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GIFCONFIG(8)		  BSD System Manager's Manual		  GIFCONFIG(8)

NAME
     gifconfig - configure generic IP tunnel

SYNOPSIS
     gifconfig interface [af] [physsrc physdest]
     gifconfig interface delete
     gifconfig -a

DESCRIPTION
     gifconfig configures the physical address for the generic IP tunnel inte-
     face, such as "gif0".  Argument physsrc and physdest are interpreted as
     the outer source/destination address for encapsulating IPv4/v6 header.
     Argument af specifies the address family for physsrc and physdest. af can
     be inet or inet6, and will be treated as inet if ommitted.

     If a special argument delete is specified, gifconfig just deletes the ex-
     isting source and destination addresses on interface. If no outer ad-
     dresses are specified, this usage has no effect.

     gifconfig takes the following optional argument:

     -a	     Display information associated with all gif(4) interfaces.

     Please note that it is very easy to create infinite routing loop, when
     you configure tunnel over same address family (e.g. IPv4-over-IPv4).

EXAMPLES
     If you would like to configure IPv6 over IPv4 (aka IPv6 in IPv4) tunnel
     between 10.1.1.1 and 10.2.3.4, you should perform the following command:

     # gifconfig gif0 inet 10.1.1.1 10.2.3.4

     This is also possible to use IPv6 as outer proto, by replacing inet to
     inet6, and IPv4 addresses to some appropriate IPv6 addresses in above ex-
     ample.

RETURN VALUES
     The command exits with exit status of 1 on errors, 0 on success.

SEE ALSO
     gif(4),  ifconfig(8)

HISTORY
     The gifconfig command first appeared in WIDE Hydrangea IPv6 protocol
     stack kit.

 KAME				 May 17, 1998				     1

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