@Joseph-TP 

 

To repeat -  I have two BE800 connected via SFP+  in a main router/ access point configuration. 

 

ISP Fiber gateway (Huwaei)-----1Gbe-----BE800 Main-----10GSFP+ Fibre--------BE800 Access Point

BE800 Main - Devices

PPPoE Wan connection to ISP gateway  1 x 1G

SFP+ connection to BE800 AP  1 x 10G Fibre

Qnap NAS 2 x 2.5G

Laptop  1 x 2.5G

 

BE800 Access Point - Devices

SFP+ connection to BE800 Main  1 x 10G Fiber

VR streaming Desktop 1 x 10G

LG  TV  1 x 1G

Nvidia Shield 1 X 1G

LG TV 1 x  WiFi 5

VR Headset  1 x WiFi 7  

 

The speed randomly drops between the two BE800 from 10G to 1G  - the only way i can see this drop is via the web interface or by a collapse in copy time between BE800 main and BE800 access point.  The only way i know to fix it is unplug one of the fiber modules or reboot one or both routers.   

 

 

I have been able to recreate the problem - not consistently - by switching off the BE800-AP and switching back on again. It sometimes comes back as degraded 1G not 10G. In my limited testing if i do a software restart it does not cause or solve the problem. Once the link has degraded the only way I have found to solve it is to power down the BE800-Main and power up again.

  @Joseph-TP 

 

Not sure i understand your question but I'll  give the latest example which might explain it ?.

Full disclosure in terms of changes made.

I have downgraded the firmware in both devices to the debug version advised by your engineer. V1_1.2.3_250623

I have disabled all overnight reboot and eco power options in both devices in case these were affecting or causing it.

It is my current observation that once the link is down speed any reboot, hard or soft, on the BE800 AP will usually not restore the speed.
I have seen exceptions to that but this seems to be the mostly reproducible norm. 

 

Last testing ~ 8PM last night working 10G SFP + link
First testing ~ 9AM  this morning working 10G SFP+ link
Soft reboot BE800 AP

SFP+ Link downgraded to 1G

Soft or hard reboot BE800 AP 
SFP+ Link remains downgraded to 1G 

Switch off both BE800

In sequence

Boot BE800 Main

Boot BE800  AP     

SFP+ link restores to 10G (usually)

The boot sequence logs for BE800 Main and BE800 AP only have one line for SFP but they do appear to be different.
No connection speed is reported in the logs at either 1G or 10G.    

 

  @Joseph-TP 

 

I've posted this response  in two places because a similar question was in two different  places 

I'm now using  Beta 1.2.99 Build 20250806 rel.35019(4153) . This appears to have fixed my degraded speed problem on SFP+ links between BE800 and devices. 

I'm waiting on a full supported release.

Not sure what tp-link  did but looking at the log for the latest beta there appears to be much more SFP+ negotiation going on at boot. 
In my case any kind of power down (soft, hard, scheduled overnight) with Finisair SFP+ modules  was triggering the issue where the link speed would often degrade to 1Gbs.  I could usually fix by rebooting the BE800 Main  or unplugging and re-plugging the fiber link. It seemed to depend on which device came up first. 
It took me a while to realize it wasn't entirely random  because Tether doesn't display  link speed display and because while the BE800 device display can be configured to show smileys and snowflakes it doesn't show anything useful regarding link status.  As part of my own diagnostics  I swapped the Finisair and OM3  with Ampcom and OM5  and the problem became consistent after every reboot which made it much easier to prove. 

 

I've tested the Beta 1.2.99 Build 20250806 rel.35019(4153)  with Finisair and Ampcom SFP+ SR modules, with 10 Meters  OM5 and 15 Meters OM3 Fiber. All now appear to work OK.  

The Ampcom 10Gbs Copper Dac I started with still doesn't work in any reliable way - sometimes 1Gbs sometimes nothing. 

 

Based on my PC - BE800 and BE800 to BE800 SFP+  testing all this saved me about 100 µs (0.1ms)  latency testing over RJ45 - 10Gbe.