Deco M5 speed degrades after a few days
I have the following setup
Deco M5 (main) -(utp)-> TP link switch SG105 -(utp)-> Deco M5
-(utp)-> TP link switch SG105 -(utp)-> Deco M5
-(utp)-> Deco M5 (X) -(utp)-> Laptop
The Deco M5 marked with X is the one giving trouble; what happens is this:
Everything works fine, after a few days the performance of that Deco degrades (from 500Mbps to around 85-90Mbps).
When I switch both utp cables from position the performance is back to normal again. After a few days I need to repeat this.
The other deco's do not have this problem. I tried replacing cables but the issue remains.
What can be the cause of this? Is there someway that I can debug this to see why this deco decides to maximize this the speed to 85-90Mbps.
(btw it is always around 85-90Mbps).
Best regards,
Lars
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@TP-Link So I finally found the culprit. It was one of the switches that caused the speed to degrade. When logged in in the SG105e I noticed that one of the ports has its Speed/Duplex actual setting to 100MF (when Config was set to Auto). When changing that to manual 1000MF the performance no longer degraded. See image below, Port 4 was reporting only 100MF.
What can be the reason that this is automatically set to 100MF when the Config is set to AUTO instead of 1000MF?
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Are you sure the X router is connected to another Deco using cable? Please check (when the speed degrades) in the app it must "Ethernet";
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@NanoG6 Yes it is connected via Ethernet when this happens. What is strange to me that it always degrades to the same limit ~ 80-90 Mbps. As if there is some limit somewhere...
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I was also have this issue, but only download speed that have issue while upload speed just fine. I have sold it and bought a new one and problem solved.
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@NanoG6 Thanks for replying, i can check the upload speed as well. I will also switch it with another to see if it still happens or not. I was hoping to be able to debug this to see what is happening.
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Hi, we would love to help you debug the current issue.
At the same time, could you please help me check some details:
1. How often did this issue repeat within one day?
2.if not unpluging the cables, would the speed stay at 85-90m/s?
3. Could you please swap the location of this Deco with others to check whether it is always the same one that had the issue?
Thank you.
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Hi @TP-Link
#1: This happens every couple of days, not multiple times per day
#2: Yes
#3: I will and let you know.
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@TP-Link So I finally found the culprit. It was one of the switches that caused the speed to degrade. When logged in in the SG105e I noticed that one of the ports has its Speed/Duplex actual setting to 100MF (when Config was set to Auto). When changing that to manual 1000MF the performance no longer degraded. See image below, Port 4 was reporting only 100MF.
What can be the reason that this is automatically set to 100MF when the Config is set to AUTO instead of 1000MF?
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