For checking transmission links on Huawei routers, it is important to know how to check the optical power of 400GE modules or interfaces for troubleshooting and to ensure the desired or optimal range is met.
Here are the sample commands for checking the Transmit/Output (TX) and Receive/Input (RX) optical power.
display optical-module base information interface <interface-name>
<Huawei-Router1>display optical-module base information interface 400GE1/0/0
===============================================================================
Optical Transceiver Base Information
=============|=================================================================
Card0-Port0 +
————-|—————————————————————–
Factor/Module : QSFP-DD
Standard : 400ZR Single Wavelength
Vendor PN : CTR-D2F5C-B
Vendor Name : HG GENUINE
Transceiver Maximal BW : 400G
Transceiver Mode : SingleMode
Connector Type : LC
WaveLength : 1547.70nm
Transceiver Distance : 80km
Rx Optical Power Total : -12.540dBm
Rx Optical Power : -12.580dBm
Tx Optical Power : 4.010dBm
Rx Power Total Warning Range: [-20.010, 1.000]dBm
Rx Power Warning Range : [-20.010, 1.000]dBm
Tx Power Warning Range : [2.000, 6.000]dBm
The Optical Match Result : Normal
The Vendor Private Information : NA
=============|=================================================================
display optical-module extend information interface <interface-name>
Sample Output:
<Huawei-Router1>display optical-module extend information interface 400GE1/0/0
===============================================================================
Transceiver Digital Diagnostic Monitoring (DDM), Internally Calibrated
=============|=================================================================
Card0-Port0 + Value HighAlarm HighWarn LowWarn LowAlarm Status
————-|—————————————————————–
Temperature(C) 52.332 85.000 75.000 0.000 -10.000 Normal
Supply Voltage(V) 3.318 3.630 3.465 3.135 2.970 Normal
Tx Bias(mA) 168.496 450.000 439.503 0.000 0.000 Normal
Tx Power(avg dBm) 4.007 7.000 6.000 2.000 1.000 Normal
Rx Power(avg dBm) -12.644 6.000 1.000 -20.010 -22.010 Normal
Rx Power Total(avg dbm) -12.540 6.000 1.000 -20.010 -22.010 Normal
=============|=================================================================
display interface <interface-name>
Sample Output:
<Huawei-Router1>display interface 400GE1/0/0
400GE1/0/0 current state : UP (ifindex: 169)
Line protocol current state : DOWN
Link quality grade : GOOD
Description: Connection to Huawei-Router2
Route Port,The Maximum Transmit Unit is 1500
Internet protocol processing : disabled
IP Sending Frames’ Format is PKTFMT_ETHNT_2, Hardware address is 78ab-1234-abcd
Factor/Module: QSFP-DD, Standard: 400ZR Single Wavelength, FecMode: Standard
The Vendor PN is CTR-D2F5C-B
The Vendor Name is HG GENUINE
Port BW: 400G, Transceiver max BW: 400G, Transceiver Mode: SingleMode
Connector Type: LC, Transmission Distance: 80km
WaveLength: 1547.70nm
Chromatic Dispersion: 1000ps/nm, Polarization Mode Dispersion: 0.000ps
Rx Power Total: -12.550dBm, Warning range: [-20.010, 1.000]dBm
Rx Optical Power: -12.644dBm, Warning range: [-20.010, 1.000]dBm
Tx Optical Power: 3.993dBm, Warning range: [2.000, 6.000]dBm
Loopback: none, FLEXE full-duplex mode
Local fault: normal, Remote fault: normal.
