Perhaps for this patch we can modify it so that the supplicant chooses over-the-DS if the AP advertises support for it, and over-the-air in all other cases. Further investigation can be done to determine if there is an algorithmic way of determining the best FT roam mechanism from within the supplicant, and a separate patch can be created at that time. Agreed? Regards, Jasraj -----Original Message----- From: Hostap [mailto:hostap-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Dennis Bland Sent: April-13-19 11:12 AM To: Jouni Malinen Cc: hostap@xxxxxxxxxxxxxxxxxxx Subject: Re: [PATCH] FT: Add FT over-the-DS selection for SME based drivers That's a good question. In our testing, we see a larger performance variation with FT over-the-DS (as it is more dependent on the underlying wired infrastructure), than with FT over-the-air. This often results in FT over-the-DS having a slower average roam time than FT over-the-air. However, FT over-the-DS can be faster than FT over-the-air with a well-designed wired infrastructure or when RF congestion is a problem, as the authentication frames do not need to be transmitted over-the-air. On Sat, Apr 13, 2019 at 10:26 AM Jouni Malinen <j@xxxxx> wrote: > > On Sat, Apr 13, 2019 at 09:24:47AM -0600, Dennis Bland wrote: > > Some implementations (e.g. mobile IoT Wi-Fi) prefer FT over-the-DS for > > the reasons you mentioned above, if the AP advertises support for it. > > Is there another way for wpa_supplicant to autonomously select FT > > over-the-DS, if supported by the AP? > > My main question on this patch is whether that should indeed be done by > default instead of adding this configuration parameter to do that > conditionally. Over-the-DS case is not currently used unless explicitly > requested for a particular roam, but if there is agreement on it being > better for all cases, it should be used by default if supported by the > AP. > > -- > Jouni Malinen PGP id EFC895FA _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
