On Mon, Jan 09, 2017 at 02:10:51PM +0100, Thomas Graf wrote: > I tracked down the issue to lost EAPOL packets. I'm using the ath9k driver > which is repeating packets 10 times. The problem is when they are lost. Are you saying that you have an environment where 10 retries of a single EAPOL frame is not sufficient to get it through in significant number of cases? That sounds quite extreme environment.. Would you be able to share a wireless sniffer capture showing that type of case with connection failing? > On a previous proprietary platform the usual way was to flag EAPOL packets > for more retries and the wpa-supplicant was notified of unsuccessful > transmission. The IEEE 802.1X Authenticator on the AP is expected to retry EAPOL frames that do not get a response. Are you seeing that happening? And the same issue with following 10 retries from the station are all lost again? That would sound like a really horrible radio environment to the point of being useless in practice. Or there is something else causing connection issues.. > On linux with wpa_supplicant I only see long timeouts after lost EAPOL > frames. I suppose in mac80211 there should be some extended handling for > EAPOL frames. > Always waiting for the timeout and then restarting from the beginning is not > a good solution. So is this a completely failure to connect or just something that takes a long time because of the Authenticator retries being after couple of seconds? > On a channel on 2.4Ghz I see a typical channel usage of 50% or more. That > causes the authentication to fail of lost packets of about 10% in my > environment. 10% frame (MPDU) loss is fine and common, but that should not cause loss of the actual Data frame due to link layer retries and adjusted TX rate, if needed, when not in sufficient range of the AP to be able to use a higher rate that might have been tried first. -- Jouni Malinen PGP id EFC895FA _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
