Answer- Product & Software: This article applies for Aruba OS 6.x and above.
RADIUS server can be configured to send user disconnect, change-of-authorization (CoA), and session timeout messages as described in RFC 3576.
For Campus AP, RADIUS CoA is supported on tunnel and decrypt-tunnel forwarding modes only.
For Remote AP, RADIUS CoA is supported on tunnel and split-tunnel forwarding modes only.
RADIUS CoA is not supported in the bridge forwarding mode.