Archer C6: Multiple issues with 2.4 Ghz wifi
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This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Greetings. I recently bought an Archer C6 (US) v2 router. I am facing multiple issues with the 2.4 Ghz wifi network. First I will detail out the network:
DSL splitter --> DSL Modem --> Archer C6 router
DSL Modem: is configured in bridge mode and has only one device connected to it i.e Archer C6.
Archer C6: is configured with internet connection type PPPoE. Two wired devices are connected, PC (on LAN1) and IPTV (on LAN 2). Both 2.4 Ghz and 5 Ghz wifi are enabled with most devices connected to the 2.4 Ghz network. Smart connect is Enabled.
Problems:
1. All devices connected to the 2.4 Ghz network will not be able to connect to it after some time. Usually this happens when we wake up in the morning which is to say after long periods of inactivity on the mobile devices however the devices can loose connectivity at other times too. When this happens, in the wifi settings (android) it shows "Obtaining IP address" but it never connects. The device connected to the 5Ghz network does not face any issues.
- What I have tried already: Resetting the router, turning the smart connect option on/off, disabling 5 Ghz network, reinstalling firmware.
- What temperorily fixes the issue: Restarting the router, changing any random setting in the wifi settings on the router and pressing save button.
2. Sometimes the devices connected to the 2.4 Ghz network are not able to access the internet. The internet works on PC (connected through LAN) and also on 5 Ghz network at the time when 2.4 Ghz devices are facing the issue. Disabling and re-enabling the wifi on mobile device fixes the issue.
3. The DHCP service always provides the same IP addresses to the connected devices (for example: Cellphone 1 with mac address xx-xx-xx-xx-xx-xx will always get 192.168.0.119). Restarting the router, resetting the router, disabling wifi on the connected device etc etc does not change the IP. Is this normal behavior? Shouldn't the DHCP provide random IP addresses everytime?
4. Enabling the "Local Management via HTTPS" option shows "invalid security certificate" error (pic attached).
Note: The only setting I changed related to DHCP is the Lease time (1440) but if I remember correctly I faced the issue even when it was at the default value (120).
Internet: I have a 15 Mbps ADSL connection.
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Hi,
i think it`s normal, when you get the same ip adress from dhcp, because the device is asking the server to re-use its old ip adress, if the device was not powered off.
When the device comes up it asks the server for the IP. And the server decides which IP to give. When the specific device was connected in the past, it`s a good decision when the DHCP server gives the last known IP of the device, doing so if the last IP is avialable.
When you reboot the C6 it is normal that it gives different IP`s.
Hope this helps you a bit.
Best Regards
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Thank you for responding. Apparently no matter what I do I always get the same IP addresses. Restart the phone, restart the router, forget the wifi network on the phones or even reset the router etc etc. Always the same IP address. I thought this was weird but tplink guy in this thread (kevin_z) said it was normal. This is strange.
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In the user interface of the C6 there are options for WIFI under advanced / system parameters in router mode.
One parameter is for the groupkey. It is specified in seconds. After the set time, the Groupkey key is renewed for all WiFi clients.
You could set an hour for testing there and see if your clients can do it.
And above all, see if your bug is still coming.
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It is set to 0 currently. I'm going to change it to 1 hour as per your suggestion. I'll post the results afterwards.
Thank you.
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Apologies for super late reply. No, it did not work.
This is an issue that is present in TP-Link firmware and many different models are affected by it. The forum is full of threads on these issues.
I should point out that TP-Link released a firmware update for Archer C6 (EU Version) that is supposed to fix this issue. You can see the details in the following thread:
https://community.tp-link.com/en/home/forum/topic/165494
@Kevin_Z when will TP-Link release the same firmware for Archer C6 (US Version)? You have ignored this thread long enough. Now please provide an answer. Thank you.
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@Muni I fixed the issue by changing the settings on 2.4 Ghz as follows (not sure which change actually works around the bug):
- Set channel width to 20
- Set channel to 11
- Mode to 802.11/n only
- Security Version to WPA2-PSK
- Encryption to AES
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