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ip

ip

This document summarizes the usage of ip for controlling and querying networks in Linux.

1. ip

1.1. Address (L2, L3)

  • ip addr : Display address information for all interfaces
  • ip addr show [Interface] : Display address information for the interface named [Interface]
  • ip addr add [IP/CIDR] dev [Interface] : Add IP/CIDR configuration to the interface named [Interface]
  • ip addr del [IP/CIDR] dev [Interface] : Delete IP/CIDR configuration from the interface named [Interface]

1.2. Link (L2)

  • ip link : Display link information for all interfaces
  • ip link show (dev) [Interface] : Display link information for the interface named [Interface]
  • ip link set (dev) [Interface] up : Change the interface named [Interface] to online state
  • ip link set (dev) [Interface] down : Change the interface named [Interface] to offline state

1.3. Route

  • ip route : Display routing table information
  • ip route add default via [IP] dev [Interface] : Set local default gateway IP address to [IP] and use interface [Interface]

1.4. Neighbour (ARP)

  • ip neigh : Display interface information of external hosts on the same network as this host
  • ip neigh show dev [Interface] : Display interface information of external hosts on the network connected through [Interface]

2. References

iostatjournalctl