1.\" Copyright (c) 1996-1999 Whistle Communications, Inc. 2.\" All rights reserved. 3.\" 4.\" Subject to the following obligations and disclaimer of warranty, use and 5.\" redistribution of this software, in source or object code forms, with or 6.\" without modifications are expressly permitted by Whistle Communications; 7.\" provided, however, that: 8.\" 1. Any and all reproductions of the source or object code must include the 9.\" copyright notice above and the following disclaimer of warranties; and 10.\" 2. No rights are granted, in any manner or form, to use Whistle 11.\" Communications, Inc. trademarks, including the mark "WHISTLE 12.\" COMMUNICATIONS" on advertising, endorsements, or otherwise except as 13.\" such appears in the above copyright notice or in the software. 14.\" 15.\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 16.\" TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 17.\" REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 18.\" INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 19.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 20.\" WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 21.\" REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 22.\" SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 23.\" IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 24.\" RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 25.\" WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 26.\" PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 27.\" SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 31.\" OF SUCH DAMAGE. 32.\" 33.\" Author: Archie Cobbs <archie@FreeBSD.org> 34.\" 35.\" $FreeBSD: src/share/man/man4/ng_frame_relay.4,v 1.11.2.1 2001/12/21 09:00:51 ru Exp $ 36.\" $Whistle: ng_frame_relay.8,v 1.4 1999/01/25 23:46:26 archie Exp $ 37.\" 38.Dd January 19, 1999 39.Dt NG_FRAME_RELAY 4 40.Os 41.Sh NAME 42.Nm ng_frame_relay 43.Nd frame relay netgraph node type 44.Sh SYNOPSIS 45.In netgraph/frame_relay/ng_frame_relay.h 46.Sh DESCRIPTION 47The 48.Nm frame_relay 49node type performs encapsulation, de-encapsulation, and multiplexing 50of packets using the frame relay protocol. It supports up to 1024 DLCI's. 51The LMI protocol is handled by a separate node type (see 52.Xr ng_lmi 4 ) . 53.Pp 54The 55.Dv downstream 56hook should be connected to the synchronous line, i.e., the switch. 57Then hooks 58.Dv dlci0 , 59.Dv dlci1 , 60through 61.Dv dlci1023 62are available to connect to each of the DLCI channels. 63.Sh HOOKS 64This node type supports the following hooks: 65.Bl -tag -width foobar 66.It Dv downstream 67The connection to the synchronous line. 68.It Dv dlciX 69Here X is a decimal number from 0 to 1023. This hook corresponds 70to the DLCI X frame relay virtual channel. 71.El 72.Sh CONTROL MESSAGES 73This node type supports only the generic control messages. 74.Sh SHUTDOWN 75This node shuts down upon receipt of a 76.Dv NGM_SHUTDOWN 77control message, or when all hooks have been disconnected. 78.Sh SEE ALSO 79.Xr netgraph 4 , 80.Xr ng_lmi 4 , 81.Xr ngctl 8 82.Sh HISTORY 83The 84.Nm 85node type was implemented in 86.Fx 4.0 . 87.Sh AUTHORS 88.An Julian Elischer Aq Mt julian@FreeBSD.org 89.Sh BUGS 90Technically, frames on DLCI X should not be transmitted to the switch 91until the LMI protocol entity on both ends has configured DLCI X as active. 92The 93.Nm 94node type ignores this restriction, and will always pass data received 95on a DLCI hook to 96.Dv downstream . 97Instead, it should query the LMI node first. 98