It was reported that the power status of the NE80 at a site could not be viewed. The device powered by direct current ran normally. The power status of the device could not be identified remotely.
Version of the device: 8011V100R002B03D051SP02
1. Accessing the device through Telnet, the engineer found the power status was null:
<NE80_A>display power status?
<null> None of power and dpower is present!
2. Checking information about the device, the engineer found no power information:
NE80’s Device status:
Slot # Type Online Register Status Primary NET Port
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1 LPUB Present Registered Normal NA Open
2 LPUB Present Registered Normal NA Open
10 LPUF Present Registered Normal NA Open
17 MPU Present NA Normal Master NA
18 MPU Present NA Normal Slave NA
19 NET Present Registered Normal Master NA
20 NET Present Registered Normal Slave NA
21 CLK Present Registered Normal Master NA
22 CLK Present Registered Normal Slave NA
25 FAN Present Registered Normal NA NA
The front-line engineer was asked to check the device on the site. Then the engineer found that the NE80 was not powered by the power supply made by Huawei, but by the -48 V power in the customer’s power distribution room. That explained why the power status of the NE80 could not be monitored.
1. Because the device was powered by direct current, the fault was probably caused by the abnormal monitoring board. In this case, the abnormal board needed to be replaced with a new one.
2. Although the device ran normally, the fault may be caused by the power module itself since no one was present on the site.
Carefully check the site for troubleshooting the fault. In terms of the problem with the power, we tend to think it is caused by our own devices, and ignore the fact that the customers may use their own power supply.