Alarm threshold modification for E4 and E5 series OA boards

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1. Run the following command to query the alarm thresholds. Pay attention that the board slot ID must be replaced with the actual slot ID and the slot ID must be in decimal format.
:cfg-get-almth:5,1,1,sumiop
PER-ALM-TH
BID PORT PATH TH-TYPE TH-HIGH TH-LOW
5 1 1 sumiop 10 -320
Total records :1
2. Run the following nptp command to query the alarm thresholds on the board side. Pay attention that the board slot ID must be replaced with the actual slot ID and the slot ID must be in hexadecimal format.
In the command outputs, TH-HIGH indicates the upper threshold in decimal format and TH-LOW indicates the lower threshold in hexadecimal format. After the lower threshold in hexadecimal format is converted into a value in decimal format, the lower threshold must correspond to the threshold queried in step 1.
:nptp:5,13,31,1,0,1,0,94
ncmd 0: 05 13 31 00 00 01 00 01 00 94 00 00 00 0a ff ff fe c0
In the command outputs, 00 00 00 0a is the upper threshold and ff ff fe c0 is the lower threshold.
3. Run the following nptp command to query the alarm thresholds on the board side. Pay attention that the board slot ID must be replaced with the actual slot ID and the slot ID must be in hexadecimal format.
The upper threshold is 0x12 in hexadecimal format, which is 18 in decimal format. That is, the upper threshold is 1.8 dB.

:nptp:$bid,13,30,1,0,1,0,94,0,0,0,12,ff,ff,fe,c0
ncmd 0: 05 13 30 00 00
In the command outputs, 00 00 00 12 is the upper threshold and ff ff fe c0 is the lower threshold.
4. Query the alarm threshold again to check whether the alarm threshold is successfully modified.
:cfg-get-almth:5,1,1,sumiop
PER-ALM-TH
BID PORT PATH TH-TYPE TH-HIGH TH-LOW
5 1 1 sumiop 18 -320
Total records :1
5. Replace the nptp command in step 2 with the sptp command and then deliver the command again without changing other parameters. In this manner, the command is saved to the NE software and will not be lost during a board reset.
:sptp:5,13,30,1,0,1,0,94,0,0,0,12,ff,ff,fe,c0

Other related questions:
Possible causes of a power threshold-crossing alarm on an OA board
The possible causes are as follows: 1. If the upstream board outputs optical power at a normal level but the local board receives excessively high optical power, the cause may be that no appropriate attenuator is added. 2. The peer board or the upstream board outputs excessively high optical power. 3. The board at the local station is faulty.

Differences of the MUT_LOS and R_LOS alarms on OA boards of WDM devices
Question: On Huawei WDM devices, why some OA boards report the R_LOS alarm whereas some OA boards report the MUT_LOS alarm when they do not receive any light or the receive optical power is excessively low? Analysis: None Answer: When the OA boards (such as WPA, WBA, and WLA) on 320G devices do not receive any optical signals, the R_LOS alarm is reported. When the OA boards (such as OPU, OBU, and OAU) on 1600G, 800G, and 400G devices do not receive any optical signals, the MUT_LOS alarm is reported. Suggestion and conclusion: The R_LOS alarm is used to indicate the loss of input optical signals on a single wavelength of a board such as OTU. The MUT_LOS alarm is used to indicate the loss of multiplexed optical signals on a board such as M40, D40, OAU, OBU, or OPU. It is inaccurate that the R_LOS alarm is reported when OA boards do not receive any optical signals. Therefore, the R_LOS alarm is canceled for new OA boards. When developing new 1600G, 800G, and 400G WDM systems, Huawei adjusts the alarm that is reported when OA boards do not receive any optical signals. To be specific, the OA boards report the MUT_LOS alarm when receiving no optical signals.

Method used to query the gain of an OA board
In the NE Explorer of the U2000, choose Configuration > WDM Interface. Then query or set the value of the Nominal Gain parameter.

Reason for VOADATA_MIS alarm reporting and VOA value downloading failure during OA board replacement
OA boards are equipped with EVOAs that support different minimum values ranging from 0.5 dB to 1.5 dB. For example, if the EVOA of an OAU board is set to 0.5 dB, after the board is faulty and is replaced by a board whose minimum EVOA value is 0.6 dB, the VOADATA_MIS alarm is reported, the VOA value fails to be downloaded, and the default value 21.5 dB is restored. To avoid this, record the EVOA, gain, and output optical power values of the faulty board before board replacement. If the VOADATA_MIS alarm is reported during the replacement, manually adjust the EVOA and gain values of the new board to ensure that the output optical power of the new board is the same as that before the replacement. If the board does not report the VOADATA_MIS alarm, you do not need to adjust the board settings.

Default temperature alarm thresholds of the ND2 board on OSN 6800 devices
By default, the lower and upper temperature alarm thresholds are 0°C and 65°C respectively. In V100R006 and later versions, the lower and upper temperature alarm thresholds are 0°C and 80°C respectively. To query the temperature alarm thresholds, run the :cfg-get-bdtempth:Bid; command.

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