Command line IP Configuration: ifconfig



ifconfig interface [aftype] options | address ...
where:
  • interface: eth0, eth1, eth2 represent the computer ethernet interfaces
  • aftype: inet (TCP/IP, default), inet6 (IPv6), ax25 (AMPR Packet Radio), ddp (Appletalk Phase 2), ipx (Novell IPX) or netrom (AMPR Packet radio)
Options:
Option
Description
up
Activate the interface. Implied if IP addresses are specified.
down
Shut down interface
arp
Enable ARP protocol on this interface. Allow ARP to detect the addresses of computer hosts attached to the network.
-arp
Disable ARP protocol on this interface
promisc
Enable promiscuous mode. Receive all packets on the network not just those destined for this interface.
-promisc
Disable promiscuous mode.
mtu ##
Specify the Maximum Transfer Unit (MTU) of the interface. The MTU is the maximum number of octets the interface is able to handle in a single transaction. Defaults: Ethernet: 1500 SLIP: 296
broadcast XXX.XXX.XXX.XXX
Set the network broadcast address for this interface.
netmask XXX.XXX.XXX.XXX
Set the IP network mask for this interface.