Yep. The complicated answer to this one is really complicated, so I don’t go there in this forum.
But the simple answer is really simple: many routers can setup what is called “local IPv6” which lets that router use IPv6 addresses for the devices in your own home. You just can’t go out to the Internet with those addresses.
I would ask eero support – – you said you had an eero, right? They should know.
Nope, work like a charm.
The manufacturer’s decide which network protocol to implement for their devices. For example, the Eve Energy Matter Smartplug is a mains powered device that uses Matter over Thread. I wouldn’t be picking a device based on Thread vs Wi-Fi. I’d select a device that meets my usage needs and has good build and reliability.
I have an eero 6 which came with my internet package and I just looked at the settings and IPv6 was already turned on. Idk if that is just how the router comes or if it means my service provider does use IPv6 and I don’t know how to check if it actually does besides calling customer service. I was assuming they didn’t purely based on a reddit post
This.
The only times you really need to take protocol into account are:
calculating probable battery life
making sure you have enough repeaters to support the battery powered devices you will get. For example, if all your mains power devices are using Wi-Fi, and you want to add some battery powered zigbee devices, you’re going to need to get a few mains powered Zigbee devices to strengthen the mesh.
probable range to the next repeating device. Usually only comes up as an issue when you have outbuildings.
Have you looked at the wireless range and repeaters FAQ yet? Start with post 11 in that thread, read it, then go up to the top, and read the whole thing. it applies to zigbee, zwave, and thread. This link will take you directly to Post 11.
You check by going to that Google link that you already tried.
That indicated that you don’t have IPv6 service from your Internet provider, or at least you don’t have it turned on. But your eero might still support it locally inside your own home so that you can use matter over Wi-Fi devices there. Again, eero support should be able to help you with that since they advertise their eero 7 max router as supporting matter. Ask them if the Leviton Wi-Fi over matter switches will work in your home using matter even though your ISP only has IPv4 since that’s a well-known model.
https://www.amazon.com/Leviton-D26HD-2RW-Anywhere-Companions-Required/dp/B08RRM8VH5/
That’s been my argument all along! It works fine for me also! Half of the ISPs in the US don’t provide support for IPv6 and don’t have any plans on doing it anytime soon! Im glad you posted it first, I was thinking about doing it but I didnt want JD to put me in time out 
I’ve said all along that there are ways around your ISP not providing IPv6 service, but it depends on your router.
It’s just that it’s either a super easy conversation: you contact customer support for your router and they tell you how to do it.
Or it’s a super, super super technical network management conversation, and I just don’t like to get into those in this forum. 
Maybe half by the number of business offices, but the top 25 ISPs in the US by membership all provide IPv6 support.
Most of the resistance to IPv6 has come from businesses that run their own networks, and just don’t want to deal with the level of change required.
I’m dumb I completely forgot that I already tested with that link and found out I don’t have IPv6 lol my bad. My eero does have the option to turn on IPv6 (it was turned on by default) and every article I find lists my eero 6 as a matter controller with thread border router. I don’t know if that means it will work with IPv6 locally or not though. When I get the chance I’ll call eero support and hopefully the wait time isn’t outrageous to speak to someone.
I have Frontier, and thier definitly in the top 25, and sadly no IPV6 support! Its definitly not as common as everyone thinks!
Frontier has it, but only in a few areas right now. Looks like they are expecting a wider rollout around June of this year.
So you make a good point. Even of those ISPs that have it, it doesn’t necessarily mean they offer it to every account. I do know a couple only offer it for fiber. 
Did you have to do anything special to set it up? I’m pretty positive my eero 6 supports it because for one it has the setting to turn IPv6 on and off and also because it’s listed as supporting matter as a matter controller and thread border router so I’m hoping it would be as easy set up but idk im kinda getting lost in the weeds on this topic
It’s likely that you can run IPv6 locally within your local LAN environment since your ISP router would not need to participate as you get your wireless from the eero device. If you were relying on your ISP for wireless then it could be an issue.
AFAIK, the only eero device that supports Matter is the eero Max 7. Even at that, you need another app to commission devices since the eero is only a Matter controller. I thought the eero 6 devices support native Thread and not Matter over Thread.
Most modern devices support it, and it’s turned on by default. There is nothing special you need to do to set it up on your local network! However, getting it to work over the internet is a different story altogether.
I hate the matter rollout. 
The eero six and 6+ have received a firmware update that allows them to act as thread border routers, but not as matter controllers, as you point out.
The eero 7 max will be a matter controller, and will be paired with the Amazon Alexa app as the matter commissioner.
There have been persistent rumors that the eero six will get a firmware update so it could act as a Matter controller, but apparently that has never happened and there’s no timeline for if it ever will. 
At 2 different locations with different brand routers I didn’t do anything other than pair the Matter devices with ST by scanning the QR code on the device. And it works. My Routers must have had IPv6 already enabled.
I’m so confused now. This article Every device that works with Matter (October 2023) - The Verge at the very bottom lists “matter controllers with thread border router” and under Amazon it listed the week 6. So the 6 is not a matter controller?
I was going based on this article Every device that works with Matter (October 2023) - The Verge and it lists eero 6 and a bunch of other eero devices as “matter controllers with thread border router” so am I missing something? But honestly the eero being a controller or not shouldn’t matter since I have an aeotec hub I don’t need eero to be a controller I just need it to be able to run IPv6 locally and I can use my hub as the matter controller?
What do you mean by that exactly? Sorry I’m not very knowledgeable about any of this. What would I need to get it to work over the internet for?