Link aggregation

Hi I've been trying to get link aggregation setup between my archer ax10000 and my Motorola mb8600 modem, I can get the blue bonded port light to show but no matter what I do I can't get my router online. I've even tried using moca for an Ethernet connection for the wan port since it's a wan/Lan  and it worked for a few hours then everything went off line. Can anyone tell me what I'm doing wrong or what I might need I have three switches 2 have link aggregation but I wanted to get this connection done without a switch. If someone can tell me if it is absolutely necessary to have a switch to be able to have an active connection or anything if I'm connecting the cables wrong I've tried using wan/lan and the 1st aggregated port but nothing I've tried both link aggregated ports to modems link aggregated ports and used the 3 port on the modem for the lan\wan Any insight would be greatly appreciated!!! Thanks in advance!

Solved the issue all i needed to do was disconnect everything from my network other than the modem and router connect the link aggregated ports of the router to the first two ports on the modem and use the 3rd port on the modem for the wan/lan connection have some patients and boom everything went online then i gave my modem and router a little time to settle in and then i connected my moca and access point and now everything has been working perfectly. Other than xfinity putting a block on my upstream channels so i could only get one upstream channel to lock and my downtream and upstream frequency was unbelievably high. I was out of a network for 6 days and i work from home and xfinity had done everything other than help me or tell me why i couldnt get my modem to lock down its channels suddenly. cause they had put a block on my network. SO anyone that has xfinity and does try to do this , dont be surprised if your network suddenly not working cause xfinity doesnt like it when you get link aggregation congifured they especially dont like anyone using moca cause they use moca to produce our internet. Its been a nightmare when all i wanted to do was accomplish something i had been trying to do for over a year and i finally do and xfinity literally destroyed my network. im now trying to fix everything they have done.