o  To query the status of an interface we0, enter:

       $ ifconfig we0

    o  To configure the local loopback interface, enter:

       $ ifconfig lo0 inet  127.0.0.1 up

       Only a privileged user can modify the configuration of a
       network interface.

    o  To configure a ie0 interface, enter:

       $ ifconfig ie0 212.232.32.1/22

       The broadcast address is 212.232.35.255 as the 22-bit mask
       specifies four Class C networks.

    o  To configure an address that is not protected by failSAFE IP,
       enter:

       $ ifconfig -fs ie0 210.208.19.3/16

    o  To configure an alias address with a home interface, so that
       failSAFE IP will attempt to return the address to its home
       after the home recovers from a failure, enter:

       $ ifconfig we0 home alias 156.47.92.8/24

    o  To configure IPv6 on a ie0 interface, enter:

       $ ifconfig ie0 ipv6 up

    o  To configure an IPv6 link-local alias address on interface
       ie0, enter:

       $ ifconfig ie0 inet6 alias fe80::202:a5ff:fe60:abcd

    o  To add alias 132.50.40.35 with a netmask of 255.255.255.0 in
       CIDR format to interface we0, enter:

       $ ifconfig we0 alias 132.50.40.35/24

    o  To add network addresses 40 through 50, inclusive, to subnets
       18.240.32, 18.240.33, 18.240.34, 18.240.35, and 18.240.36
       with a netmask of 255.255.255.0 in CIDR format to the we0
       interface, enter:

       $ ifconfig we0 aliaslist 132.240.32-36.40-50/24

    o  To add network addresses 40 through 50, inclusive, to
       subnets 18.240.32, 18.240.64, and 18.240.96 with a netmask
       of 255.255.255.0 in CIDR format to the we0 interface, enter:

       $ ifconfig we0 aliaslist 132.240.32,64,96.40-50/24

       To stop Ethernet interface we0, delete all addresses
       associated with the interface, and close all TCP connections,
       enter:

       $ ifconfig we0 down delete abort
       145.92.16.1: aborting 7 tcp connection(s)

    o  To delete the alias address 145.92.16.2 on interface we0 and
       close all TCP connections, enter:

       $ ifconfig we0 -alias 145.92.16.2 abort
       145.92.16.2: aborting 2 tcp connection(s)

    o  To create an IPv6 address for prefix AB:CD:CE:AB, enter:

       $ ifconfig we0 inet6 ip6prefix AB:CD:CE:AB::/64

    o  To force an interface into a failed state, enter:

       $ ifconfig ie0 fail

       Note that this causes all routes that use IE0 to be deleted.

    o  To force an interface to recover from a failed state, enter:

       $ ifconfig ie0 -fail

       Note that only interface routes are recovered. Other static
       routes must be restored manually.

    o  To display the names of the interfaces on the system only,
       enter:

       $ ifconfig -l
       IE0 IE1 IE2 IE3 LO0 TN0 TN1 WE0

    o  To display the hardware and IP address of interface we0,
       enter:

       $ ifconfig -v we0
       we0: options=c63<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST,SIMPLEX>
       HWaddr 8:0:2b:9e:14:a2
       inet 192.140.34.16 netmask ffffff00 broadcast 192.140.34.255 ipmtu 1500