Upgraded Orbi router - CenturyLink can no longer connect

What brand and model is this laptop that your using with speed testing connnected to the 960? 

What CAT# LAN cable are you using when connected to the 10Gb and 2.5Gb ports? For good connection and performances, CAT6A STP is recommended, not UTP cabling. 

What brand and model ISP ONT is the RBR connected too? 

I'm using a MacBook Pro 2020 (M1 Model). The cable says CAT6 UTP. I can use the same cable on all Ethernet ports on the RBR850. 900MB or more down all the time every time. No lag. No issues.

But bring the 960 in and I can't even perform a speed test from LAN ports 1 and 2 on the 960. I've attached a screenshot of the error message I get from speedtest.net. Same message every time. It takes about 60 seconds from when I click the GO button for the test to even start. It's usually instant on the RBR850. Plugging my laptop directly to ports 3 and 4 I can get a connection but speeds are abysmally slow.

I can try and order the cable you recommend to see if that helps. The RBR is connected to a casa fttdp box in the closet. 

https://www.casa-systems.com/products/ntd/

Something to gather for NG support if your support ticket is still open, take a debug log capture while the 850 is online. 

Then put the 960 online and take a debug log capture there. Ensure the WAN/LAN option is enabled on both. 

Send these off to NG support. 

Seems like if two different 960s are having same issues with this ISP ONT, possible there maybe a problem between the 960 and your ISP ONT. Something else to try, take the 960 over to a friend or family members place and see if the problem follows. Would be telling.

I just connected my 960 up and ran the following from a Windows PC and Mac Book Pro 2018 connected to the 2.5Gb LAN port, No LAG enabled:

Mac Book Pro 2018 connected using 1Gb USB to Ethernet adapter connected to 2.5Gb LAN port:

So I bought some Cat6A STP cables. Issue still persists. I plugged into Ports 1 and 2 and speedtest.net test failed each time and I got socket error. Trying to browse the web hard wired is extremely slow. A simple Google search takes about two minutes to load. Plugged into Ports 3 and 4 and no issues.

So ethernet connected to ports 1 and 2 you have problems and then plugging into ports 3 and 4 on the RBR you don't have problems and things are good? 

Two different 960, both with bad ports, seems unlikely.  I suppose it could happen if a bad batch got out.

I would test those same ports with a different device/computer and different jumper cable.  In fact, I'd use the plainest old CAT5e cable you have or even CAT5 if you have any relics.  And I say that because in my testing, short patches don't really matter.  I have used 10' CAT5 cables from the 90s as a test and they work fine.  Even the cable that comes in the box with the 960 is only CAT5e.  At any rate, there has to be some weird combo going on there...or that unlikely as heck, bad batch of 960s.  I have CAT5e all over our house and maybe even CAT5 - whatever they were using in 1996 when it was built! 😄 And my 960 and wired SATs work like a champ.

Good luck.

That's correct. Anytime I connect to Ports 1 and 2, I do have a connection, but it's extremely slow. Speed test fails every time, always. Google.com takes about 1-2 minutes to load. Browsing websites with images is slow and images never load. They always show a broken image icon. When I mean slow I mean painfully slow. I wish I could tell you the speed, but the test fails every time.

Ports 3 and 4 have no issues. But this happened on the original RBR 960 and the replacement

Seems like if this is happening on two different 960s, something your connecting to ports 1 and 2 maybe causing problems? 

What is the brand and model of the device and if this is a PC, what is the brand and model of the ethernet adapter? 

And does this happen with only one device or happens with others? 

It's the MacBook Pro I mentioned earlier. It does this on all devices though. No matter what I plug into Ports 1 and 2 it's the same. Plugging in a Orbi satellite, a PS5, Apple TV, Windows PC, same issue occurs. Even plugging these devices into the satellite that's plugged into ports 1 or 2, same issue.

I've tried everything I can think of but no luck

Has NG support responded to your feedback with this problem being seen across two RBRs? 

So any updates or progress on this? 😉

Great to hear. Thank you for letting us know. 

Be sure to save off a back up configuration to file for safe keeping. Saves time if a reset is needed.
https://kb.netgear.com/000062080/How-do-I-back-up-the-configuration-settings-on-my-Orbi-WiFi-System
Enjoy. 📡