BE85 slow download (using SFP+ connection)

BE85 slow download (using SFP+ connection)

BE85 slow download (using SFP+ connection)
BE85 slow download (using SFP+ connection)
2024-06-18 07:49:38 - last edited 2024-08-24 20:10:53
Model: Deco BE85  
Hardware Version: V1
Firmware Version: 1.0.18

So I got a pair of Deco BE85 units.

 

My current configuration is ISP's optic fiber going straight into my Mikrotik CCR2004-1G-12S+2XS rounter's SFP28 port (I got a 25G up / 25G down connection, and it is really able to achieve those speeds, e.g. https://www.speedtest.net/result/c/56f1e8cd-ee62-40e5-b749-3345797a80aa)

 

Deco is configured to work in the Access Point mode with a wired backhaul, both units are connected to said Mikrotik router with a fiber optic cable using 10G SFP+ fiber optic modules.

 

The issue is that the speed test built into Deco units is only showing around 3.5G download speeds (but is showing 9.5G upload speeds). I am pretty sure that it is not a routing / connectivity / SFP+ module / ISP issue, because swapping that SFP+ module from Deco to a desktop computer would always show 10G for both upload and download speeds.

 

It is also not a speedtest server problem, as I'm using the same server that I know for sure is capable of 25G speeds (see the link above).

 

So the question is: How to fix that 3.5G download speed to be closer to expected 10G?

 

Thanks!

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#1
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1 Accepted Solution
Re:BE85 slow download (using SFP+ connection)-Solution
2024-08-24 20:10:45 - last edited 2024-08-24 20:10:53

Closing the loop here. I had quite a bit of back-and-forth with TP-Link support, including remote debug sessions etc.

 

Eventually it was diagnosed as an issue when BE85 is connected to my Mikrotik ccr2004-1g-12s+2xs. At the same time, other devices connected to said router were showing speeds of up to 20G (or 10G depending on the port).

 

While not a complete solution, changing that Mikrotik to an x86 PC running the same Mikrotic RouterOS with the same configuration (updated for the new port scheme) shows 10G/10G SpeedTest on Deco.

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#9
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Re:BE85 slow download (using SFP+ connection)
2024-06-18 16:21:23

I have noticed that during said speedtest, Deco's CPU utilization maxes out at 100%. Does that mean the unit is just incapable of delivering anything beyond 3.5Gbps?

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#2
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Re:BE85 slow download (using SFP+ connection)
2024-06-18 20:39:08

  @Max_M 

 

internet Who spf+ are you using 10getenk  depending the switch your using  that might be the issue  yes i love have 10 gb 

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#3
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Re:BE85 slow download (using SFP+ connection)
2024-06-19 03:58:11

  @Max_M 

Hi, May I know the model number of the 10G SFP+ fiber optic modules here?

I noticed you mentioned, "swapping that SFP+ module from Deco to a desktop computer would always show 10G for both upload and download speeds".

---Did you use a 10G SFP+ copper module instead or is your computer equipped with a 10G SFP+ PCI board?

 In the meantime, I would like to follow up on your case via email since I might need to consult the engineers for more advice.

 

Thank you very much and best regards.

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#4
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Re:BE85 slow download (using SFP+ connection)
2024-06-19 06:23:23

  @David-TP Hi, and thanks for the response. 

 

The SFP+ modules I'm using are optical, not copper. Specifically, they are https://www.fs.com/products/74681.html and matching https://www.fs.com/products/74682.html on the other end, with a generic configuration.

 

I'm pretty sure they are not in play here though. To isolate the issue, this morning I connected my [Main] Deco to the same router using a regular copper Cat7 cable, and got exactly the same result.

 

Additionally, I tried disconnecting my second Deco, and testing the remaining one with both (copper and SPF+) conection options, getting the same results.

 

The last thing to try that came to my mind is swapping the primary Deco role to the other unit – again, exactly the same result.

 

In all cases, I can confirm on Mikrotik side that the link has succcessfully auto-negotiated as 10G full duplex one.

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#5
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Re:BE85 slow download (using SFP+ connection)
2024-06-20 01:56:34

  @Max_M 

Hi, Thank you very much for the update. These tests are very helpfullaugh.

I have forwarded the case to the senior engineer and please check the email for more suggestions.

Best regards.

 

 

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#6
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Re:BE85 slow download (using SFP+ connection)
2024-06-20 02:47:02

Very interesting topic,

i am also looking to update my home network to 5gbit download\upload internet next month.

with sfp+ connection with Deco BE95

 

if you find way to bypass 3.5gbit limit please write your recommendations

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#7
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Re:BE85 slow download (using SFP+ connection)
2024-07-16 06:47:18 - last edited 2024-07-16 06:47:34

I got internet upgrade and after disabling QOS option in mobile app settings i easily got 4.5gbit in both ways download and upload

Router CPU load in this time about 10-15% 

 

With QOS turned on it was about 2 - 2.5 gbps

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#8
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Re:BE85 slow download (using SFP+ connection)-Solution
2024-08-24 20:10:45 - last edited 2024-08-24 20:10:53

Closing the loop here. I had quite a bit of back-and-forth with TP-Link support, including remote debug sessions etc.

 

Eventually it was diagnosed as an issue when BE85 is connected to my Mikrotik ccr2004-1g-12s+2xs. At the same time, other devices connected to said router were showing speeds of up to 20G (or 10G depending on the port).

 

While not a complete solution, changing that Mikrotik to an x86 PC running the same Mikrotic RouterOS with the same configuration (updated for the new port scheme) shows 10G/10G SpeedTest on Deco.

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#9
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