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NG_FRAME_RELAY(4)      FreeBSD Kernel Interfaces Manual	     NG_FRAME_RELAY(4)

NAME
     ng_frame_relay -- frame relay netgraph node type

SYNOPSIS
     #include <netgraph/ng_frame_relay.h>

DESCRIPTION
     The frame_relay node type performs	encapsulation, de-encapsulation, and
     multiplexing of packets using the frame relay protocol.  It supports up
     to	1024 DLCI's.  The LMI protocol is handled by a separate	node type (see
     ng_lmi(4)).

     The downstream hook should	be connected to	the synchronous	line, i.e.,
     the switch.  Then hooks dlci0, dlci1, through dlci1023 are	available to
     connect to	each of	the DLCI channels.

HOOKS
     This node type supports the following hooks:

     downstream
	     The connection to the synchronous line.

     dlciX   Here X is a decimal number	from 0 to 1023.	 This hook corresponds
	     to	the DLCI X frame relay virtual channel.

CONTROL	MESSAGES
     This node type supports only the generic control messages.

SHUTDOWN
     This node shuts down upon receipt of a NGM_SHUTDOWN control message, or
     when all hooks have been disconnected.

BUGS
     Technically, frames on DLCI X should not be transmitted to	the switch
     until the LMI protocol entity on both ends	has configured DLCI X as
     active.  The ng_frame_relay node type ignores this	restriction, and will
     always pass data received on a DLCI hook to downstream.  Instead, it
     should query the LMI node first.

SEE ALSO
     netgraph(4), ng_lmi(4), ngctl(8)

HISTORY
     The ng_frame_relay	node type was implemented in FreeBSD 4.0.

AUTHORS
     Julian Elischer <julian@FreeBSD.org>

FreeBSD	10.1		       January 19, 1999			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | HOOKS | CONTROL MESSAGES | SHUTDOWN | BUGS | SEE ALSO | HISTORY | AUTHORS

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