Connecting 2 ethernet PC's and one eero wifi hub to Netgear CM1200

> Are there any issues with connecting 2 PCs to Ethernet ports and a
> EERO wifi base unit to a third Ethernet port with the CM1200 Cable
> Modem?

   "Ethernet ports" _where_?  On the CM1200?  One potential problem
("issue"?) might be that it probably wouldn't work.

      https://community.netgear.com/t5/x/x/m-p/1770096

   Note: "a EERO wifi base unit" is not a very detailed description of
anything.  "base unit" tells me approximately nothing. Has it a model
number?