Controller Based WLANs

How do I monitor and troubleshoot AP load balancing?

Product and Software: This article applies to all Aruba APs and ArubaOS 3.x.

 

When the threshold is reached (number of users or utilization on the radio), the following log message is generated:

(Aruba)# show log wireless x

Jun 1 13:12:40 :404041: <WARN> |AP TEST@192.168.0.234 sapd| AM 00:0b:86:31:8e:a0: Enabling Load Balancing on AP 00:0b:86:31:8e:a1 NU <high-water-mark or higher> (if it is number of users based)
Jun 1 13:12:40 :404041: <WARN> |AP TEST@192.168.0.234 sapd| AM 00:0b:86:31:8e:a0: Enabling Load Balancing on AP 00:0b:86:31:8e:a1 BWR <high-water-mark or higher> (if it is utilization based)


Then if you issue the 'show ap monitor ap-list' command, you see that load balancing is enabled for all APs that reached the hwm (high-water-mark), but it is disabled for all others:

(Aruba)# show ap monitor ap-list ap-name RAP2

Monitored AP Table
---------------------
bssid                          essid chan ap-type phy-type          dos         mt  it load-balance nstas avg-rssi curr-rssi wired-macs
---------------------------------------------------------------------------------- -------------------------------
00:0b:86:31:8e:a1      test    6         valid  80211b/g      disable   1527 0    enable      2     15       15        3

 

After load balancing is enabled for the AP (SSID), you continue to receive these log messages if you debug stm:

Jun 1 13:34:19 :501089: <NOTI> |stm| Probe request: 00:19:7d:1e:8a:b7: Dropped AP 192.168.0.234-00:0b:86:31:8e:a1-TEST for Load Balancing SSID test
Jun 1 13:34:19 :501109: <NOTI> |stm| Auth request: 00:19:7d:1e:8a:b7: AP 192.168.0.234-00:0b:86:31:8e:a1-RAP2 auth_alg 0
Jun 1 13:34:19 :501094: <NOTI> |stm| Auth failure: 00:19:7d:1e:8a:b7: AP 192.168.0.234-00:0b:86:31:8e:a1-TEST Reason AP is resource constrained

Also the 'show stm packets' command shows an "assoc-resp" with a resource constrained error code.

After the low water mark is reached, the following log message is generated:

(Aruba)# show log wireless all

Jun 1 13:38:09 :404039: <WARN> |AP TEST@192.168.0.234 sapd|AM 00:0b:86:31:8e:a0: Disabling Load Balancing on AP 00:0b:86:31:8e:a1 BWR X NU <low-water-mark or less> (if it is number of users based)
Jun 1 13:38:09 :404039: <WARN> |AP TEST@192.168.0.234 sapd| AM 00:0b:86:31:8e:a0: Disabling Load Balancing on AP 00:0b:86:31:8e:a1 BWR <low-water-mark or less> NU Y (if it is utilization based)

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Last update:
‎07-01-2014 01:54 PM
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