Port 1 becomes the CC-Link IE TSN, and port 2 can be switched between Ethernet and CC-Link IE TSN.
To use port 2 as an Ethernet port, set the Built-in Network Type to "Ethernet + CC-Link IE TSN" when creating a new project in GX Works3.

To use port 2 as the CC-Link IE TSN port, set the Built-in Network Type to "CC-Link IE TSN" when creating a new project in GX Works3.

To switch Port 2 while creating a project, select [Project] ⇒ [Change Module Type/Operation Mode] in GX Works3 and select [Built-in Network Type].