Arris NVG599 Passthrough Setup for Eero Pro 6E

I do not think there is anything wrong with your setup.  I think it is functioning properly.

Yes, in the Smart Manager, it would show 99 sometimes.

I'm not sure what question the "Yes" is to, or what "show 99 sometimes" means.

I don't think that Smart Manager is able to see the Eero gateway. 

The Smart Home Manager shows my router labeled as "passthrough" in the list of connected devices.  That's about the extent you should expect to see it.  I'm not sure what more you're looking for.

Maybe the "Yes" was directed to one of the two following questions, but if so, it didn't answer it.  Please provide more than Yes or No, explain how, when, etc.

Have you, ever, using any mechanism, gotten a download rate of more than 24 Mbps from this site?  How?

Have you ever tried downloading a Linux system image ISO, or a Windows image ISO just to see how fast that goes?

Smart Home Manager is only able to test the gateway when it is the NVG599 doing the routing and not in IP pass-through mode.  When the NVG is in IP pass-through mode, Smart Home Manager gives the error that it can't.   The reason I presume is that, the NVG 599 is on the 192.168.1.X network and the Eero is on the 192.168.4.X network.

Wi-Fi gateway speed

Hmm… something went wrong. Wait a few minutes and try again.

It is probably an issue in how the NVG599 handles the Smart Home Manager request to do a speed test when it has an IP Passthrough host.  My BGW210 can do the speed test even though I have an IP Passthrough client, and that's the way it should be; the Gateway speed test doesn't involve the IP Passthrough client.  The IP Passthrough host would be in line of the client speed test, but largely transparent.

Can you arrange your speed test results in some sort of table that makes it clear what you did and what your results are... I'm a bit lost.

Really, no results are needed as every single setup results in the same slow actual download speed.

No Eero at all.  NVG 599 set to modem/router and gateway; Ethernet only connection to NVG 599. 

Internet Speed Test – AT&T Official Site (att.com)  Device test: ?  Download     Gateway NVG 599 test; 105 mbps

Xfinity.com   test site:     56.1 mbps

Actual real-life download speeds  25-26 mbps  measured with Windows 10 in Windows Task Manager;  Microsoft Edge; Google Chrome; 4K Downloader.  Downloads measured:  Windows 10 .ISO from Microsoft on both Chrome and Edge;  Ubuntu Linux setup download;  Youtube video via 4K Downloader.

Real-life downloads measured at 25-26 mbps in those programs and in Windows Task Manager.

Basically, when the Eero(s) are hooked-up and running as the router and gateway, I get the same results as above.

I'm not certain if I need to change any settings on the NVG599.

Some things in the NVG's firewall are turned on. Also, it gives out its own IP to itself.  It is also listed as DNS server and not the eero.

I'm not sure what else to tell you.  There's not a whole lot of settings to tweak, etc. that will increase your performance, but there are settings you can change so that it doesn't work.

The NVG599 is not a new Gateway, but it's quite capable of 100 Mbps. Your line is capable of 100 Mbps. 

Wait a minute... new idea: Check your PC for any software installed that looks or smells like a "Network Accelerator," "Quality of Service" or similar software.  What brand PC, or motherboard and/or what is the description of the Ethernet Interface?

It seems to be working well now with 95.00-99.99 mbps  downloads, except for Youtube downloads with 4K Video Downloader.  I can download Facebook videos at the 99 mbps now too with 4K Video Downloader.

So someone is throttling my connection to Youtube.

Ahh, did it just start working or did you make any changes since your last post?  What about things like big ISO's and such?

YouTube may be limiting download speeds to what is necessary to view them in real time in an effort to prevent downloading, or at least having bandwidth consumed by downloaders in excess of their "fair share."

But like tonydi, I want to know: What changed for these others?  Did you do something?  What?

I didn't change anything.  

Tested:   Nvidia GPU driver file of about 800 Mb.  

No VPN:   25 mbps download rate.

       VPN  90-103 mbps

Last night, after doing tests with and without VPN a few times of the same download files above, the non-VPN download rate went to 99.99 mbps, which matched the high VPN connected rate.  I thought that somehow that fixed it.

Today, I tested again and the non-VPN download rate for those same Nvidia, Mint, and Ubuntu files, are all back down to 25mbps, but on VPN, they go to even as high as 103 mbps. The average rate for the length of the downloads over VPN is probably 90+ mbps.     Non-VPN rates, are 25 mbps.