One way data?

psteichen

Commendable
Dec 14, 2016
4
0
1,510
I'm having a hard time solving a problem on my home network.

Basic layout: modem -Eth- router -Eth- AP -WDS Bridge- AP -Eth- AP -WiFi- devices

You can probably tell by my made up syntax that I'm not a pro. My problem is that my devices can send data towards the router (upload) at around 10+ Mbps, but can only receive data (download) at less than 1 Mbps. Not only that, but upload is more stable, while download is very intermittent and even pauses completely for many seconds at a time.

I measured and graphed the speeds using a server app connected directly to the router, and disabled all other devices during the test besides the test device.

What could be causing data to flow quickly and smooth-er in one direction, and slow and intermittent in the other? (and even the upload is less smooth than I'd expect)

Upload Graph

Download Graph
 
Solution
Going to be hard to find. You likely should test at each point and see which link it causing the issue. You would start at the router and move out 1 device at a time. You have 2 radio links in the path which are the most likely problem.

Generally this means one unit is better able to hear the other unit but it is unable to transmit a strong enough signal for the data to be sent the other way. Most units transmit at maximum legal levels but you would have to research to be sure.

This can be due to interference or related to loss of signal due to distance and absorption by walls and such.

With as many radio device as you have be very sure you are not causing interference with yourself. This involves careful planning of the...
if the modem is an all in one from your isp and your using another router make sure one of them you turn off dns services. you want the main router to hand out ip info. same for the bridge make sure you use a fixed ip on your network and not a floating one wiht dns service. on slow wifi check to see if there more then one wifi using the same channel. sometime moving to another non use channel will help.
 
Going to be hard to find. You likely should test at each point and see which link it causing the issue. You would start at the router and move out 1 device at a time. You have 2 radio links in the path which are the most likely problem.

Generally this means one unit is better able to hear the other unit but it is unable to transmit a strong enough signal for the data to be sent the other way. Most units transmit at maximum legal levels but you would have to research to be sure.

This can be due to interference or related to loss of signal due to distance and absorption by walls and such.

With as many radio device as you have be very sure you are not causing interference with yourself. This involves careful planning of the radio channels you are using.

Wifi is hard enough some times with only a single radio link when you run mulitple it makes it even harder to troubleshoot.
 
Solution

psteichen

Commendable
Dec 14, 2016
4
0
1,510
I've found that both Wi-Fi links in the chain have dramatic peaks and valleys in the graph of their transfer rates. As a result, data is only getting through when two peaks line up. Not sure how to achieve a smooth transfer.