Product and Software: This article applies to all ArubaOS controller running 3.3.2.x and higher.
The ArubaOS 'mobility' feature allows clients to roam across different subnets across controllers. Mobility detects a 'client move' when it receives a data packet (for example, layer2 ARP or layer3 packet) from a client.
When the 'ip mobile proxy on-association' feature is enabled, it allows mobility to detect client move as soon a client associates to another AP. This ability is mostly useful when a client makes a silent move, that is, after a client associates to another AP and goes to power-save mode. This behavior is prevalent in bar code scanners or other handheld devices like vo-wifi (voice over wifi) devices.
Configuration Using the CLI
(SDM3) #configure t
Enter Configuration commands, one per line. End with CNTL/Z
(SDM3) (config) #ip mobile proxy on-association
Configuration Using the WebUI
1) Browse to Configuration > Advanced Services > IP Mobility > Global Parameter.
2) Under Proxy Mobile IP, check the Trigger Mobility on Station Association option, as shown here.