WAN Link Aggregation - CM2000 -> Netgear Managed Switch -> 750 Series Orbi Router

Alas, this appears to be a "non-starter".  The GS308T has (8) 1000Mbs/Full Ethernet ports.  Connecting one of them to the 2.5G port on the CM2000 results in one gigabit link from modem to switch.  No matter how many ports are connected to the RBR750 router, there is only one gigabit coming from the modem.

If you could find a switch with 2.5G Ethernet ports that supports Link Aggregation, then maybe this would work.

We advise people all the time, "Do not put a switch between the Orbi router and the modem."  There is actually nothing fatal about doing this (I have*) unless some other devices are connected to that switch (besides the modem and router).  When that happens, the modem gets really confused about "what am I connected to?"

* My goal was to use Wireshark to snoop on the link between modem and router. Plugged modem into port 1. Router into port 2. And then "Mirrored" port 1 to another port where I connected an Ethernet cable to a PC and ran Wireshark on that link.  Why do something like this?  Because the Orbi Debug option Enable LAN/WAN packet capture fills up the buffer so quickly that I could not capture all the traffic I wanted.  Using Wireshark on a PC meant I could capture until the 1TB disk drive filled up.