Mac OS X in a Nutshell

Name

ipconfig

Synopsis

ipconfig getifaddr interface
ipconfig getoption { interface | “” } { option_name | option_ code }
ipconfig getpacket interface
ipconfig ifcount
ipconfig set interface { BOOTP | DHCP }
ipconfig set interface { INFORM | MANUAL } IP_addr 
                     netmask
ipconfig waitall

Interacts with the IP Configuration Agent of configd to manage network configuration changes.

Options

getifaddr

Prints the specified network interface’s IP address to standard output.

getoption

Prints the value of the specified DHCP option to standard output. If interface is specified, the option is interface-specific. If empty quotes are used instead, the option is global. Option names and numeric codes are DHCP-standard (such as host_name, domain_name, netinfo_server_ address, etc.).

getpacket

Prints DHCP-transaction packets to standard output.

ifcount

Prints the number of network interfaces to standard output.

set

Sets the method by which the specified network interface is assigned an IP address. Using BOOTP or DHCP causes the system to attempt to contact a server of the appropriate type to obtain IP configuration information. Using INFORM sets the IP address locally, but initiates a DHCP request to obtain additional IP configuration information (DNS servers, default gateway, etc.). Using MANUAL indicates that all IP configuration information is set locally.

waitall

Sets the configurations of all network interfaces according to the specifications in /etc/iftab.