SLIP(7)                                                      SLIP(7)


       NAME
             SLIP - Serial Line IP (SLIP) Protocol

       SYNOPSIS
             slip

       DESCRIPTION
             The Serial Line IP (SLIP) protocol is a very simple protocol
             which allows two machines to communicate via TCP/IP over a
             serial line.  This protocol simply defines the octets
             necessary for framing and escaping octets in an IP packet.

             At the sending end, all octets in the IP packet that should be
             preceded by an ``escape'' character, will be ``escaped''
             before sending this packet; this packet transmission will end
             with a FRAME_END octet.

             At the receiving end, the octets will be gathered and any
             ``escaped'' octets will be transposed (as necessary), until a
             FRAME_END is received for this packet; then the resulting
             packet will be passed up to IP.

          ioctls
             The following ioctl calls can be used to adjust the behavior
             of the SLIP module.

             S_COMPRESSON      Turn on TCP/IP header compression.

             S_COMPRESSOFF     Turn off TCP/IP header compression.

             S_COMPRESSAON     Turn on automatic detection of TCP/IP header
                               compression (start using compression when
                               peer system does).

             S_COMPRESSAOFF    Turn off automatic detection of TCP/IP
                               header compression.

             S_NOICMP          Don't allow ICMP packets out on the wire.

             S_ICMP            Allow ICMP packets out on the wire.

             S_MTU             Set the ``maximum transmission unit'' (MTU)
                               value for this interface.  This request
                               requires an integer as a parameter value to
                               indicate the new MTU size.



                           Copyright 1994 Novell, Inc.               Page 1

      SLIP(7)                                                      SLIP(7)


            Note that S_MTU is the only ioctl call which requires a
            parameter value.

      REFERENCES
            slattach(1M)
            RFC 1055, RFC 1144










































                          Copyright 1994 Novell, Inc.               Page 2