Deco bug: Deco is assigning a wired device to a satellite Deco and throughput plummets
Wired throughput can plummet if a wired device gets assigned to a Deco that isn't directly connected to the internet. This seems to be a Deco bug with an easy repro.
Consider the following configuration: a computer and two Deco M5s are all attached via Ethernet to the same switch (the Decos are wired to allow wired backhaul). One of the Decos (let's call it 'Main') is also connected to the Internet and is acting in Router mode. In this situation, NO wireless connectivity is being used. Here is a diagram:
--- |S|---------- Computer |W|---------- Deco M5 "Satellite" |I|---------- Deco M5 "Main" --------------- CableModem ---------- Internet |T| |C| |H| ---
If you look in the app (tap the big "Internet" button to see the Deco devices, then tap "Main"), you will see "Computer" listed there. Note that there is ONLY a WIRED connection between Computer and Main. WiFi on "Computer" is turned off.
The internet connection is 1Gbps. If I test the internet speed with the Deco app, I get about 900Mbps which is great. If I test the internet speed from "Computer", I get about the same -- also great.
Now unplug & restart "Main" Deco M5. Of course, "Computer" loses connection but after Main reboots, internet connectivity is restored but "Computer" now appears as managed by "Satellite" Deco M5 (as reported in the list of devices in the app under Internet / Satellite).
Now the download speed tested from Computer is about 250Mbps and it stays that way. Download speed tested via the Deco app is still 900Mbps.
If I unplug Satellite, sure enough Computer cannot access the internet (which is *really* surprising since the routing tables have not changed and nor has the ARP table and "Computer" is clearly using "Main" as its router). I seriously suspect that when "Computer" is associated with the "Satellite" Deco, data is going to Main then to Satellite then back to Main then out to the internet! Eventually, with Satellite unplugged, "Computer" gets reassigned to "Main" and high throughput to "Computer" is restored.
I cannot find a way to force a specific wired device (or all of them) to be associated with the Main Deco unit. Is there a way to do it? Or another way around this issue?
Also, since this looks like a Deco bug to me, is this the right place to report a bug? Does tech support monitor these posts?
Thanks,
-JohnnyQ.