ -----------
Rx Power Threshold(dBm) 13.0 -17.0 0.0 0.0
Tx Power Threshold(dBm) 5.0 -13.0 0.0 0.0
LBC Threshold(mA) N/A N/A 0.00 0.00
LBC High Threshold = 90 % 
Configured Tx Power = 2.00 dBm 
Configured CD High Threshold = 180000 ps/nm 
Configured CD lower Threshold = -180000 ps/nm 
Configured OSNR lower Threshold = 20.40 dB 
Configured DGD Higher Threshold = 88.00 ps 
Baud Rate = 137.9783940000 GBd
Bits per Symbol = 3.5200000000 bits/symbol 
Modulation Type: PCS 
Chromatic Dispersion 0 ps/nm 
Configured CD-MIN -10000 ps/nm CD-MAX 48000 ps/nm 
Polarization Mode Dispersion = 0.0 ps 
Second Order Polarization Mode Dispersion = 44.00 ps^2 
Optical Signal to Noise Ratio = 36.60 dB 
SNR = 18.20 dB 
Polarization Dependent Loss = 0.40 dB 
Polarization Change Rate = 4639.00 rad/s 
Differential Group Delay = 2.00 ps 
Filter Roll Off Factor : 0.100 
Rx VOA Fixed Ratio : 0.00 dB
NLEQ Compensation Mode : 0
Cross Polarization Gain Mode : 10
Proprietary Submarine Parameters
Type : 1 Value : 0
Type : 2 Value : 0
Type : 3 Value : 0
Type : 4 Value : 0
Type : 5 Value : 10485760
Transceiver Vendor Details
Form Factor : CIM8
Name : ACACIA 
Part Number : 10-100508-01
Rev Number : 10
Serial Number : N/A
PID : CIM8-CE-K9
VID : VES1
Firmware Version : Major.Minor.Build
Active : 80.130.19
Inactive : 80.130.19
Date Code(yy/mm/dd) : 24/06/18
Fiber Connector Type: LC 
Otn Application Code: Not Set 
Sonet Application Code: Not Set 
Ethernet Compliance Code: Not set 
Transceiver Temperature : 36 Celsius
AINS Soak : None 
AINS Timer : 0h, 0m
AINS remaining time : 0 seconds