Baldcoder, you're 100% right, that there are "a few things that won't work in this configuration". Depending on your setup (specifically related to DNS management), what features do, or do not work may actually be non-deterministic.  If you are relying on eero for it's paid security features, you may be in for a big surprise when (for example) a parental owned device has adult content filtered, but child owned devices do not. 

I went into some detail on what how I added a middle device, AND a middle eero, to ensure there was deterministic behavior in https://community.eero.com/t/m2mjka?r=x2hzl4l . If I were to do it all over, I probably would have avoided eeros due to the lack of this feature. And while eero's support (and warranty) has been pretty amazing in regards to every other inquiry I've had, including a request to re-enable replies to this thread after it was locked (the thread was so old it was caught up in an internal tool and closed), eero's no-comment response on this thread is very disappointing.

kevindurdle Their refusal to comment on PPPoE is very concerning. It makes me wonder if they do actually listen to their community of users or are only implementing features they want. This request has been open 4 years with other 250 responses and not a single bit of information from the eero team.

MrDoppler It's not coming anytime soon.  They've tried, it kills performance.

txgunlover Nonsense. Every other major competitor manages to support PPPoE fine — Google, both in the form of the Google Wi-Fi or newer Nest Wi-Fi variant, Linksys' Velop, and the Netgear Orbi. Indeed, I have used routers a decade and a half ago that supported it out of the box.

This isn't exactly a fringe request, and it would be nice for Eero to acknowledge if this is even on the agenda, *four years* after this feature was originally requested. Perhaps it was a niche demand prior to wider international availability, but the Amazon UK product listing, as well as a few random Reddit posts show concrete examples of people purchasing, then returning the hardware once they discover this limitation. However, I've just found this, which gives me some hope!…

https://www.reddit.com/r/eero/comments/mcktil/pppoe_support_in_2021/

jaffa jaffa Pay attention to this one, she's the lead dev:

6roybatty6

Developer eero Mesh/OS18 days ago

Egress vlan tagging is much easier to implement and get good performance on than PPPoE, though. (We'd just program the ethernet switch that's inside every eero to do it. Doing PPPoE is much more complicated.)

danstratton Something else is wrong with your configuration... distances between eero's cables, etc... I regularly get 650+ wireless and 950 down wired.

txgunlover Spent plenty of time on this with eero, very disappointed with the service and routers. Spent a ton of money to upgrade and suspect it’s the needed double NAT, since they don’t offer PPPoE. I’ll never recommend this product to anyone. Expensive Cr*p.

danstratton I had a similar problem. Wired gigabit throughout house, yet eero wireless network was ~100Mbps. Then I realized my gateway eero was next to my toaster. Moved my toaster over a bit more to the side and problem solved. Still a pain in the butt to have my eeros in bridge mode, but at least my speeds are on point.

I've a similar problem. Wireless devices get ~350mb/s, wired devices into my PPPoE router get 980mb/s, wired devices into the eero (with a dumb switch in the middle) are limited to 180mb/s. I'm assuming it's the double NAT killing things, somehow. I might bounce something onto support too. 

danstratton I agree.  I currently have an intermediate router connected via PPPoE and my speeds are exactly (if not a little better) than what I'm paying for from ISP.  So I don't see how adding PPPoE to Eero devices would kill speeds, unless they implemented it incorrectly.

Kora (eero Support) I don't know where you got the idea my speed had improved over time, they have not! Speeds on the eero network have never achieved near what I would expect - wireless runs around 90 Mbps (5 Ghz), the any faster speed I've observed is my desktop that is wired directly into CenturyLink's modem and it runs 900 - 940  Mbps consistently. eero is the bottle neck. Of course eero gives the false impression (within the app) that my speeds are 940 Mpbs, they are not! I've spent HOURS with your support people to no avail. I can only believe it is a double NAT problem and the only solution is a network that supports PPPoE. I feel I have thrown away $500 on this system!

PPFS Yes, but VLAN not supported on original  eero!  The thin edge of the wedge - how long before the original eero is sidelined and no longer supported?

RadBenC Plume's SuperPod with WiFi 6 supports PPPoE.  They aren't cheap, but at least they support it.  I'm thinking of switching.