Start on 2.4 GHz AP with HT Only (not just HT40) set. That is, AP that doesn't allow 1 Mbps packets to be sent. Scan, make sure 1 mbps packets are sent. Start on 5 GHZ AP with HT Only set. Scan. What rate are probes sent at for 2.4 GHz? Dan On Mon, Feb 7, 2011 at 10:03 AM, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote: > On 02/06/2011 09:42 PM, Daniel Halperin wrote: >> >> Right. I think there is a function something like "send_rate_low" that >> sends the lowest entry in the mac80211 enabled rates table for control >> and mgmt packets. If the NIC is associated to an HT Only AP then that >> lowest entry should be HT20 MCS 1, I'd think. >> >> Also, does circumventing "set channel type" code work properly across >> bands? If you start on 5 GHz will it send 6 Mbps probes or 1 Mbps >> probes? > > I did some tests with a sniffer set up: > > I have 8 STA vifs. > > 1) AP is setup to run on channel 11, HT40- > Let all associate on channel 11, radio goes to HT40- mode. > Run Scan on operating channel: > Probe request is reported as 1Mbps data rate on ch 11. > > 2) Scan on all channels: > Probe requests on 2.4Ghz channels are 1Mbps data rate. > Probe requests on 5Ghz channels (channel 40 in this case) > are reported as 6Mbps data rate. > > 3) Kill AP, no VIFS are associated (radio goes to NO_HT) > Run scan on all channels. > Probe request on channel 40 is 6Mbps data rate. > > > Please note that with my patches, the channel-type is still set to NO_HT > if we are scanning off the operating channel. Since test 1 appears to > function properly, I think that verifies that we can safely send NO_HT > requests while leaving the radio at HT40-. > > Please let me know if this answers your concerns. If you can think of > other combinations I should try, please let me know that as well. > > Thanks, > Ben > > -- > Ben Greear <greearb@xxxxxxxxxxxxxxx> > Candela Technologies Inc http://www.candelatech.com > > -- 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
