ip (command)

ip command show / manipulate routing, network devices, interfaces and tunnels.

• Man page: https://man7.org/linux/man-pages/man8/ip.8.html
• ip link https://man7.org/linux/man-pages/man8/ip-link.8.html

Linux

• ip route show. See also: netstat -rnv
• ip route add
• ip route del default

• ip address show

• ip link show or ip link ls
• ip link set eth0 up
• ip link set dev eth0 mtu 9000 (Jumbo frames)
• ip link add

Policy based routing / Source routing policy:

ip route add from <source>/<mask> table <name> 
ip route add 1.2.3.4/24 via <router> dev eth4 table <name>

• ip link add wg0 type wireguard

• ip rule add

Set an IP address:

• ip addr add 192.168.0.xx/24 dev eth0

Default gateway:

• ip route add default via 192.0.2.2 dev eth0

• ip route add default via 192.0.2.2 dev eth55

Cannot find device "eth55"

• ip -s neighbor list

MACHINE_IP=$(/sbin/ip -o -4 addr list eth0 | awk '{print $4}' | cut -d/ -f1)

Cisco IOS

• debug ip domain
• ip (Cisco IOS)
• ip route
  • ip route show table all
• ip default-gateway

Related terms

• geoiplookup
• netplan
• route
• IP (address)

See also

• ip (command), ip link, ip link show, ip link add, ip route, ip link set, ip address show, public ip
• ip [link, route], ifconfig netstat ss lsof ping ethtool mii-tool arping nmcli(RHEL) route networkctl, netplan, tc
• TCP/IP, Transport protocol, UDP, SCTP, QUIC, subnet mask, Routing protocols: BGP, routing table, Policy based routing, multicast, TCP Fast Open, RDP, TTL, RTT, MPTCP, Large send offload (LSO): (TSO, GRO, GSO, TCP checksum), ethtool, SCTP, 5-Tuple, Check TCP connectivity, TCP window size, /proc/sys/net/ipv4/tcp_rmem, ack, List of TCP ports, localhost, broadcast address