The router provides an Ethernet management port named GigabitEthernet0.
The Ethernet management port allows you to perform management tasks on the router. It is an interface that should not, and often cannot, forward network traffic, but can be used to access the router via Telnet and Secure Shell (SSH) to perform management tasks on the router. The interface is most useful before a router has begun routing, or in troubleshooting scenarios when other forwarding interfaces are inactive.
If it could be configured as a "normal" port (which is a big if), you're may also find it offers very little capacity and any substantial traffic on the port might overload the router.
