Linux IP

Devices

Show and change device settings

ip link set dev eth2 up|down
ip link set dev eth0 up|down arp on|off name NAME mtu 9000

Show current settings for interface

ip link show dev NAME

Show only UP interfaces ip link show up

Vlan

Add a vlan interface

ip link add link eth1 name eth1.101 type vlan id 101

Routing

ip route show
ip route add 192.168.1.0/24 dev eth0
ip route add default via 192.168.1.254