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After some time, one 5GHz device cannot access web page of another 5GHz device

After some time, one 5GHz device cannot access web page of another 5GHz device

After some time, one 5GHz device cannot access web page of another 5GHz device
After some time, one 5GHz device cannot access web page of another 5GHz device
2024-12-15 16:25:41
Model: Deco XE75 Pro  
Hardware Version: V3
Firmware Version: 1.2.11

I have a strange problem and I am not sure it is isolated to Deco XE75 Pro, it could also be related to Omada ER605.

 

I have Omada ER605 router set up as the main router and DHCP server. I have two Deco XE75 Pro set up as access points. There is a 5 GHz network and a 2.4 GHz network set up with different SSIDs.

 

I have two 3D printers running Klipper firmware, Moonraker software, and Pi OS Lite on two different Raspberry PIs: one is Pi 3b with only 2.4 GHZ wifi and the other is Pi 4 with 5 HZ wifi. I access these 3D printers over the local network using their static IP addresses.

 

What happens is that after some time I cannot access the Pi 4 printer (connected to 5 GHz network) from any 5 GHz device. It happens after some random amount of time of network running normally. I can access the same Pi 4 printer over LAN and I can access the Pi 3b printer (connected to 2.4 GHz network) from either 5 GHz device or LAN. I also have OpenVPN set up and if I connect over mobile network over VPN, I can also access the Pi 4 printer. But unless I reboot the Deco XE75 Pro, I will never be able to access the Pi 4 from any 5 GHz device.

 

Why is this happening? What can possibly prevent devices on the same wireless network (only 5 GHz) not to be able to connect to this device while LAN and 2.4 GHz devices work? Is this something to do with ER605?

 

To clarify, if I simply reboot Deco XE75 Pro, it all works fine. I don't have to do anything to ER605 but only to XE75 Pro.

 

What is also strange is that the same issue used to happen with my very old WDR3600, except that with that device I could not access the same printer even over VPN (could still access over LAN). I would have to reboot WDR3600 and then all works ok.

 

Can anyone help fix this issue?

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#1
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3 Reply
Re:After some time, one 5GHz device cannot access web page of another 5GHz device
2024-12-17 03:18:31

  @pajtaz 

Hi, Thank you very much for the feedback.

Can you still ping the IP address of Pi 4 on any of the 5GHz mobile clients when they can't access the 3D printer?

 

I can't think of reasons for which might be relevant. If the issue can't be constantly reproduced, I think it would be difficult for the senior engineer to locate the root cause.

If possible, when the same issue is repeated, please don't reboot the Deco XE75 Pro and try to save the system log(Deco web interface login) and contact support.forum@tp-link.com as soon as possible.

 

Best regards.

 

▶Check What's Currently Going on With Deco ▶Deco Starts Supporting Changing Wireless Channels! ▶KidShield Now Open for Trial! Try to leave a Message if urgent help is required.
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#2
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Re:After some time, one 5GHz device cannot access web page of another 5GHz device
2024-12-17 08:45:38

  @David-TP I cannot ping the Pi 4 from any 5 GHz device.

 

As this used to happen with WDR3600 and now with Deco XE75 Pro, this is something to consider in the investigation. They are both TP-Link devices, many years apart, both wireless routers and both used only as access points and yet similar issue used to happen with WDR3600.

 

I will keep checking the access from 5 GHz devices until it happens again. I will then capture the log and contact support as suggested. I will also post it here.

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#3
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Re:After some time, one 5GHz device cannot access web page of another 5GHz device
a week ago - last edited Sunday

  @David-TP it has happened again and there is even more bizarre behaviour.

 

This time the exact same device (3D printer on 5GHz network) could be accessed by any device on local network - ethernet, 5GHz, 2.4GHz. However ... I could access the device over VPN! I use OpenVPN on ER605 and I disconnected the wifi on my mobile phone, connected over mobile network over VPN to my network and I was able to access that 3D printer. After reboot of Deco I can access the device again from all other devices.

 

Only common thing to that 3D printer 5GHz device and all other devices on the network trying to reach it is the Deco XE75 Pro.

 

Additionally, I am having the exact same issue as here and I posted there: https://community.tp-link.com/en/home/forum/topic/674996?replyId=1468476

I am not sure if the two issues are related.

 

I would give you the logs but I have since rebooted Deco XE75 Pro several times trying to solve this time update issue. I had no success. It is also bizarre that the other Deco XE75 Pro which is not "Main" Deco has correct time. I also see huge list of people with exact same time update issue and same errors "ntp check error" but no clear and definite fix if using Deco as access point.

 

EDIT: I also cannot check for firmware update on the app. When I click on "Update Deco" on the app, same error comes up, "Unable to check for update". This is getting a bit silly, I am considering returing Deco's if they will continue to act like this.

 

EDIT 2: I have even more good news. I cannot access Deco Main web UI over VPN but I can access the other Deco which is not main. I also cannot access Deco over VPN when using the Deco app, it says device is offline. Seems both issues are related. Just strange things.

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Helpful: 1

Views: 106

Replies: 3

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