Here's the excerpt from the wpa_supplicant documentation: freq_list: Array of allowed frequencies Space-separated list of frequencies in MHz to allow for selecting the BSS. If set, scan results that do not match any of the specified frequencies are not considered when selecting a BSS. This kinda implies that one can use it to force selection of the 5Ghz band. However, this doesn't work that way. Jouni Malinen said in 2014[1]: > freq_list affects only scanning. This does not prevent drivers from > roaming to other frequencies when BSS-selection is done by the driver > instead of wpa_supplicant. In other words, this is not a generic > solution for forcing 5 GHz band to be used. And, indeed, in my experience, it doesn't affect affect band selection _at all_. netplan developers were apparently also confused by wpa_supplicant documentation, as netplan docs are vaguely imply that their "band" settings (which translates to wpa_supplicant's "freq_list") can be used to to force band selection[2]. I raised an issue on the netplan bug tracker about it[3]. This begs two questions: 1) Maybe "freq_list" documentation needs to be clarified? Apparently, it has very limited and unclear use. 2) wpa_supplicant could use a working way to enforce band selection. There's clearly some need for it. [1] https://lists.infradead.org/pipermail/hostap/2014-August/030761.html [2] https://netplan.io/reference/#properties-for-device-type-wifis%3A [3] https://bugs.launchpad.net/netplan/+bug/1944044 _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