Last physical up time : 2025-09-11 11:59:52+08:00
Last physical down time : 2025-09-11 11:59:27+08:00
Current system time: 2025-09-22 13:14:23+08:00
Statistics last cleared:never
Last 300 seconds input rate: 1289 bits/sec, 1 packets/sec
Last 300 seconds output rate: 1154 bits/sec, 1 packets/sec
Input peak rate 367571 bits/sec, Record time: 2025-08-11 22:25:18+08:00
Output peak rate 38810 bits/sec, Record time: 2025-07-21 10:53:26+08:00
Input: 884874342 bytes, 9395581 packets
Output: 740923084 bytes, 9033194 packets
Input:
Unicast: 6710506 packets, Multicast: 868478 packets
Broadcast: 1816597 packets, JumboOctets: 64 packets
CRC: 0 packets, Symbol: 0 packets
Overrun: 0 packets, InRangeLength: 0 packets
LongPacket: 0 packets, Jabber: 0 packets, Alignment: 0 packets
Fragment: 0 packets, Undersized Frame: 0 packets
RxPause: 0 packets
Output:
Unicast: 6357053 packets, Multicast: 859681 packets
Broadcast: 1816460 packets, JumboOctets: 29934 packets
Lost: 0 packets, Overflow: 0 packets, Underrun: 0 packets
System: 0 packets, Overruns: 0 packets
TxPause: 0 packets
Last 300 seconds input utility rate: 0.01%
Last 300 seconds output utility rate: 0.01%
display interface <interface-name> extensive
Sample Output:
<Huawei-Router1>display interface 400GE1/0/0 extensive
400GE1/0/0 current state : UP (ifindex: 169)
Line protocol current state : DOWN
Link quality grade : GOOD
Description: Connection to Huawei-Router2
Route Port,The Maximum Transmit Unit is 1500
Internet protocol processing : disabled
IP Sending Frames’ Format is PKTFMT_ETHNT_2, Hardware address is 78ab-1234-abcd
Factor/Module: QSFP-DD, Standard: 400ZR Single Wavelength, FecMode: Standard
The Vendor PN is CTR-D2F5C-B
The Vendor Name is HG GENUINE
Port BW: 400G, Transceiver max BW: 400G, Transceiver Mode: SingleMode
Connector Type: LC, Transmission Distance: 80km
WaveLength: 1547.70nm
Chromatic Dispersion: 1000ps/nm, Polarization Mode Dispersion: 0.000ps
Rx Power Total: -12.540dBm, Warning range: [-20.010, 1.000]dBm
Rx Optical Power: -12.580dBm, Warning range: [-20.010, 1.000]dBm
Tx Optical Power: 4.002dBm, Warning range: [2.000, 6.000]dBm
Loopback: none, FLEXE full-duplex mode
Local fault: normal, Remote fault: normal.
Last physical up time : 2025-09-11 11:59:52+08:00
Last physical down time : 2025-09-11 11:59:27+08:00
Current system time: 2025-09-22 14:12:08+08:00
Statistics last cleared:never
Last 300 seconds input rate: 1307 bits/sec, 1 packets/sec
Last 300 seconds output rate: 1171 bits/sec, 1 packets/sec
Input peak rate 367571 bits/sec, Record time: 2025-08-11 22:25:18+08:00
Output peak rate 38810 bits/sec, Record time: 2025-07-21 10:53:26+08:00
Last 300 seconds input peak rate: 1409 bits/sec
Last 300 seconds output peak rate: 1202 bits/sec
Input: 885381176 bytes, 9401676 packets
Output: 741359596 bytes, 9038871 packets
Input:
Unicast: 6714897 packets, Multicast: 869025 packets
Broadcast: 1817751 packets, JumboOctets: 64 packets
CRC: 0 packets, Symbol: 0 packets
Overrun: 0 packets, InRangeLength: 0 packets
LongPacket: 0 packets, Jabber: 0 packets, Alignment: 0 packets
Fragment: 0 packets, Undersized Frame: 0 packets
RxPause: 0 packets
Output:
Unicast: 6361030 packets, Multicast: 860223 packets
Broadcast: 1817615 packets, JumboOctets: 29934 packets
Lost: 0 packets, Overflow: 0 packets, Underrun: 0 packets
System: 0 packets, Overruns: 0 packets
TxPause: 0 packets
Last 300 seconds input utility rate: 0.01%
Last 300 seconds output utility rate: 0.01%Qos car:
Ingress discard packets: 0 packets
Egress discard packets: 0 packets
Port-queue:
Egress discard packets: 0 packets
Arp vlan car:
Ingress discard packets: 0 packets
Port packets:
Receive packets equal to 64 bytes: 6718488 packets
Receive packets 65~127 bytes: 1744396 packets
Receive packets 128~255 bytes: 633399 packets
Receive packets 256~511 bytes: 222618 packets
Receive packets 512~1023 bytes: 18005 packets
Receive packets 1024~1518 bytes: 64706 packets
Receive packets more than 1518 bytes: 64 packets
Send packets equal to 64 bytes: 7017834 packets
Send packets 65~127 bytes: 1748310 packets
Send packets 128~255 bytes: 20822 packets
Send packets 256~511 bytes: 213771 packets
Send packets 512~1023 bytes: 6933 packets
Send packets 1024~1518 bytes: 1267 packets
Send packets more than 1518 bytes: 29934 packets
FEC Error Counter:
FEC 0 error: 13096
FEC 1 error: 426080
FEC 0 and 1 type error: 439176
FEC symbol error: 439187
FEC uncorrected error: 0
FEC error rate: 0x01c1000c(4.49E-12)
Optical DWDM Information:
Chromatic Dispersion: 1000ps/nm
Polarization Mode Dispersion: 0.000ps
FEC 0 and 1 type error: 333620677304752
FEC uncorrected error: 114002281748180
OSNR: 32.3dB
BER: 1.40E-4
Q Factor: 11.21dB
Be First to Comment