Degraded Wi-Fi throughput and Video Streaming issue on Apple devices running ios 6.
Apple devices (around 100 users) running ios 6 having problem with streaming video like youtube. The problem is it won't play the video at all, and will either just have a spinning loading icon or "play button" icon crossed out. Tested the same iphone device with home router and it works fine. Also tested ipad2 with ios5, Macbooks and windows laptops which works fine.
Is their any known issues with streaming video to apple devices on ios 6?
WLC 5508 version 7.3
Mix of 3502, 3602, 1142 APs. 50 APs deployed around internal LAN on campus.
Disabling video CAC fixed the video streaming problem for ios 6 devices.
CSCud67358 - Degraded Wi-Fi throughput w/ Apple iOS6 clients w/ 11n/CAC during BA neg
Apple clients running iOS 6.0.1 may experience degraded throughput when attempting to download media rich content such as video.
Apple clients running iOS 5.x or earlier do not experience the issue under identical conditions.Apple support has observed and analyzed the issue, and has confirmed non compliant CAC behavior with iOS 6.0.1 software.Apple intends to correct the issue in forthcoming firmware updates.This release note will be updated with code fix specifics when available.Conditions:
Apple iOS 6.0.1 client connected to Unified Access Point at 802.11N data rates with Video Call Admission Control (CAC) enabled.Workaround:
Disable 802.11N support or disable Video Call Admission Control (CAC).
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