XPost: alt.comp.os.windows-10, comp.mobile.android   
   From: java@evij.com.invalid   
      
   On 28/01/2024 05:32, Mickey D wrote:   
   > I'm relatively new to wireless networking & ask you for debug advice.   
   > Everything is working but there are errors I'm trying to figure out.   
   > https://i.postimg.cc/FR3X1FC5/settings.jpg   
      
   FWIW as a comparison, I have here an old Cisco WRT320N flashed with   
   'DD-WRT v24-sp2 (12/24/10) big - build 15962' set up as a Client Bridge   
   to connect my bedroom to the rest of my LAN & currently it has symmetric   
   errors of 2 on both Rx & Tx.   
      
   As your errors are asymmetric, I might be inclined to suspect a fault in   
   the hardware of the DD-WRT device itself, but, assuming FTM that it's   
   alright, you can view other sources of WiFi by pressing either of the   
   two buttons at the bottom of that page (ie the Status, Wireless page):   
   	Site Survey   
   	WiViz Survey   
      
   Anything interesting come up there?   
      
   > Where that "wireless bridge client repeater" is bridged 1:1 to an   
   > access point which happens to be on the non-overlapping channel 11.   
   >   
   > The debug took   
      
   ... RIP Barry :-) ...   
      
   > I'm using on Android to find the noise sources is this.   
   > https://play.google.com/store/apps/details?id=com.ubnt.usurvey   
      
   > But of course, that only records Wi-Fi sources, not all nearby radios.   
   > https://i.postimg.cc/Bv809Bxv/channels.jpg   
      
   Have no knowledge of that particular tool, but the output looks alright.   
     FWIW, my preference is WiFi Analyzer by Kevin Yuan, I'm on v3.11.2,   
   but yours is probably fine.   
      
   > While that only shows wi-fi interference sources, there are   
   > no baby monitors nearby that I know of. No microwave in use.   
   > No airport nearby. No doorbell cameras. Nothing that I know of.   
   >   
   > Even the phone, connected to that same channel 11 access point   
   > shows a steady downarrow of 390Mbps but the uparrow flips every   
   > few seconds between 433Mbps and 6Mbps (consistently the same numbers).   
   > https://i.postimg.cc/rw1whtBb/android.jpg   
   >   
   > While I'm not at all sure what that even means for the uparrow to   
   > be flipping between over 400Mbps and less than 10 Mbps, below are   
   > the basic wireless settings of the bridge connected to the desktop.   
   > 1. Desktop PC 1 floor from the main router has no Wi-Fi. Only Ethernet.   
   > 2. So I plugged an old Netgear WNR834Bv2 into that Ethernet RJ45.   
   > 3. And I installed DD-WRT onto that Netgear WNR834Bv2 & set it up as   
   >      Setup | Advanced Routing | Operating Mode = Router   
   >      Setup | Basic Setup | WAN Connection Type = Disabled   
   >      Wireless | Basic Settings | Radio Mode = Repeater Bridge   
      
   Here I have Client Bridge obviously.   
      
   >      Wireless | Basic Settings | Network Configuration = Bridged   
   >   
   > How do I debug the high transmission error rate?   
   >   Status | Wireless | Wireless Packet Info | Received (RX) = 100%   
   >   Status | Wireless | Wireless Packet Info | Transmitted (TX) = 14%   
   >   
   > And how do I investigate the source of this continued interference?   
   >   Status | Wireless | Access Points & Clients | Signal = -38 dBm   
   >   Status | Wireless | Access Points & Clients | Noise = -81 dBm   
   >   Status | Wireless | Access Points & Clients | SNR = 43   
   >   
   > There are a few questions related to how do I debug?   
   > a. What Android tool will find noise sources _outside_ Wi-Fi channels?   
   > b. How do I test for where all that noise is coming from?   
   > c. Why am I receiving all but losing almost all my bridge packets?   
      
   I can't answer your specific questions above, but the asymmetry between   
   Tx & Rx suggests to me that perhaps the DD-WRT device itself is faulty   
   in some way, but, unless you have another identical or at least similar   
   device you could try in its place, I agree it would be preferable to   
   rule out other possibilities before attacking that, as it might be   
   expensive and would at least require some time spent to setup an   
   alternative as a replacement only then to find the problem still exists.   
     Some suggestions for possible investigation might be ...   
      
   1  Listening to an old analog radio to see if that shows an intermittent   
   source of noise.   
      
   2  Someone has a faulty or unsuppressed electrical appliance which comes   
   on intermittently such as a fridge &/or freezer, electric drill in a   
   workshop, etc.   
      
   ... but I can't suggest a particular reason why Tx & Rx might be   
   affected asymmetrically by an extraneous source of noise  -  perhaps   
   others more knowledgeable than myself might be able to.   
      
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