Hi  @ironmanc 

 

Could I confirm with you that the speed you mentioned dropped to 11Mbps, is it the speed of TL-WPA8631P? Which unit would you set as the powerline adapter connected to the router via LAN port?

There should be no compatibility issues in the same 8 series, and as you mentioned, when a single TL-WPA8631P and one of the TL-PA8030Ps are connected, the speed will be very high. So we can rule out compatibility issues.

Now our focus is to locate whether the problem comes from a specific device or a specific location.

Let's call the fast TL-PA8030P unit A, and the slow one unit B.

For the two TL-PA8030Ps, have you tried to connect unit B directly to the router through the LAN port? Then remove unit A and compare whether there is also a slow speed problem when only unit B and TL-WPA8631P are connected?

If the speed is normal, then the problem is most likely caused by an unsatisfactory powerline environment. At this time, please put unit A in another location that is slightly away from the router and test whether the problem will occur after adding a third powerline adapter?

On the contrary, if the speed is still very slow, the problem can basically be judged to be from unit B.

If there are any updates, please feel free to give us feedback.

Hi @Joseph-TP and thank you for your reply.
In order to give you as much information as possible, I have performed a lot of tests.
I have several devices in my possession and I have created test cases and documented the measured speeds. I have not run speed tests due to lack of time and have only collected the data provided by the various tools.

If anything is unclear, please let me know.

One thing I would like to point out: I asked for support because I experienced very slow connections between TP-Link devices.

Happy reading :D

 

Legend

Router: TL-MR600

Powerline A: TL-PA8030. Mac: 9F

Powerline B: TL-PA8030. Mac: DF

Powerline W: TL-WPA8631. This device has the speed meter. Mac: B7

Powerline T1: Other powerline. Mac: 7D

Powerline T2W: Other powerline with wifi. This device has the speed meter. Mac: 28

Powerline S: Other powerline. Mac: 5E

GALILEI: wifi from Router

GALILEO: wafi from Powerline T2W

SOCRATE: wifi from Powerline W

 

 

Test 1: TL-WPA8631 + TL-PA8030(A)

Result: All OK

 

 

Test 2: TL-WPA8631 + TL-PA8030(A) + TL-PA8030(B)

Result: B is the slow node

 

Test 3: TL-WPA8631 + TL-PA8030(B)

Result: All OK

 

 

Test 4: TL-WPA8631 + TL-PA8030(B) + TL-PA8030(A)

Result: A is the slow node

 

Test 5: TL-WPA8631 + T1 + TW2 + S

Description: I decided to remove both TL-PA8030P powerlines and add several other powerline devices from other brands

Result: All OK.

The devices involved have lower specifications and speeds than TpLink devices. So it is normal for them to be slower.

 

 

Test 6: TL-WPA8631 + T1 + TW2 + S + TL-PA8030P(B)

Description: added Powerline B

Result: all devices except (B) continued to function properly.

 

 

 

 

Test 7: TL-WPA8631 + T1 + TW2 + S + TL-PA8030P(A)

Description: removed Powerline B and added Powerline A

Result: all devices except (A) continued to function properly.

 

Test 8: T1 + TW2 + S + TL-PA8030P(A)

Description: removed Powerline W

Result: all devices except (A) continued to function properly. Powerline A seems to have increased transmission speed.

 

 

Test 9: T1 + TW2 + S + TL-PA8030P(B)

Description: removed A and added B

Result: all devices except (B) continued to function properly. Powerline B seems to have increased transmission speed.

 

 

 

Conclusions

I repeat that I have not performed speed tests due to lack of time.
From the results collected, some conflict would seem to arise in the following cases:
- when TL-WPA8631, TL-PA8030(A), TL-PA8030(B) are all together in the same network. [Test nr. 2 and 4]
- when TL-WPA8631 is networked with TL-PA8030(A or B) but the TL-PA8030 is not directly connected via LAN to the router. [Test nr. 6, 7, 8, and 9]

 

Is there any additional check I can perform?

 

Thank you and sorry for the long message.