<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span></span></div><div><br></div> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> ----- Forwarded Message -----<br> <b><span style="font-weight: bold;">From:</span></b> RAVIKANT PATEL <ravikant_patel182000@yahoo.com><br> <b><span style="font-weight: bold;">To:</span></b> "mykyta.iziumtsev@gmail.com" <mykyta.iziumtsev@gmail.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, February 15, 2013 6:52 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Fw: hostapd related error<br> </font> </div> <br>
<div id="yiv501977162"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div id="yiv501977162"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>Hello,<br><br>That question is already answered by Jouni.<br><br>Copying from your previous conversation with him:<br> in our iw list<br> 2467 mhz [12] (16.0 dbm)(passive scanning)<br> 2472 mhz [13] (16.0 dbm)(passive scanning)<br><br>You can see that channels 12 and 13 are marked as "passive
scanning".<br>Hostapd can't operate on
channel which is marked "DFS required",<br>"passive scanning" or "IBSS prohibited".<br>Check hostapd_get_hw_features() for this code.<br><br>I would suggest you to take a look at your WLAN driver, and find out why those<br>channels are marked as "passive scanning".<br><br>P.S: I hope you have strong reason to put AP on channel 12. Good
practice is to<br>put APs on channels 1, 6 and 11. In that way they won't interfere with<br>each other.<br>Otherwise you're introducing interference which is impossible to avoid,<br>because WLAN CS function (on 2.4GHz, unless CS energy sense is ON,<br>which is unlikely)<br>looks only for a valid preamble, and for sure you can't decode OFDM<br>preamble from channel 12<br>when you're tuned to channel 11.<br><br>/Mykyta</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px;
font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">i understand what you want to say but i have question that <br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">->can i changes in drivers or anything so that i remove that passive scanning & set my channel as 12</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">please suggest me for that</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">my drivers</div><div
style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">ath9k</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">ath9k_common</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">ath9k_hw</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">ath</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style:
normal;">my hardware</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">DNXA-97(AR5B97)<br></div></div></div></div><br><br>as our linux wireless documet said<br><br>if your device was programmed for operation in the US which allows
operation on channels 1-11 on the 2.4 GHz band and you visit Japan which
allows operation on channels 1-14 and you change your regulatory domain
to JP you will not be able to use channel 12, 13 or 14 (CCK). But if
you have a device programmed for operation in Japan and visit the US and
you select US as your regulatory domain you will have channel 12-14
disabled. <br><br>as above discription if you go from U.S to JAPAN ,can't access channel 12,13 & 14 ,but device programed for japan we used channel 12-14 <br>,& then you go japan to U.S 12-14 channel will be disabled<br><br>can you suggest me that i set my regulatory domain as japan at the boot time so that i enabled my channel no 12 & 13 as said below(linux-wireless document)<br><br>if
you have a device programmed for operation in Japan and visit the US and
you select US as your regulatory domain you will have channel 12-14
disabled<br> </div> </div> </div></div></div><br><br> </div> </div> </div></body></html>