On Tue, 2020-09-29 at 23:21 -0300, Ramon Fontes wrote: > I'm running 2 virtual interfaces: one in master mode with hostapd > (802.11n in 40MHz) and the other one in managed mode. > > I can confirm that the AP is working on 40MHz: > > ap1 iw dev ap1-wlan1 info > Interface ap1-wlan1 > ifindex 221 > wdev 0x6c00000001 > addr 02:00:00:00:02:00 > ssid new-ssid > type AP > wiphy 108 > channel 3 (2422 MHz), width: 40 MHz, center1: 2432 MHz > txpower 14.00 dBm > > as well as the client: > > sta1 iw dev sta1-wlan0 info > Interface sta1-wlan0 > ifindex 219 > wdev 0x6a00000001 > addr 00:00:00:00:00:02 > ssid new-ssid > type managed > wiphy 106 > channel 3 (2422 MHz), width: 40 MHz, center1: 2432 MHz > txpower 14.00 dBm > > However, tx/rx bitrates of the client are not equivalent to the 40 MHz > channels. Only the MCS index seems to be ok and I can change it via > iw. You are setting it fixed? What if set the bandwidth too? Or maybe that's not implemented right? I was going to say that for rate scaling there's no requirement to pick 40MHz, although there's no reason (especially in hwsim) for it to pick anything else either, so that's a bit odd. > For some reason I can see the correct tx/rx bitrate right at the > beginning of the association (e.g. tx bitrate: 270.0 MBit/s MCS 15 > 40MHz), but right after that they change to 20 MHz. I have been trying > to identify errors in mac80211_hwsim, but I was not successful. Can > anybody help me? I did tests with/without wmediumd and the results are > the same. Now I'm confused - you said here "they change", but above you set you were actually setting them fixed? So they should change? If you do nothing fixed, what happens? johannes
