Hey guys i got this unique issue:

Running on unifibiz 800mbps

1. I got a new ax73 tp link to replace old router.

2. This ax73 is connected :
- 16 port gigabit switch
- 4 + 2 poe gigabit switch
- 5 port gigabit switch

All above is connected to lan port 1 2 3.



When i first tested ax73 connected to internet (connected via lan cat6 cable) on my network setting i could pair 1.0gb connection.everything was n perfect.

After i connected all those switches, now all my lan ports from is 100mbps no more 1.0gb/1000mbps

Things i did to double check :
1. Change cat 6 cables
2. Direct connect to lanport without switches connected to ax73 router.
3. Factory reset and reconfigured to connected to Internet.
4. Factory reset and skip all configuration just to check connection via lan cable still get 100mbps only (all ports on ax73).
5. Set evrything is setting laptop n router to 1000mbps full duplex.

All failed to get same results as first test.


Ok now anyone of you have encountered this. I think somehow something burnt of and capped my ax73 router lan port to 100mb.

Please id anyone got any solution or what did i do wrong.

all i think yr equipment/s survive the lightning barrage, but have some h/w degradation.

Did it auto update firmware or something?

Yes after I setup i did update firmware.

highdoubt if kena lighting surely modem kaput right or all ports down...this is the port only can communicate in 100mbps.

Seriously puzzled.

So after update you sure the connection was still 1Gbps?

This post has been edited by ihavenoidea: Nov 18 2021, 10:15 AM

Yes I've updated first before i setup to connect to the internet. So i don't think firmware issues.

Using branded factory-terminated CAT6 or self-clamp CAT6?

Check your router settings whether that port is set to auto or 100 mbps. If auto or 100 mbps, try change it to 1000 mbps. If router's port setting is correct and you still have the issue of 100 mbps connection. Try to check your NIC for your desktop or laptop, set it manually to 1000 mbps. It should immediately take effect of your changes. If not, try reboot your laptop/desktop. If still got problem, change the cable with new CAT6 cable and see.

Sometime after upgrade router/switch firmware, it will auto downgrade the speed to 100 mbps. You need to set it back to auto or 1000 mbps.

Try a 30/30/30 reset on the router.
Have you check inside the router advance setting if you can disable auto 100/1000 negotiation and force to 1000 mbps only?

Pai, I'm using AX 6600 had the same issue as I use the 2.5 & 1 Gbps port ... Head to network and lan settings and change the setup... After I did mine , it gave me the speed I needed ... 500+ on unifi 500



This post has been edited by kezsz: Nov 18 2021, 10:59 AM

factory terminated --and I even tried with the cable that comes with the router it self -- not cable problem. And I also tried manually setting to 1000mbps in router and multiple PC/laptop still the same.


Yes I've tried changing setting but still the same. How to do a 30/30/30 reset?

what did you change? mine all 4 ports is internet.

Press reset button for 30 seconds. While holding, unplug router for 30 seconds, power on, hold 30 seconds.

ok ill try this and see. Thanks

PC direct to AX73 and you get 100Mbps?

Yes even PC direct to ax73 connection paired at 100mbps only.

And your PC 1Gbps port is working fine on other network? Just want to make sure the problem is not on the PC side.

yes working fine with other network 1.0 gb diff location. All fine.

how many computers you tested, only one?
have you tried manually setting the speed to 1gbps?

Suspect the router settings. Try reset it and reconfigure it step by step.

https://community.tp-link.com/en/home/forum/topic/270754
After looking thought tplink forum, alot of user have this issue on different devices.

This post has been edited by ihavenoidea: Nov 20 2021, 11:23 AM