Dear Sirs,

I have a pc with an Intel Card, Intel Corporation Centrino Advanced-N 6235 [8086:088e] (rev 24), driven by iwlwifi. I have installed the backports version of iwlwifi.

The card and the driver work flawlessly. I am having troubles, though, when I try two build two virtual interfaces on this card, one in Station mode and the other in AP mode.

The output of iw list states, among other things, that:

Supported interface modes:
│
* IBSS
* managed
* AP
* AP/VLAN
* monitor
* P2P-client
* P2P-GO
software interface modes (can always be added):
* AP/VLAN
* monitor
valid interface combinations:
* #{ managed } <= 1, #{ AP, P2P-GO } <= 1, total <= 2, #channels <= 1, STA/AP BI must
match
* #{ managed } <= 2, #{ P2P-client } <= 1, total <= 2, #channels <= 1

I have interpreted this to mean that I can put my card into AP mode (I did, it works). The "valid interface combinations" appeared to state (if I read them right) that I can have at most one vif in station mode, 1 vif in AP mode, for a grand total of two, provided that they are on the same channel, and provided that

STA/AP BI must match

What does this mean? I have been unable to find this on Google, and several posts at moderately knowledgeable BBs like SuperUser, StackOverflow and the like have provided no enlightenment.

Since clients connecting to my AP are so far unable to obtain an IP address from my network, I am wondering whether this requirement, whose meaning I completely ignore, is the source of the problem.

Do you think you can help me out on this one?

Cheers,

Mario
Prof. Mario Vietri
Scuola Normale Superiore
56100 Pisa
Italia

Tel.: 39-050-509096
FAX:  39-050-509045
Cell: 39-333-7877992