On Thursday 26 December 2013 10:27:30 Giancarlo Razzolini wrote: > Em 26-12-2013 00:25, electronmuontau neutrino escreveu: > >> Sorry for late answer - had some problems with my ISP. > >> > >> On Sunday 22 December 2013 01:42:09 electronmuontau neutrino wrote: > >>> I have two machines configured as wifi access points that use > >>> the > >>> athn(4) driver. One is an Acer Aspire One D250 and the other is > >>> an > >>> ALIX.2D13 with a Compex WLM200NX Atheros 802.11 a/b/g/n miniPCI > >>> card. Both have OpenBSD 5.4 release installed. I've been able > >>> to > >>> reproduce the problem reliably on both. The following is one > >>> procedure I used to test the problem: > >>> > >>> -boot machine with athn down > >>> > >>> $ ifconfig athn0 > >>> athn0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500 > >>> > >>> lladdr: xx:xx:xx:xx:xx:xx > >>> priority: 4 > >>> groups: wlan > >>> media: IEEE802.11 autoselect > >>> status: no network > >>> ieee80211: nwid "" > >>> > >>> $ sudo ifconfig athn0 inet 192.168.2.1 255.255.255.0 nwid > >>> > >>> 1234567890 wpakey keykeykey mediaopt hostap > >>> > >>> $ ifconfig athn0 > >>> athn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> > >>> mtu > >>> > >>> 1500 lladdr: xx:xx:xx:xx:xx:xx > >>> > >>> priority: 4 > >>> groups: wlan > >>> media: IEEE802.11 autoselect (autoselect hostap) > >>> status: active > >>> > >>> ieee80211: nwid 1234567890 chan 3 bssid xx:xx:xx:xx:xx:x: > >>> wpakey <not displayed> wpaprotos wpa1, wpa2 wpaakms psk > >>> wpaciphers > >>> tkip, ccmp wpagroupcipher tkip > >>> > >>> inet 192.168.2.1 netmask 0xffffff00 broadcast > >>> 192.168.2.255 > >>> inet6 xxxx::xxx:xxxx:xxxx:xxxx%athn0 pfrefixlen 64 > >>> scopeid > >>> > >>> 0x1 > >>> > >>> -edit dhcpd.conf and run dhcpd daemon > >>> > >>> $ sudo /usr/sbin/dhcpd athn0 > >>> > >>> -attempt to associate from MacOSX and WinXP machines > >>> > >>> -not able to see nwid on WinXP after refreshing list > >>> multiple > >>> > >>> times -can see nwid on MacOSX, but connection times out when > >>> trying > >>> to associate > >> > >> Down to here you are sending on 5120MHz, right? > > > > I don't know. How would you determine that? > > > >>> -change channel on access point > >>> > >>> $ sudo ifconfig athn0 chan 7 > >> > >> Now you switch to 2.4GHz - right? > >> > >>> -association with AP is successful from MacOSX and WinXP > >>> machines > >>> now and IP addresses are assigned > >> > >> WinXP machine might not work with 5GHz? > >> > >> Are the antennas suitable for 5GHz? What about signal strength? > >> On the MAC it might be useful to install a WiFi scanner which > >> will > >> tell you all about signal strength. > >> There is a free program called "Wifi Scanner" in the AppleStore. > >> It is very useful. > > > > The antennas I used were from PCEngines - listed as antsma on > > their website. antsma - Antenna for 2.4 GHz band, 5 dBi nominal > > gain. Reverse SMA connector. > > > > They do have another antenna, antsmadb, that is dual band which I > > don't have. antsmadb - Antenna for 2.4 GHz and 5 GHz band, 5 dBi > > peak gain in 2.4 GHz band. Reverse SMA connector. > > > > I don't think signal strength was an issue because I tested with > > each AP next to the Mac and Windows machines and still had the > > same result.> > >> I can't help with the COMPEX miniPCI 'cause I got another brand > >> on my Alix 2D13. But I realized that signal strength with 5GHz > >> can be significantly lower than with 2.4GHz using antennas which > >> are meant to work on both bands. > >> > >> Just my 2 c > >> > >>> Acer Aspire One D250 > >>> athn0 at pci1 dev 0 function 0 "Atheros AR9281" rev 0x01: apic 4 > >>> int 16 athn0: AR9280 rev 2 (2T2R), ROM rev 22, address > >>> xx:xx:xx:xx:xx:xx > >>> > >>> Alix 2D13 > >>> athn0 at pci0 dev 12 function 0 "Atheros AR9280" rev 0x01: irq 9 > >>> athn0: AR9280 rev 2 (2T2R), ROM rev 22, address > >>> xx:xx:xx:xx:xx:xx > >> > >> Some might like to see a complete dmesg of this setup [hint-hint] > >> > >>> Has anyone else encountered this? Please let me know if more > >>> info > >>> is needed. > >> > >> Cheers > >> Eike > > I might be wrong, and the code might disprove me, but I don't > believe that in hostap mode it can work without explicitly defining > a channel, which is the issue you are having. I used to have a > ralink 2500 in hostap mode, and it wouldn't work until I defined > the channel. You should do a site survey and see the least busy > channel in your area and set it on your hostname.if. I didn't check the code yet but my Wistron CM9 definitely works without defining a channel explicitly when setup as host AP. It starts using channel 36 if nothing is declared. Also it is visible in the spectrum using channel 36. Only defining any of channels 1 to 11 gives: "ifconfig: SIOCS80211CHANNEL: Invalid argument" while the MiniPCI card is supposed to be tri-band. But I don't want to hijack this thread with my own problem.
So I think that it uses the lowest available channel if nothing is declared in hostname.if or with ifconfig. Cheers Eike
