Archer C5400 New firmware 1.2.5 reduce WAN connectivity from 930MB/s to 220 MB/s in 3 days
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Few days ago my router showed that there's a new versin exists (I was on 1.2.2) I updagaded and everything was fine, but I noticed that connectivity is slow, so I checked the spee (speedtest / fast.com) and saw 200Mb/s. Discussed this with provider and they told me that don't see any problem, so I rebooted the router and reboot helped.
So, seems that new firmware version has regression that cause to the router to reduce speed overt the time.
Think twice before installing it.
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Hi @Sergey_Miklukho and all,
If you have ever encountered any speed issue with the Archer C5400 V2, please ensure first you are already on the latest firmware version which can be found and downloaded from the TP-Link official website:
https://www.tp-link.com/support/download/archer-c5400/#Firmware
If the speed is still not good as compared with that you can get from the ISP modem directly, log into the web interface of the C5400 and go to Advanced->QoS, manually set the speed to that you get from your ISP, and leave QoS on Standard, then reboot the router and confirm the speed again.
However, if you still have the speed issue after the above, and you would like to install the firmware below then monitor, here is the download link:
https://static.tp-link.com/beta/2021/202103/20210309/ArcherC5400_V2_210309.zip
Let the community know if you still have inquiries, thanks a lot~
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We will do some troubleshooting and try to figure it out.
Who is your internet service provider and what is the bandwidth you paid for your ISP?
With the speed slows down to 220Mbps, please test the wired speed you can get and verify the wired negotiation speed of your computer, both wired and wireless.
https://www.tp-link.com/support/faq/2265/
Note: The steps are the same, for wired link speed, you need click on ethernet connection.
Please try to modify the wireless settings to improve the wireless performance, like wireless channel and channel width.
And please disable QoS or change another ethernet port on the modem to connect it to the C5400.
Good day.
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I'm talking about wire connection and wirelss. Wifi is disabled on that computer.
It's desktop mac and connected by wire (CAT7) to Archer C5400 wich is connected via fiber to my ISP.
The ISP (Partner ISP, Israel) is less relvant as after reboot speed is again 930MB/s.
Before 1.2.5 version that nevver happen, but it's does with 1.2.5.
Thanks
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I have experience the same issue, when I connect directly my service provider modem (Shaw Communications in Canada) I can get over 300mbps which is my plan, but through the router i get about 92mbps. I have disconnected all my other devices from the router, the router has 1.2.5 installe and still get ~92.
Thanks
Steve
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@SlavaGo EMEA support told that no such version 1.2.5 and was not professionnal at all, just said you need to recovngifure and reset router. EMEA support - shame on you.
As for that 1.2.5 - web site not saying anything about that version anything.
@TP-LINK
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I'm having the same problem and more. I had the ArcherC5400 v2.0 firmware upgrade to 1.2.5 Build 20190411 rel.52981(5553) a couple of days ago and I've had all types of speed problems. I get 100mbps from my ISP. It's all I need. Speedtest.net usually shows 117mbps download for me. After the upgrade, I am getting lower speeds that vary from 20-90mbps. I rebooted the router, no solution. I factory reset the router, no solution. I tried both wired and wireless, same thing. The worse now is that I am having to reboot the router frequently because I have a "connected, no internet" on my Wi-Fi.
I need to revert to the previous version of the firmware ASAP. I work from home and I need this to be working ASAP. If not possible to revert, I need a solution ASAP.
Thank you
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@CrisAl It's possible to revert, just download previous version from the web site.
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@SlavaGo thank you. I'm on the phone with TP-Link support for over 40 minutes now asking this simple question. I pointed them to this forum because the guy said he was no aware of this problem. I am asking repeatedly "can I just install the older version on top of this one" and he's saying, well, let's see, let me ask you 1000 more quetions
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@CrisAl well I was in email discussion with them and they sent me some previous version to fix, wjen6I pointed that problem with 1.2.5 and not with 1.2.2, they were surprised that there's such new version. Anyway I downloaded 1.2.2 from the web site (choose right hardware revision) and downgrade from the router.
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@Kevin_Z , these are tests you should do before you release a broken firmware. Not the other way around, where you release a bad firmware, them ask customers to use their time (which to many of us = money) to troubleshoot the problem you created. QA your software! Test the hell out of it. Your company's bad firmware just cost me over $1,000 in time wasted with your bad firmware problem when I would be charging my clients for my time while working, since I am a consultant.
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