CISCO_HDLC(4) BSD Programmer's Manual CISCO_HDLC(4)NAME
cisco_hdlc - Cisco HDLC serial line encapsulation
SYNOPSIS
#include <sys/types.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/pppioctl.h>
options CISCO_HDLCDESCRIPTION
The CISCO_HDLC serial line encapsulation provides a method for transmit-
ting datagrams over synchronous serial point-to-point links. The current
Cisco HDLC implementation includes support for the Cisco Serial Line Ad-
dress Resolution Protocol (SLARP).
The kernel configuration option CISCO_HDLC should be defined to include
the relevant code in the kernel.
Cisco HDLC encapsulation and SLARP have no configurable options.
Since synchronous interfaces support more than one link-level protocol,
Cisco HDLC should be selected before any data will be transmitted through
the interface. To select Cisco HDLC on synchronous interfaces, the
linktype chdlc parameter to ifconfig(8) should be used.
SEE ALSOioctl(2), socket(2), intro(4), p2p(4), ifconfig(8),
BUGS
Currently only IP transport level is supported; future releases may be
extended to include OSI and Xerox NS.
BSDI BSD/OS March 1, 1993 1