131 lines
4.6 KiB
Groff
131 lines
4.6 KiB
Groff
.\" Copyright (c) 1996-1999 Whistle Communications, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Subject to the following obligations and disclaimer of warranty, use and
|
|
.\" redistribution of this software, in source or object code forms, with or
|
|
.\" without modifications are expressly permitted by Whistle Communications;
|
|
.\" provided, however, that:
|
|
.\" 1. Any and all reproductions of the source or object code must include the
|
|
.\" copyright notice above and the following disclaimer of warranties; and
|
|
.\" 2. No rights are granted, in any manner or form, to use Whistle
|
|
.\" Communications, Inc. trademarks, including the mark "WHISTLE
|
|
.\" COMMUNICATIONS" on advertising, endorsements, or otherwise except as
|
|
.\" such appears in the above copyright notice or in the software.
|
|
.\"
|
|
.\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
|
|
.\" TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
|
|
.\" REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
|
|
.\" INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
|
|
.\" WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
|
|
.\" REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
|
|
.\" SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
|
|
.\" IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
|
|
.\" RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
|
|
.\" WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
.\" PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
.\" SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
|
|
.\" OF SUCH DAMAGE.
|
|
.\"
|
|
.\" Author: Archie Cobbs <archie@whistle.com>
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\" $Whistle: ng_lmi.8,v 1.4 1999/01/25 23:46:27 archie Exp $
|
|
.\"
|
|
.Dd January 19, 1999
|
|
.Dt NG_LMI 8
|
|
.Os FreeBSD 4.0
|
|
.Sh NAME
|
|
.Nm ng_lmi
|
|
.Nd Frame relay LMI protocol netgraph node type
|
|
.Sh SYNOPSIS
|
|
.Fd #include <netgraph/ng_lmi.h>
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm lmi
|
|
node type performs the frame relay LMI protocol. It supports
|
|
the ITU Annex A, ANSI Annex D, and Group-of-four LMI types.
|
|
It also supports auto-detection of the LMI type.
|
|
.Pp
|
|
To enable a specific LMI type, connect the corresponding hook (
|
|
.Dv annexA ,
|
|
.Dv annexD ,
|
|
or
|
|
.Dv group4 ")"
|
|
to DLCI 0 or 1023 of a
|
|
.Xr ng_frame_relay 8
|
|
node.
|
|
Typically, Annex A and Annex D live on DLCI 0 while Group-of-four
|
|
lives on DLCI 1023.
|
|
.Pp
|
|
To enable LMI type auto-detection, connect the
|
|
.Dv auto0
|
|
hook to DLCI 0 and the
|
|
.Dv auto1023
|
|
hook to DLCI 1023. The node will attempt to automatically determine
|
|
which LMI type is running at the switch, and go into that mode.
|
|
.Pp
|
|
Only one fixed LMI type, or auto-detection, can be active at any given time.
|
|
.Pp
|
|
The
|
|
.Dv NGM_LMI_GET_STATUS
|
|
control message can be used at any time to query the current status
|
|
of the LMI protocol and each DLCI channel. This node also supports the
|
|
.Dv NGM_TEXT_STATUS
|
|
control message.
|
|
.Sh HOOKS
|
|
This node type supports the following hooks:
|
|
.Pp
|
|
.Bl -tag -width foobarbaz
|
|
.It Dv annexA
|
|
ITU Annex A LMI hook.
|
|
.It Dv annexD
|
|
ANSI Annex D LMI hook.
|
|
.It Dv group4
|
|
Group-of-four LMI hook.
|
|
.It Dv auto0
|
|
Auto-detection hook for DLCI 0.
|
|
.It Dv auto1023
|
|
Auto-detection hook for DLCI 1023.
|
|
.El
|
|
.Sh CONTROL MESSAGES
|
|
This node type supports the generic control messages, plus the following:
|
|
.Bl -tag -width foo
|
|
.It Dv NGM_LMI_GET_STATUS
|
|
This command returns status information in a
|
|
.Dv "struct nglmistat" :
|
|
.Bd -literal -offset 4n
|
|
#define NGM_LMI_STAT_ARYSIZE (1024/8)
|
|
|
|
struct nglmistat {
|
|
u_char proto[12]; /* Active proto (same as hook name) */
|
|
u_char hook[12]; /* Active hook */
|
|
u_char fixed; /* If set to fixed LMI mode */
|
|
u_char autod; /* If currently auto-detecting */
|
|
u_char seen[NGM_LMI_STAT_ARYSIZE]; /* bitmap DLCIs seen */
|
|
u_char up[NGM_LMI_STAT_ARYSIZE]; /* bitmap DLCIs up */
|
|
};
|
|
.Ed
|
|
.It Dv NGM_TEXT_STATUS
|
|
This generic message returns is a human-readable version of the node status.
|
|
.El
|
|
.Sh SHUTDOWN
|
|
This node shuts down upon receipt of a
|
|
.Dv NGM_SHUTDOWN
|
|
control message, or when all hooks have been disconnected.
|
|
.Sh SEE ALSO
|
|
.Xr netgraph 4 ,
|
|
.Xr ng_frame_relay 8 ,
|
|
.Xr ngctl 8 .
|
|
.Rs
|
|
.%T "ANSI T1.617-1991 Annex D"
|
|
.Re
|
|
.Rs
|
|
.%T "ITU-T Q.933 Digital Subscriber Signaling System No. 1 - Signaling Specification for Frame Mode Basic Call Control, Annex A"
|
|
.Re
|
|
.Sh AUTHOR
|
|
Julian Elischer <julian@whistle.com>
|