On 2010-04-27 3:34 AM, Luis R. Rodriguez wrote: > On Mon, Apr 26, 2010 at 5:25 PM, Luis R. Rodriguez <mcgrof@xxxxxxxxx> wrote: >> On Mon, Apr 26, 2010 at 5:12 PM, John W. Linville >> <linville@xxxxxxxxxxxxx> wrote: >>> On Tue, Apr 27, 2010 at 01:30:02AM +0200, Felix Fietkau wrote: >>>> On 2010-04-27 1:23 AM, John W. Linville wrote: >>>> > On Tue, Apr 27, 2010 at 01:23:35AM +0200, Felix Fietkau wrote: >>>> >> This is used to configure APs to not bridge traffic between connected stations. >>>> >> >>>> >> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx> >>>> > >>>> > Is this useful? >>>> Yes, if you have an AP with lots of users that aren't expected to >>>> communicate with each other (e.g. only for internet access), it can save >>>> a lot of airtime by not forwarding every broadcast message emitted from >>>> any station. >>>> I'm sure there are a more situations where this can be useful. >>> >>> Ah, OK -- I suppose that makes sense. >> >> In fact technically IEEE-802.11 2007 section 11.7 states "STAs are not >> allowed to transmit frames directly to other STAs in a BSS and should >> always rely >> on the AP for the delivery of the frames", with the exception being >> using DLS direct links for QoS STAs. This would prevent the STAs from >> going into PS mode for as long duration of the stream. >> >> If the AP does not support this it would just set the result code for >> DLS requests to "Not allowed in the BSS". It does not seem the >> standard has a way for an AP to teardown an existing DLS links though >> (at no reason code for it), so I guess if we ever support DLS we won't >> be able to enable this option if a direct links is already >> established. > > Now that I think about it, why is this even required, why not just > enforce this all the time and have an option to disable DLS? Are there > ways to enable direct STA <--> STA communication on a BSS other than > DLS? I think allowing/disallowing DLS should be separate from AP isolation. In some cases, AP isolation might only be used to reduce the amount of broadcast traffic, and DLS wouldn't be a problem then. - Felix -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
