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Unable to view AP neighbors AC6005

Latest reply: Jan 20, 2022 17:14:00 586 2 1 0 0
Issue Description

Below is the output of “display AP all” to check if APs are working normally.

752 AP-752 ew-APGRP AP4030DN V200R007C20SPC300 normal 
753 AP-753 ew-APGRP AP4030DN V200R007C20SPC300 normal 
754 AP-754 ew-APGRP AP4030DN V200R007C20SPC300 normal 
755 AP-755 ew-APGRP AP4030DN V200R007C20SPC300 normal 
756 AP-756 ew-APGRP AP4030DN V200R007C20SPC300 normal 
757 AP-757 ew-APGRP AP4030DN V200R007C20SPC300 normal 
758 AP-758 ew-APGRP AP4030DN V200R007C20SPC300 normal 
759 AP-759 ew-APGRP AP4030DN V200R007C20SPC300 normal 
760 AP-760 ew-APGRP AP4030DN V200R007C20SPC300 normal 
761 AP-761 ew-APGRP AP4030DN V200R007C20SPC300 normal 
762 AP-762 ew-APGRP AP4030DN V200R007C20SPC300 normal 
763 AP-763 ew-APGRP AP4030DN V200R007C20SPC300 normal 
764 AP-764 ew-APGRP AP4030DN V200R007C20SPC200 normal 
765 AP-765 ew-APGRP AP4030DN V200R007C20SPC200 normal

This is the reference AP of which we want to see the APs:

<EW-MER-WLC-01>dis ap run-info ap-id 765
Info: Waiting for AP response.
--------------------------------------------------------------------------------
AP type : AP4030DN
Country code : NL
Software version : V200R007C20SPC200
Hardware version : Ver.B
BIOS version : 465
BOM version : 000
Memory size(MB) : 256
Flash size(MB) : 32
SD Card size(MB) : - 
Manufacture : Huawei Technologies Co., Ltd.
Software vendor : Huawei Technologies Co., Ltd.
Online time(ddd:hh:mm:ss) : 31M:55S
Run time(ddd:hh:mm:ss) : 33M:8S
IP address : 10.7.5.57
IP mask : 255.255.255.0
Gateway : 10.7.5.1
DNS server : 0.0.0.0
GigabitEthernet port 0
Port speed(Mbps) : 1000
Port speed mode : auto
Port duplex : full
Port duplex mode : auto
Port state : up
STP down recovery time(ddd:hh:mm:ss) : -

Alarm Information

After issuing command to display AP neighbors we noticed that it says that AP does not have neighbors

<EW-MER-WLC-01>dis ap neigh ap-id 765
Info: This operation may take a few seconds. Please wait for a moment.done.
Info: Radio does not have neighbors.

Handling Process

Checked configuration and noticed that we have set the calibration mode to scheduled:

wlan

ac protect enable protect-ac 10.7.1.102 priority 2

calibrate enable schedule time 00:00:00

calibrate sensitivity low


That means we can continue using schedule calibration but we will be able to see the neighbors only for short period of time. The command has a fixed time interval during it show the APs neighbors which is one hour. So in order to see the output of the command we have to do calibration and we will be able to see the output for one hour plus the interval when the calibration is done (around half an hour).


After this interval of 1.5 h the neighbor information will expire and until the next calibration we will see this output:

<EW-MER-WLC-01>dis ap neigh ap-id 765
Info: This operation may take a few seconds. Please wait for a moment.done.
Info: Radio does not have neighbors.

Root Cause

Scheduled calibration is enabled and the neighbors have an expiration time of 1.5h.

 Solution

In order to see the neighbors all the time we have to configure auto calibration and the output of the command will not expire, because the APs will report neighbor information for several time. 

calibrate sensitivity medium

undo calibrate auto-channel-select disable 

undo calibrate auto-txpower-select disable

calibrate enable auto interval 1440 start-time 03:00:00

Thank you.
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