# Add a VLAN(101)
ip link add link eth0 name eth0.101 type vlan id 101
# or
vconfig add eth0 101

# Bring up the new VLAN(101) interface
ip link set up dev eth0.101
# Add the address to the VLAN(101)
ip addr add dev eth0.101 10.0.0.12/30

# Short commands
ip l a      link eth0 name eth0.101 type vlan id 101
ip l s      up dev eth0.101
ip a a      dev eth0.101 10.0.57.3/24