What are the pre-requisites for enabling SLB in Aruba Instant? What are the ways to confirm that SLB is enabled?

Aruba Employee
Aruba Employee

Environment : This article applies to all Aruba Instant Access Points running Aruba InstantOS or higher.



Spectrum Load Balnalcing (SLB) feature helps optimize network resources by balancing client load across channels and by dividing APs in a cluster into several logical AP RF neighborhood domains.

For SLB to function in a instant cluster, the Adaptive Radio Management (ARM) must be enabled as its load balancing forces the client to a ‘better’ channel using standard association response frames thereby seeking to equalize the number of clients on each available channel.



Note: Also note that SLB feature is in action only when a client first connects onto the network. There is no dynamic load-balancing once the client is already associated to an AP.

By default Spectrum Load Balancing is enabled on IAP. However, follow below steps to enable:

From GUI:

  1. Login to web interface of IAP 
  2. In the top-right menu, clicn on "RF"
  3. From the dropdown, select "Enabled" for Spectrum Load Balancing
  4. For further configuration parameters related to SLB, click on "Show Advance Options"
  5. Here, SLB calculating intervalSLB neighbor matching % and SLB Threshold can be configured.
  6. Once finish, click OK.
Below is the screenshot from GUI:


Below commands would help to verify if the SLB is enabled on the Instant AP:

# show arm config

rtaImage (1).jpg

# show running-config

(If SLB is enabled then the ARM section of running-config should show the entry for "spectrum-load-balancing")

rtaImage (2).jpg

# show ap debug spectrum-load-balancing x

(Where, x stands for radio: 0 or 1.  0 is for 5.GHz and 1 is for 2.4GHz)

This command is radio specific and shows if the SLB is enabled and active on a particular radio.

IAP# show ap debug spectrum-load-balancing 0
Spectrum Load Balancing Status: RUNNING, Associated:1, Threshold:5   
Spectrum Load Balancing Neighbor Table
MAC                     Channel   Client_Count   Flags        Recved_Seconds
---                             -------     ------------      -----          --------------
00:24:6c:07:b2:60  48             0                     VR               85
00:24:6c:24:24:50  165           3                     VR               136
00:24:6c:33:06:00  165           9                     V                  281
00:24:6c:24:17:60  161           0                                         2180
00:24:6c:07:7e:80  36             0                     S                  296
Neighbor Flags: V - Valid; R - Is in Virtual RF Neighborhood; S - Same Channel


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‎06-28-2014 05:51 AM
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