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SL(4)                    BSD Kernel Interfaces Manual                    SL(4)

NAME
     sl -- slip network interface

SYNOPSIS
     device sl [count]

DESCRIPTION
     The sl interface allows serial lines to be used as network interfaces
     using the slip protocol.  The sl interface can use Van Jacobson TCP
     header compression and ICMP filtering.  This is arranged by using the
     various link-level flags to the ifconfig(8) command:

     link0   Enable VJ header compression.
     link1   Suppress ICMP traffic.
     link2   Enable VJ header compression autodetection.  This will turn on
             the link0 flag as soon as the first VJ-compressed packet has been
             seen by the driver.

DIAGNOSTICS
     sl%d: af%d not supported.  The interface was handed a message with
     addresses formatted in an unsuitable address family; the packet was
     dropped.

SEE ALSO
     inet(4), intro(4), slattach(8), sliplogin(8), slstat(8)

BSD                             August 10, 1996                            BSD