slip(ADMP)                      19 June 1992                      slip(ADMP)


 Name

    slip - Serial Line IP (SLIP) Protocol

 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 send-
    ing this packet; this packet transmission will end with a FRAMEEND
    octet.  At the receiving end, the octets will be gathered and any
    ``escaped'' octets will be transposed (as necessary), until a FRAMEEND
    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.

    _________________________________________________________________________
       NOTE  The SMTU ioctl is the only ioctl call which needs a parame-
       ter value, an integer.
    _________________________________________________________________________


    SCOMPRESSON        Turn on TCP/IP header compression.

    SCOMPRESSOFF       Turn off TCP/IP header compression.

    SCOMPRESSAON       Turn on automatic detection of TCP/IP header compres-
                        sion (start using compression when peer system does).

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

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

    SICMP              Allow ICMP packets out on the wire.

    SMTU               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.

 See also

    slattach(ADMN),
    RFC 1055, RFC 1144