@Kevin_Z Thanks for getting back to me.
1. When did you purchase it, does the reboot issue occur when you first installed it or is it happening after some special activity, such as high loading or streaming? Have you ever upgraded the router firmware or changed some setting on it when this issue begins to happen?
I bought it in 2016. The issue has occurred in the last few months. I have not recently upgraded the firmware or changed any setting, although I have done both of those things in the past. There is no pattern to when the router reboots. It doesn't seem to be at times of unusally high loading. When it reboots both wired and wireless connections are broken. It is not even possible to connect to other devices on the network e.g. my PC cannot connect to my NAS (both wired connections).
2. When the C8 restarts, are all the LEDs turning off then on automatically and the internet on it will temporarily down then recover? How long does this process take?
I'm not sure about the LEDs as the C8 is in a different room to where I work. I have noticed that the LEDs are all off when the device is working. The restart does not take long, perhaps 30-60 seconds.
3. How many devices are connected to A5, wired, and wirelessly? If possible, try to reduce the connected devices, modify the Transmit Power on the router to middle or low, then monitor again.
There are about 50 devices on my network, once you include smart bulbs, smart speakers etc. About 15 of these are wired connections (through a couple of switches) and the rest are wireless. Most of these by their nature would not use much bandwidth.
4. Are there any other range extenders or switch in the network? If yes, try to remove it first and confirm again.
There are two switches and two wireless access points (connected via powerline) in the network. Both switches and one of the access points are TPLINK. I have removed the one that is not TPLINK. The issue has not been resolved by doing that.
5. Try to reset it to factory defaults by holding the reset button on it until all the LEDs go off then on, reconfigure it from scratch, then monitor again.
OK, I'll try this too.
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