Environment : This article applies to Aruba Instant Access Points running Aruba InstantOS 220.127.116.11-18.104.22.168 or higher and managed by Aruba Central.
IT administration requires greater visibility into the types of devices connecting to network to control the network and bandwidth.
Device Type with "Unknown" are the wireless clients that are associated but did not pass any HTTP traffic for the Instant AP to identify the OS.
The Clients page also displays the PIE graph showing different Device Types and their count irrespective of the SSID they are connected to. Below figure shows a PIE graph: