Configuring a Gigabit Ethernet port needs an interface context, IP settings on Layer 3 ports, matching speed and duplex, and an enabled state.
For the full breakdown, see our best 1G Ethernet Interface guide.
The configuration that brings a Gigabit Ethernet port to life is only four commands long, yet mismatched speed and duplex settings still drop countless links to 100 Mb/s. The exact steps for how to configure Gigabit Ethernet interface ports differ by vendor, but every platform follows the same core: enter the interface, assign an IP when the port routes, match speed and duplex on both ends, then enable the port. Skip any of those and the link stays down or runs at a fraction of its rating.
The Core Steps In Any Gigabit Ethernet Configuration
A usable Gigabit Ethernet configuration is four settings deep: interface