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Deco X1500 (X10) main router vs satellite router speed

Deco X1500 (X10) main router vs satellite router speed

Deco X1500 (X10) main router vs satellite router speed
Deco X1500 (X10) main router vs satellite router speed
3 weeks ago - last edited 2 weeks ago
Model: Deco X1500  
Hardware Version: V1
Firmware Version: 1.1.7 Build 20240911 Rel. 53484

I have following mesh setup with 3 Decos (X1500 aka. X10):

 

Fiber ONT --- main Deco --- Switch (TL SG108) --- satelite Deco 1

                                                                                                \---satelite Deco 2

 

Decos are in router mode. QoS is disabled.

 

I also have third satellite Deco (M4R) in the switch, but having it here or not doesn't seem change the problem in any way. I removed it from mesh while testing different things.

 

These Decos are using ethernet backhaul. Each device is connected via patch panel where it connects to different rooms. Cabling inside walls is Cat6 UTP. Cable between ONT and main Deco is also Cat6 UTP. Other cables are Cat6 S/FTP.

 

Speed offered by provider 1000 Mbps (or 1 Gbps) and doing speed test on Main Deco, I'll get now about 600 Mbps via Wifi when testing with my iPhone. This is fine.

 

Problem is that from satellite Decos, I'll get only around 90 Mbps. Like perhaps ethernet autonegotiation would have put it to 100 Mbps mode (can I check this somehow from Decos?). Although sometimes after resetting some or all routers, I might get around 130 Mpbs from satellites, which is still bad but at least would indicate autonegotiation managed to get in 1 Gbps mode.

 

Now if I rewire things so that one of the satellite Decos becomes main Deco, then exactly the same happens: proper speeds from main Deco and bad from satellites. But I think this proves that cabling is ok as whichever is is main Deco gives me way over 100 Mbps.

 

Other things I have tried:

1. Daisy chaining satellites (no switch). Exactly the same result.

2. Decos in AP mode (I connected router my ISP gave to ONT and from there to my main Deco). Same result.

 

So why is the speed from satellite Decos so bad?

 

Any ideas what I could still test?

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#1
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1 Accepted Solution
Re:Deco X1500 (X10) main router vs satellite router speed-Solution
2 weeks ago - last edited 2 weeks ago

  @David-TP Thanks. I didn't notice there was newer firmware available.

 

I did some additional testing and my problem might after all be some kind of cabling issue.

 

After moving my main Deco on other side of my living room where there are also ethernet sockets on wall, I can get same speed from satellites as from main Deco. I have updated firmware for 2/3 of my X1500s and also the not updated gives proper speed.

 

Why this is weird is that when I earlier tried setting my living room Deco as satellite (star configuration with switch), it still somehow affected all other satellites. I could understand that this one satellite could for some reason autonegotiate 100 Mbps, but other satellites should/could still independently use 1000 Mbps.

 

I'll need to do more testing.

 

It would be great if Deco phone app would show autonegotiated link speeds for different ports on each router. It would make debugging this kind of issues a bit easier.

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#4
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3 Reply
Re:Deco X1500 (X10) main router vs satellite router speed
3 weeks ago

  @deepthinker 

 

To be honest sounds like a bad cable(s) i have listed some common trouble shooting problems below. Please see the section in bold. 

 

i would make sure your network is set up using one of the examples in the post below

 

https://community.tp-link.com/en/home/forum/topic/98898 and that your network switch is compatible with deco routers. Here is a link to switches that are compatible with deco routers https://www.tp-link.com/us/home-networking/all-soho-switch/

 

Another thing it could be is bad Ethernet cables. Here is a great example of how a bad cable can cause problems https://community.tp-link.com/en/home/forum/topic/838210?replyId=1598872

 

For the WiFi side of things you could be running into network interference have you tried the Network Optimization tool? In the deco app click on More > Network Optimization > Scan

 

More troubleshooting options can be find in the post below in the "Recommended Troubleshooting" section at the bottom. 

 

https://community.tp-link.com/us/home/kb/detail/412864 

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#2
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Re:Deco X1500 (X10) main router vs satellite router speed
3 weeks ago

  @deepthinker 

Hi, it is suggested to manually update to the latest 1.3.0 version via web UI first:

Deco X1500(EU)_V1_1.3.0 Build 20250725

 

If the speed from satellite Deco units is still capped at 100mbps, I would like to forward your case to the senior engineer for further assistance.

Thank you very much.

Wait for your reply.

Best regards.

▶Check What's Currently Going on With Deco ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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#3
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Re:Deco X1500 (X10) main router vs satellite router speed-Solution
2 weeks ago - last edited 2 weeks ago

  @David-TP Thanks. I didn't notice there was newer firmware available.

 

I did some additional testing and my problem might after all be some kind of cabling issue.

 

After moving my main Deco on other side of my living room where there are also ethernet sockets on wall, I can get same speed from satellites as from main Deco. I have updated firmware for 2/3 of my X1500s and also the not updated gives proper speed.

 

Why this is weird is that when I earlier tried setting my living room Deco as satellite (star configuration with switch), it still somehow affected all other satellites. I could understand that this one satellite could for some reason autonegotiate 100 Mbps, but other satellites should/could still independently use 1000 Mbps.

 

I'll need to do more testing.

 

It would be great if Deco phone app would show autonegotiated link speeds for different ports on each router. It would make debugging this kind of issues a bit easier.

Recommended Solution
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#4
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