Philips Hue bridge suddenly stopped connecting

[smac1]

My Hue Bridge was working for about 2 years. One day I found that I couldn't connect it. Looking at the device I can see that the third light (internet) is off, and it doesn't show up in the Hub 3's list of connected devices. I've tried various things:

• Power cycling the Hue and the Hub 3
• Factory reseting both devices
• Running the Hub 3 diagnostic tool
• Switching ethernet ports
• Assigning a static IP to the Hue Bridge

Interestingly, if I run the Hub 3 diagnostic tool, the following happens:

1. "Philips-hue" reappears in the list of connected devices.
2. The 3rd light (internet) is now on and solid
3. As soon as I use the Hue app to try and connect to it again, the device is booted off the Hub3's devices list.
4. At which point the 3rd light turns from solid to blinking

[JRH2020]

Hi, did you ever resolve this?

[legacy1]

If it don't work with the hub in router mode use modem mode and get your own router with 1Gb ports.