VLANs are isolated broadcast domains that run over a single physical network. They allow you to segment a local network and also to "stretch" a LAN over multiple physical locations. Most enterprises implement this on their network switching environment, but in some cases, the tagged VLANs reach your server.
In order to configure a VLAN, we need an established network connection on the local network interface.
For the sake of ease, our physical network interface is called
eth0. The VLAN's ID is 1, and the IPv4 address is
10.0.0.2, with a subnet mask of
255.0.0.0 and a default gateway of
nmcli, we need to first create the connection and then activate ...