ifconfig.1m (2012 03)

ifconﬁg(1M) ifconﬁg(1M)

EXAMPLES

To conﬁgure the primary interface lan0 with a subnet mask and set to the default broadcast address

#ifconfig lan0 192.168.1.1 netmask 255.255.255.128 up

To change the default broadcast address

#ifconfig lan0 255.255.255.0 broadcast

To check conﬁguration values for network interface lan0

#ifconfig lan0

To conﬁgure secondary interface lan0:1. By default this turns the interface "up"

#ifconfig lan0:1 192.168.1.3 netmask 255.255.255.0 up

#ifconfig lan0:1 192.168.1.3 netmask 255.255.255.0

To bring down secondary interface lan0:1

#ifconfig lan0:1 down

#ifconfig lan0:1 inet down

To disable and enable the interface

#ifconfig lan0 down

#ifconfig lan0 up

To remove secondary interface lan0:1

#ifconfig lan0:1 0

To remove primary interface lan0. Note: All secondaries should have been brought down ﬁrst for interface

lan0 to be unplumbed.

#ifconfig lan0 unplumb

To assign another IP address to loopback interface lo0. Note: Primary loopback interface (lo0:0) cannot be

changed.

#ifconfig lo0:1 127.0.0.2

To change the routing metric of interface lan0 to 3. This makes the routing protocol prefer routes with

values of 0, 1 or 2.

#ifconfig lan0 192.168.1.1 netmask 255.255.255.0 metric 3

#ifconfig lan0 metric 3

DIAGNOSTICS

Messages indicate if the speciﬁed interface does not exist, the requested address is unknown, or the user

is not privileged and tried to alter an interface’s conﬁguration.

WARNINGS

The

lanadmin, lanscan, and linkloop commands are deprecated. These commands will be

removed in a future HP-UX release. HP recommends the use of replacement command nwmgr(1M) to

perform all network interface-related tasks.

AUTHOR

ifconfig was developed by HP and the University of California, Berkeley.