Problem: After 6 months of perfection, Eero stopped connecting to Consolidated Communications Inc (CCI) fiber

Same exact setup and issue here with consolidated. Consolidated told me they have had many calls from eero customers. I did get one eero support person to tell me they were aware of the issue over the phone but I would have to wait for the next update to see if it gets fixed. Support over email has been terrible. 

I just got this problem today as well. Luckily I still have the original router that Consolidated provides, so somehow managed to fix it ny the method described above. If Sidney is able to guide as well, it would be highly appreciated.

Having the same issue here. Double nat is working, but isn’t a great solution

Sidney any guidance?

I spoke to Eero just over a week ago further trying to resolve this. Long story short, a dude from CCI came out and has seen this issue multiple times between Eero / CCI. He was POSITIVE its on Eeros end and I believe him! He has been able to troubleshoot onsite and is 100% confident the Eeros have somehow stopped attaining an IP address due to firmware issues, not CCI

After speaking with Eero again, they raised the ticket to the next level and said they will contact CCI. I haven't heard anything back.

I’ve had the same Eero CCI issue. I know at least since May 21. I had CCI out after Eero also said it was an issue on the CCI end, but when they arrived everything worked and when i plug Macbook directly in I had great speed. CCI phone tech told me before scheduling tech visit that they doubt it was going to fix the issue because they we seeing this with other Eero owners. After hours on the phone with Eero it was sent to the “escalations team”. I’m also running double nat waiting on an Eero fix. I reached out again June 9 and on June 11 was told still with engineering team. Last I’ve heard from Eero. Seems we may be a “small issue group” with no real concern for resolution.

Any update on this? Had the same problems at my parents I was originally told from eero (took 1hr20min to get to a tech that Consolidated switched to PPoE (even though it's still DHCP to my ASUS) and that's why this is happening. It's been double NAT since and would love to get back to the way it was.

I have the same problem. Happened weeks ago. Tired of calling eero support. I hate having to connect to a router first  then to the Eero. 
This morning my brother in law called and told me he had the same problem. 
Anybody have a fix? Anybody heard from Eero yet? 

Does anyone have a recommendation for a great router to use with CCI and Eero? I'm not a fan of renting them. I am starting to think I may need to go buy something else since the older router I have borrowed is very slow speed.

I have the same problem. EERO only works in double NAT configuration. To make matters worse, I rely on the Connection for phone service so I can’t be on the phone eero tech support while working on the problem. 

I received a call from Consolidated Tech out of the blue yesterday, August 19, to update me. Impressed since it was three months ago they came to the house to assist in troubleshooting and I have not considered contacting Consolidated since. Double NAT was their recommendation until Eero makes a firmware change related to the DHCP issue. Consolidated said they have been working with Cisco, Eero, and other ISPs and have come to the conclusion it is the Eero software/firmware that is causing the current conflict.

In disappointment, Eero has not responded to my email requesting an update to the open ticket in over a month. I ended up connecting on Eero Twitter Support and received a response that it is still a problem and use double NAT.

Ah this is great to hear

I need to find out where to send my invoice for the router I had to buy for a double nat. :)

This sounds like the exact same issue I have with Telus fiber. I had to put the eero behind the Actiontec t3200m router and only then would it work.

I registered just to post in this thread.  I received my Eero Pros yesterday and I am also on CCI with their 100Mb service.  My previous setup was a TP-Link Archer C9 router and a couple wireless extenders.  I had 7 SSIDs to cover my house/yard and couldn't wait to consolidate it into one network.

First off, and not really relevant to the OP, but worth mentioning, the Bluetooth pairing/set up didn't work at ALL.  I sat there for probably an hour re-trying it and letting it sit forever.  Just got the spinning loading wheel the whole time.  I got a 3-pack of Pros and tried them all; nothing.  I was so annoyed and ready to return them at this point.  Thankfully out of desperation I tried to disable Bluetooth on my phone and a button magically appeared that let me set it up by entering the serial number manually.  Why that option didn't exist with BT enabled, I have no idea.  That needs addressed because I was real close to returning my units at this point.

More to the point of the OP, once I got the gateway node set up, I received the same exact issues:
Eero Pro detected - OK
Where is your Eero Pro -- OK
Connecting to the Internet - OK
Registering your Eero Pro -- "We're having a problem" or something similar.  No error message about not being able to see the internet despite progressing past the "connecting to the internet" phase without issue.  It should have thrown an error at that point, but I'm guessing it doesn't actually try to hit the internet until it gets to the registering phase, for some odd reason.

I sat there for probably another hour trying to figure out what the heck is going on.  It wasn't until I found this thread via google search that I tried putting my original TP-Link router in between my incoming connection and the Eero gateway with wireless radios disabled.  Boom, magically worked.  This is super annoying, because I went from having a single router to having a TP-Link router, an Eero Pro, and a gigabit switch hanging off the Eero since it only has 1 output connection.  I was trying to clean up my setup but made it way messier with more cables.

I'm hoping this is resolved via Eero firmware, since it seems to be an issue on Eero's end, but seeing as this issue has persisted for 6 months, I'm not hopeful at all.  Especially since it seems to only be an issue with CCI, which I'm guessing is a tiny tiny fraction of it's users.  This is a really annoying workaround and I'm really disappointed.  If I didn't find this thread, I would have been returning my 3-pack today for sure.

Thanks for the picture and information. I will see if I can find the battery, my ONT is different.

I just purchased the eero 6 pro as an upgrade to my orbi since I have gigabit from CCI. I spent 4 hours today trying to get it to work. Called eero first and got a rude CS which pretty much told me I am screwed. I call back and the other CS person was very helpful but still didn't fix the issue but gave me some information to call CCI with. He walked me through pretty much the steps listed above. Super disappointed and believe this is something to do with the eero unit and not my ISP. Not the experience I was expecting with $600 router. Time to return them. I really wanted them to work.