tiny6410,2.6.38内核，安装了腾达的311MIminiUSB无线网卡，现在已经搜索到网络了，但是在配置网络参数的时候遇到很奇怪的问题
iwconfig命令配置参数无效，只能查询！更改mode参数为managed一直不成功，也不报错，其它所有参数都修改不了，ra0在up和down的情况下都尝试过。
[root@FriendlyARM RT2870STA]# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
ra0 Ralink STA ESSID:"cetc_903" Nickname:"RT2870STA"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Bit Rate:1 Mb/s
RTS thr:off Fragment thr:off
Encryption key:off
Link Quality=10/100 Signal level:-55 dBm Noise level:-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
[root@FriendlyARM RT2870STA]# iwconfig ra0 mode Managed
[root@FriendlyARM RT2870STA]# iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
ra0 Ralink STA ESSID:"cetc_903" Nickname:"RT2870STA"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Bit Rate:1 Mb/s
RTS thr:off Fragment thr:off
Encryption key:off
Link Quality=10/100 Signal level:-55 dBm Noise level:-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
[root@FriendlyARM RT2870STA]#
