Ip (command)

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Linux

• ip route show. See also: netstat -rnv
• ip route add
• ip route del default
• ip link show
• ip link set dev eth0 mtu 9000 (Jumbo frames)

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 link set eth0 up

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"

Cisco IOS

• debug ip domain
• ip (Cisco IOS)
• ip default-gateway

Related commands

• geoiplookup
• netplan
• route

See also

• 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