greconfig(8) - NetBSD Manual Pages

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GRECONFIG(8)            NetBSD System Manager's Manual            GRECONFIG(8)


NAME

     greconfig - set characteristics of the gre(4) pseudo device


SYNOPSIS

     greconfig -i unit [-v]
     greconfig -i unit [-d dst] [-s src] [-p proto] [-v]


DESCRIPTION

     greconfig is used to manipulate or display the characteristics of the
     gre(4) tunnel device. The first form shown above displays the current pa-
     rameters, while the second one sets parameters to new values.

     The options have the following meanings:

     -i unit
           Denotes the interface that is to be set/displayed. Unit is in the
           form ``greN'' where N is an integer from zero to the maximum num-
           bers of units. This option is always required.

     -d dst
           Sets the IP address of the remote tunnel end. This may be the same
           as the tunnel destination set with ifconfig(8) when IP packets are
           to be encapsulated.

     -s src
           Sets the IP address of the local tunnel end. This may be the same
           as the tunnel gateway set with ifconfig(8) when IP packets are to
           be encapsulated.

     -p proto
           Sets the way how packets are encapsulated. Currently supported val-
           ues are:

           47 GRE encapsulation as described in RFC 1701,1702

           55 MOBILE encapsulation as described in RFC 2004

     -v    Give a little more verbose output when running greconfig.

     Note that the values for src, dst, proto must be coordinated with the re-
     mote end of the tunnel.

     For tunnels that run IP as encapsulated protocol, the tunnel endpoints
     can be set with the normal ifconfig(8).  In this case, the encapsulation
     protocol can be chosen by giving ``-link0'' for GRE encapsulation as ar-
     gument to ifconfig(8).


SEE ALSO

     gre(4), netintro(4), protocols(5), ifconfig(8)

     A description of GRE encapsulation can be found in RFC 1701, RFC 1702.

     A description of MOBILE encapsulation can be found in RFC 2004.


AUTHORS

     Heiko W.Rupp <hwr@pilhuhn.de>

NetBSD 1.6.2                    August 14, 1998                              1