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



Printed 10/17/86                                                1

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



         Disable device driver specific debugging output.

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

     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), rc(8).

























Printed 10/17/86                                                2

%%index%%
na:72,85;
sy:157,244;
de:401,789;
op:1190,1593;2927,312;
di:3239,263;
rv:3502,624;
se:4126,147;
%%index%%000000000129