Joined: 30 Sep 2008 Posts: 32 Location: Summerville, SC, USA
Posted: Wed Aug 10, 2022 20:56 Post subject: Changing channel width on one interface results in both
Asus RT-AC87U running r49599. I had the channel width set to the default/20 MHz on both the 2.4 and 5 GHz interfaces. I set the 5 GHz interface to Wide HT40. It took and I'm getting better performance on 5 Ghz. However, using Wifi Analyzer, I'm seeing that my 2.4 GHz interface is now using a 40 MHz channel, where it definitely previously showed 20. The web gui still shows the 2.4 GHz interface is configured for 20, but Wifi Analyzer shows it using 40. Any clues?
Joined: 30 Sep 2008 Posts: 32 Location: Summerville, SC, USA
Posted: Sat Aug 13, 2022 11:39 Post subject:
Even though the channel width was set to 20 MHz in the gui, I tried toggling it to 40, and back to 20, rebooting each time. Nothing seemed to make a difference, I was still using 40 MHz at 2.4. I thought there might be a disparity between the nvram variable setting and what the gui was showing, yet "nvram show" definitely indicated wl0_nbw=20. I ended up installing the latest firmware, r49677, just for fun and wouldn't you know, suddenly I was back to 20 MHz on the 2.4 interface, while I was still using 40 on the 5 interface. So I thought maybe it was just something in the older firmware, driver, or whatever changed. Thinking it was fixed...now this morning, I see I'm somehow magically back to 40 MHz on the 2.4 interface. Weird. Just some thoughts in case someone else runs across this.
Joined: 30 Sep 2008 Posts: 32 Location: Summerville, SC, USA
Posted: Sat Aug 20, 2022 13:47 Post subject:
For anyone who's interested. I don't think changing the channel width on my 5 Ghz interface had anything to do with the 2.4 Ghz interface changing to 40. It randomly changes from 20 to 40 throughout the day. Ultimately, I settled on an 80 Mhz channel width on the 5 Ghz interface, and left the 2.4 Ghz interface at 20. But using Wifi Analyzer (Android app), I can see the 2.4 Ghz interface changing from 20 to 40, and back, throughout the day. Would be nice if it just stayed at 20, because I have a lot of 2.4 congestion in my neighborhood. But oh well.