I have Eero pro6 mesh with 4 routers. I have 3 Nest learning thermostat. Initially 2 were registered to my app. When I wanted to add the 3rd one, it would not be able to find an assisting device. Called tech support who deleted my earlier two to start again. Now the 3rd one got registered but the first 2 can't.
Following is the follow up email (difficult for me to follow and make those changes):
It was nice to speak with you today. As discussed, when adding additional Nest devices, make sure your router supports multicast and that it’s on. Nest devices use multicasts to communicate and set up connections with other Nest products. Check if your router has wireless isolation settings turned on. This will prevent devices on your network from connecting to other devices in your home. I suggest contacting your ISP to check all the settings of your router. Have a nice day!
Here are the most important recommended Wi-Fi network and router settings for use with Nest products. For more details, refer to the sections below.
- Enable 802.11 b/g/n if you have an 802.11 ac router.
- Set your Wi-Fi router's DHCP lease time to at least 2 hours.
- Turn on your router's Power Save Mode (PSM), if you have a Nest thermostat.
- Enable IPv6, if you have a Nest Protect.
- On your Wi-Fi router, turn on multicast, if you're adding additional Nest devices.
