Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use

Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-03-28 22:48:10
Hardware Version: V2
Firmware Version: 1.2.2 Build 20170912 rel.56240(5553)

I'm having a very weird issue with this TP-Link Archer C5400 v2.0 (Firmware 1.2.2 Build 20170912 rel.56240(5553)) router. 

 

After a couple of hours of normal use, the router kills any connectivity (LAN and Internet) when using the second 5ghz band. It will still show up but it will reject any connections (apple devices will even complain that the "Entered password is incorrect."). When this happens I have to switch to the other 5Ghz band connection and turn off and on that second band. Then it will stay fine for a couple more hours, and back to the problem. 

 

I've tried everything. Hard reset, different configs, made sure QoS wasn't messing with anything. I even made sure the Time settings were correct with the proper local ntp servers. 

 

Nothing. The problem keeps coming back and I'm out of options. It definitely looks like a bug somewhere because turning the wifi setting for that band off and on, and hitting save, makes everything work again for a couple more hours.

 

I don't know if this problem existed before or not in my router, because I used to have a very stable wired connection, so never really used the wifi. Now I'm in a different house (and different country) and wired connection is not an option.  What strikes me as odd is that this behaviour doesn't happen on the other 5Ghz band or the 2.4Ghz one.

 

Another thing I've noticed (which is probably because I'm pretty ignorant in this area) is that the first 5GHz band gives speeds of 150 Mbps / 50 Mbps whereas if I'm in the second 5Ghz band I'll get speeds of 500 Mbps / 50 Mbps (which is my provider's speed, so that's the expected result). 

 

Any help or pointers are much appreciated. 

 

Thanks!

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#1
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12 Reply
Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-04-01 06:05:35

Hey, seems that there are something wrong. You may need contact the tech support to check the warranty.

https://www.tp-link.com/en/support/contact-technical-support/#Hotline-Support

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#2
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Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-04-01 06:33:10 - last edited 2019-04-01 06:35:17

A bit of an update here: it looks like I was having a double NAT problem in my network caused by my provider's router (an Arris one), it looks like that was enough to bring down the second band for some reason.

 

Given that I cannot put the Arris one into bridge mode (you have to actually call the provider to do this :/ ), I've put the TP-Link one and reconfigured my network. It now looks like everything is fine.

 

But, now my TP-Link is just an expensive bridge. The first 5Ghz band and the second one have very different speeds (still getting around 100Mbps/40Mbps on band 1 and almost 500mbps/50mbps on the second one)

 

I'm not satisfied with this new network config given that I don't really have control over the Arris router, so I'll contact my provider next Friday so they put the router in bridge mode (and reconfigure my whole network again yay!)

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#3
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Re:Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-04-01 06:57:13

pablitt wrote

A bit of an update here: it looks like I was having a double NAT problem in my network caused by my provider's router (an Arris one), it looks like that was enough to bring down the second band for some reason.

 

Given that I cannot put the Arris one into bridge mode (you have to actually call the provider to do this :/ ), I've put the TP-Link one and reconfigured my network. It now looks like everything is fine.

 

But, now my TP-Link is just an expensive bridge. The first 5Ghz band and the second one have very different speeds (still getting around 100Mbps/40Mbps on band 1 and almost 500mbps/50mbps on the second one)

 

I'm not satisfied with this new network config given that I don't really have control over the Arris router, so I'll contact my provider next Friday so they put the router in bridge mode (and reconfigure my whole network again yay!)

Oh, really. Maybe the double NAT affects the performance. What is the model number of the arris modem?

 

Back to your case, per you said, contact ISP to make the arris modem bridged and check whether it works. 

 

For the speed issue, have you ever tried to change some wifi settings? Like channel and channel width?

 

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#4
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Re:Re:Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-04-01 08:18:32

Yes, not only double NAT was affecting the performance, but it looks like this also brought down the second 5Ghz band (and for some reason only the second band).

 

It looks like the problem on the speed for the second band lies in the combination between the Channel Width and the Channel number. After testing different combinations, Width Auto and Channel 161 is giving me the proper speed (I got 492Mbps / 50Mbps).

 

I fear the same thing is happening to the first band, testing different combinations of channel width and number is giving me different speeds (I just got 337Mbps/50Mbps, which is quite the progress from the 100Mbps / 50Mbps I was getting before)

 

I’ll keep trying combinations, this area is very crowded in terms of wifi signals and the amount of channels is limited :) 

 

I'm definitely calling my ISP today, I don't like not being able to control my own network.

 

 

Thanks for your comments and suggestions!

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#5
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Re:Re:Re:Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-04-02 06:21:46

haha, surely do.

 

 

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#6
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Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-11-05 10:25:01

@pablitt - I get similar problems with my Archer C3150 V2 - after 24hours or so, the speed of my 5Ghz band drops and then both bands stop accepting any new connections - The firmware is nearly 2 years old despite having only bought the router 4 months ago.  Overall I like the router, but it DESPERATELY needs a new firmware release to address some quite deep seated and fundamental issues.

 

I like TP Link products, but the on-going support is really poor

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#7
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Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-11-07 08:25:35

@Danny-T 

 

Thanks for your reply. 

 

What is the current firmware version and country version of this Archer C3150? 

 

Have you ever tried  to change the wireless settings of 5GHz to optimize its performance? 

 

Besides, any error message indicates that  they cannot connect to the 5GHz? And what about the performance of wired connection and 2.4GHz? 

 

Good day. 

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#8
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Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-11-07 09:48:58

@Kevin_Z 

 

Hi - Thanks for the response:

 

Firmware is Archer C3150(EU)_V2_170927 and I am set for UK

 

Symptoms - I use TP Link range extenders and they lose connection to the 5Ghz signal after 48-72 hours.  I have positioned them carefully and after a reboot the range extenders say that the signal is good but over time the 2.4 band stays ok but 5Ghz drops out and won't reconnect.  Reboot the router and all is good.

 

In similar timeframes devices stop being able to connect, with IOS devices saying that the password is incorrect.

 

After a reboot and for around 24 hours my network is great, but I need to reboot twice a week.  I use all the standard settings for wireless

 

Thanks

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#9
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Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-11-08 08:46:30

@Danny-T 

 

The current firmware is the latest one already, when the TP-Link extender lost 5GHz connection, can you get internet from the Archer C3150 by 5GHz? In other word, do other wireless devices which connect to the 5GHz of the Archer C3150 works fine? 

 

Try to modify the wireless settings of the Archer C3150, like wireless channel 36/40/44, and channel width 40MHz. 

 

Please ensure that the firmware of the extender is up to date and please tell us its model number. 

 

Try to move it closer to the main router or reserve a static IP for it on the C3150.

 

Besides, when did you buy this Archer C3150?

 

Good day.

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#10
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Re:Archer C5400 2nd wifi 5Ghz band dying after a couple of hours of use
2019-11-08 10:19:47

@Kevin_Z 

 

So... Bought 4/8/2019 from Amazon UK

 

Range extenders

WA850RE V5 - Firmware Build 20181107

RE305 V1 - Firmware Build 20181026

RE450 V2 - Firmware Build 20171220

 

All up to date as far as I am aware - These all connect directly to the C3150, I don't daisy chain - the C3150 is in the heart of the house and the Range extenders are 'spokes'

 

I will try changing the settings as advised

 

Thanks for your help.

 

BTW - are there plans to upgrade any of these Firmware builds?  While I am happy to try and resolve the issue in config I would like to know that a proper solution is in the works

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#11
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