How to get link aggregation working

I have Mediacom cable internet. I talked with them and link aggregation and the 4 ports on the back of my Netgear cm1200 modem should all work.

I enabled link aggregation on the modem and Tplink ax6000 Archer router and connected cables to the ports in the instructions (1 & 2 on the modem and 2 & 3 on the router). After which, the router says the wan port isn't connected and there is no internet access. The router instructions do not say the wan port needs connected.

I tried plugging my smart TV into the modem: no connection. Same story with my Tivo and the base for my power line wifi extender. My laptop, however, initially didn't work when I tried, but after a while and maybe a modem reboot, it said it was connected to the internet, and said the network name was the same as the wifi related to the power line extender. That is weird for two reasons: the laptop wifi was off and the powerline base was plugged into the router. I unplugged the powerline base altogether and the laptop still had a successful internet connection under that same network name.

When the laptop is connected to the modem, the modem has a green light for that port. When the tv or powerline base is connected, they have orange lights on the modem ports. When the tivo is connected, it gets green, but still no internet connection.

Both modem and router appear to have their latest firmware.

What am I doing wrong?

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I'm reading a few tutorials.

So I'm looking at TP-Link and
"Link Aggregation – Doubles the connection speeds to an
external storage devices for faster streaming and data

That explains it. This feature is not for your Internet feed but for a NAS or external storage device.
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Not sure

I'm seeing conflicting info on if it increases internet bandwidth. But in either case, it should still work, according to the instructions I read. And, it still leaves the mystery of why the other ports on the modem only seem to work for my laptop and not my tv or powerline extender base.

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Then you will call the makers.

I'm using the maker documentation and see no indication it's for use outside the NAS.

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Other part of question

Any thoughts on internet connection via modem ports only working for my laptop?

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I was addressing the link aggregation and its use. As long as it's misconfigured, problems are expected. Since you doubt the documentation I referenced then I must step aside and let you deal with the makers.

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I do appreciate your help.

I had changed it back to disable link aggregation before posting, so it shouldn't be misconfigured anymore, and the router works fine. I guess I was confused before that the modem seems like it should do aggregation to the modem, but this modem will only do it for other devices, not the modem.

Reading through stuff again, it sounds like modem port 2 ONLY works for link aggregation. I had the laptop in port 3 or 4 when it was working. I'm not sure what port I had the extender base or the tv on when I tried them, so I need to try those again and pay attention to the port number.

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Let me note something.

Even for everyday 4K streaming from a NAS, we should be fine with 25 megabits. Reference:

So most ports are 100 megabit the extra speed will help a little when copying files around but not as much as you think. Write speeds to most drives are under 1,000 megabits so a single gigabit port is fine without try aggregation or aggravation.

All that aside, I learned all this by trying it out and encourage everyone that can, learn by doing and testing.

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Another trial

I connected the tv to port 4 and got nothing. Well, a connection check through the tv said it failed, but then gave me the ip etc. But no primary dns. I connected the laptop to port 2 and it still worked fine.

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