why Apple devices have wifi problems on non-Apple APs
I’ve always suspected some bullshit like this — Apple devices (Macs and iPhones) expect a specific non-standard wifi setting. If you’ve noticed Apple devices falling off the network and taking a long time (many seconds) to rejoin, where devices with other OSes do not have the same problem, this may be the cause. tl;dr: the DTIM (delivery traffic indication message) setting, which defaults to 1 in a standards-compliant AP, is expected to be set to 3 by Apple devices, in order to improve battery life. Source: https://twitter.com/revolutionwifi/status/725489216768106496 (“Apple engineers have strongly suggested a DTIM of 3.”)
(tags: dtim wifi wireless 802.11 apple aps hardware networking)