Re: Get multiple ip addresses by dhcp for wireless card

[Ben Greear <greearb@candelatech.com>]

On 02/10/2014 12:38 AM, Zhao Hongjiang wrote:
> On 2014/2/10 14:47, Ben Greear wrote:
>> On 02/09/2014 07:56 PM, Zhao Hongjiang wrote:
>>> Hello,
>>>
>>> Is it possible for one station to get multiple ip addresses from AP/Wireless
>>> router by dhcp? I had tried to add one or more virtual interface for
>>> phy0 (wlan0, wlan1, wlan2,etc), but only wlan0 can get ip address from AP.
>>> the following is the steps:
>>>
>>> /bin/wpa_supplicant -ddd -iwlan0 -Dnl80211 -c/wifi/wpa_supplicant.conf -B
>>> /bin/wpa_cli -i wlan0 -p /wlan0
>>>> add_network
>>>> set_network 0 ssid "APabc"
>>>> set_network 0 psk "1111111"
>>>> enable_network 0
>>>
>>> iw wlan0 interface add wlan1 type station 4addr on
>>> ip link set wlan1 up
>>> dhcpcd -ABKL wlan0 #works, can get ip
>>> dhcpcd -ABKL wlan1 #cannot work
>>
>> Virtual stations work just fine for me, though I don't use that '4addr' thing.
>> ...maybe sniff your wlan1 and see if it is sending
>> out proper DHCP requests (and they are being received by the AP)?
>>
>> You have to create a new supplicant config for each virtual station,
>> or run a unique supplicant instance for each station.
> 
> I try to follow the instruction which you give and do the following command, but wlan1 
> cannot associate with AP.

What driver are you using?  I'm not sure anything other than ath9k
can do this feature.  Ath5k probably works, and definitely worked
at one time.  Ath10k supports this to some degree, and will have more
support in the future.

You typically have to disable hardware crypt to make this work.

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com