From owner-freebsd-current@freebsd.org Sun Jun 3 17:33:45 2018 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F0505FE379A for ; Sun, 3 Jun 2018 17:33:44 +0000 (UTC) (envelope-from cmt@burggraben.net) Received: from smtp.burggraben.net (smtp.burggraben.net [IPv6:2a01:4f8:140:50a2::3:1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "ns.exwg.net", Issuer "Christoph Moench-Tegeder" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 8BE1670DFE for ; Sun, 3 Jun 2018 17:33:44 +0000 (UTC) (envelope-from cmt@burggraben.net) Received: from localhost (localhost [127.0.0.1]) by smtp.burggraben.net (Postfix) with ESMTP id 482DA6002F3 for ; Sun, 3 Jun 2018 19:33:42 +0200 (CEST) X-Spam-Scanned: by amavisd-new at exwg.net Received: from smtp.burggraben.net ([127.0.0.1]) by localhost (ns.burggraben.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id aX7IQe-k1tZT for ; Sun, 3 Jun 2018 19:33:31 +0200 (CEST) Received: from squirrel.exwg.net (unknown [145.253.109.162]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "squirrel.exwg.net", Issuer "Christoph Moench-Tegeder" (verified OK)) by smtp.burggraben.net (Postfix) with ESMTPS for ; Sun, 3 Jun 2018 19:33:31 +0200 (CEST) Received: by squirrel.exwg.net (Postfix, from userid 1000) id AE4F92C29EA; Sun, 3 Jun 2018 19:33:30 +0200 (CEST) Date: Sun, 3 Jun 2018 19:33:30 +0200 From: Christoph Moench-Tegeder To: freebsd-current@freebsd.org Subject: Re: Can't seem to use 5GHz APs with Intel wireless Message-ID: <20180603173330.p6h7x6vznzxwbqmp@squirrel.exwg.net> References: <20180601091031.72u7tqfkatsl3guh@kazhap> <20180601223711.GA93642@elch.exwg.net> <20180603145342.qziiv7awhr4cvs73@kazhap> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20180603145342.qziiv7awhr4cvs73@kazhap> User-Agent: NeoMutt/20170113 (1.7.2) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Jun 2018 17:33:45 -0000 ## Dhananjay Balan (mail@dbalan.in): > On Sat, Jun 02, 2018 at 12:37:12AM +0200, Christoph Moench-Tegeder wrote: > > Did you try adding "mode 11a" to select 5GHz band? (This might be > > out-of-date, as my WiFi stuff is all on 11) (currently I'm also > > using 2.4GHz only, for compatibility with some devices and the fact > > that I have quite some trouble running 2.4GHz and 5GHz from the same > > interface at the same time). > > I did a bit more testing, I have to admit that I am not well versed in > wifi internals. Here's the non-technical overview: https://en.wikipedia.org/wiki/IEEE_802.11 (The real details can be really gory, but this should be good enough). > 1. ifconfig wlan0 list aps shows my aps having rate 54M (Im not entirely > sure what this means). > But however when I connect to it, it shows up as 11g A data rate of 54 MBit/s would be perfectly in sync with 11g - 20MHz channel width, OFDM modulation, 2.4 GHz. And we see that in this line: > ssid LA03 channel 6 (2437 MHz 11g ht/20) bssid 52:d9:e7:47:c0:c2 And this shows that even MIMO ("Multiple Input, Multiple Output" has been activated (that's the "n" in "11ng"): > media: IEEE 802.11 Wireless Ethernet MCS mode 11ng The 5GHz part of 802.11 is 802.11a (and related, like ac), there's no 5GHz band in 11g. I'm a little puzzled about this: > regdomain FCC4 country DE authmode WPA2/802.11i privacy ON Is the regdomain/country setting correct for your area and matches your AP? Especially in the 5GHz band there are some "gaps" - not all channels may be used in all countries (because of possible interference with radar equipment and other stuff). See: https://en.wikipedia.org/wiki/List_of_WLAN_channels#5_GHz_(802.11a/h/j/n/ac/ax) Regards, Christoph -- Spare Space.