What is SLB threshold in Aruba Instant? How to configure and verify? What is the range that can be configured and its significance?

Aruba Employee
Aruba Employee

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



SLB Threshold is a configuration parameter under Spectrum Load Balancing (SLB) functionality. The value specified for SLB threshold indicates the number of clients on a channel. When the client load for an Instant AP reaches or exceeds the specified threshold, load balancing is enabled on the AP.

The default value is 2. You can specify a value within range of 1-20.

One significant point to note is that, Spectrum Load Balancing 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. Having said this, the lower the value for "SLB Threshold" the earlier the SLB gets triggered and starts balancing clients among APs of same virtual RF neighborhood.

Below are the steps to configure "SLB Threshold" 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 GUI screenshot from reference:


Below screenshots shows how to verify from GUI and CLI:

From GUI:
  1. Login to web interface of IAP 
  2. In the top-right menu, Point to "More"
  3. From the dropdown, select "Support"
  4. From the "Command" dropdown, select "AP ARM Configuration"
  5. The "Target" dropdown, shows the list of Instant AP's in the cluster and thereby one can select the AP that the command has to run. Here, select the access point that has "(VC)" beside it. This Instant AP is the Virtial Controller for the cluster.
  6. Click on "Run" button.


rtaImage (1).jpg

From CLI:

SSH or Console, into Virtual Controller and execute the below command:

# show arm config

rtaImage (2).jpg




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Last update:
‎06-28-2014 04:58 AM
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