IFCONFIG(8N)            COMMAND REFERENCE            IFCONFIG(8N)



NAME
     ifconfig - configure network interface parameters

SYNOPSIS
     /etc/ifconfig interface [ address ] [ parameters ]

DESCRIPTION
     Ifconfig is used to assign an address to a network interface
     and/or configure network interface parameters.  Ifconfig
     must be used at boot time to define the network address of
     each interface present on a machine; it may also be used at
     a later time to redefine an interface's address.  The
     interface parameter is a string of the form nameunit, e.g.
     en0, while the address is either a host name present in the
     host name data base, hosts(5n), or a DARPA Internet address
     expressed in the Internet standard ``dot notation''.

OPTIONS
     The following parameters may be set with ifconfig:

     up     Mark an interface up.

     down   Mark an interface down.  When an interface is marked
            down, the system will not attempt to transmit
            messages through that interface.

     trailers
            Enable the use of a trailer link level encapsulation
            when sending (default).  If a network interface
            supports trailers, the system will, when possible,
            encapsulate outgoing messages in a manner which
            minimizes the number of memory to memory copy
            operations performed by the receiver.

     -trailers
            Disable the use of a ``trailer'' link level
            encapsulation.

     arp    Enable the use of the Address Resolution Protocol in
            mapping between network level addresses and link
            level addresses (default).  This is currently
            implemented for mapping between DARPA Internet
            addreses and 10Mb/s Ethernet addresses.

     -arp   Disable the use of the Address Resolution Protocol.

     debug  Enable device driver specific debugging output.

     -debug Disable device driver specific debugging output.

     Ifconfig displays the current configuration for a network
     interface when no optional parameters are supplied.



Printed 5/12/88                                                 1

IFCONFIG(8N)            COMMAND REFERENCE            IFCONFIG(8N)



     Only the super-user may modify the configuration of a
     network interface.

DIAGNOSTICS
     Messages indicating the specified interface does not exit,
     the requested address is unknown, the user is not privileged
     and tried to alter an interface's configuration.

RETURN VALUE
     [0]            Ifconfig was successful.

     [1]            Ifconfig was unsuccessful.

     [USAGE]        Incorrect command line syntax. Execution
                    terminated.

     [P_ERR]        A system error occurred. Execution
                    terminated.  See intro(2) for more
                    information on system errors.

     [NP_WARN]      An error warranting a warning message
                    occurred. Execution continues.

SEE ALSO
     intro(4n), netstat(1n), and rc(8).






























Printed 5/12/88                                                 2

%%index%%
na:360,101;
sy:461,328;
de:789,897;
op:1686,2153;4271,84;
di:4355,307;
rv:4662,754;
se:5416,184;
%%index%%000000000130