FR(4) BSD Programmer's Manual FR(4)NAMEfr - Frame Relay serial line encapsulation
SYNOPSIS
#include <sys/types.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/if_fr.h>
options FR
DESCRIPTION
The FR serial line encapsulation provides a method for transmitting data-
grams over synchronous serial point-to-point links. The current FR im-
plementation includes support for ANSI, FRIF, and CCITT Link Management
Protocols for both DTE and DCE interfaces. DCE support is mainly for
testing and not fully functional.
The kernel configuration option FR should be defined to include the rele-
vant code in the kernel.
The FR encapsulation options are configurable by the frconfig(8) utility.
The following interface ioctl(2) requests are specific to Frame Relay:
FR_SCONFIG struct fr_req *req
Set the configuration for the link. See frconfig(8) for a com-
plete description of the various parameters. See <net/if_fr.h>
for a description of the fr_req structure.
FR_GCONFIG struct fr_req *req
Get the configuration for the link.
FR_SROUTE struct fr_rtreq *rtreq
Add a static route between an IPv4 address (and mask) and a DLCI.
Normally this is done automatically by using inverse arp, howev-
er, if the other side does not support inverse arp this command
may be used to force a route. See <net/if_fr.h> for a descrip-
tion of the fr_rtreq structure.
FR_CROUTE struct fr_rtreq *rtreq
Clear a static route between an IPv4 address (and mask) and a DL-
CI.
FR_GROUTE struct fr_mapreq *mapreq
Get a list of static routes between IPv4 addresses (and masks)
and DLCIs. See <net/if_fr.h> for a description of the fr_mapreq
structure.
FR_GMAP struct fr_mapreq *mapreq
Get a list of dynamic routes between IPv4 addresses (and masks)
and DLCIs. These routes are created by automatic inverse arp
queries for each discovered DLCI.
Since synchronous interfaces support more than one link-level protocol,
FR should be selected before any data will be transmitted through the in-
terface. To select FR on synchronous interfaces, the linktype fr parame-
ter to ifconfig(8) should be used.
SEE ALSOioctl(2), socket(2), intro(4), p2p(4), frconfig(8), ifconfig(8),
BUGS
Currently only IP version 4 transport level is supported.
BSDI BSD/OS July 13, 1998 2
