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33 .\" Author: Archie Cobbs <archie@FreeBSD.org>
36 .\" $Whistle: ng_lmi.8,v 1.4 1999/01/25 23:46:27 archie Exp $
43 .Nd frame relay LMI protocol netgraph node type
50 node type performs the frame relay LMI protocol.
52 the ITU Annex A, ANSI Annex D, and Group-of-four LMI types.
53 It also supports auto-detection of the LMI type.
55 To enable a specific LMI type, connect the corresponding hook
60 to DLCI 0 or 1023 of a
63 Typically, Annex A and Annex D live on DLCI 0 while Group-of-four
66 To enable LMI type auto-detection, connect the
68 hook to DLCI 0 and the
71 The node will attempt to automatically determine
72 which LMI type is running at the switch, and go into that mode.
74 Only one fixed LMI type, or auto-detection, can be active at any given time.
77 .Dv NGM_LMI_GET_STATUS
78 control message can be used at any time to query the current status
79 of the LMI protocol and each DLCI channel.
80 This node also supports the
84 This node type supports the following hooks:
86 .Bl -tag -width foobarbaz
90 ANSI Annex D LMI hook.
92 Group-of-four LMI hook.
94 Auto-detection hook for DLCI 0.
96 Auto-detection hook for DLCI 1023.
99 This node type supports the generic control messages, plus the following:
101 .It Dv NGM_LMI_GET_STATUS
102 This command returns status information in a
103 .Dv "struct nglmistat" :
104 .Bd -literal -offset 4n
105 #define NGM_LMI_STAT_ARYSIZE (1024/8)
108 u_char proto[12]; /* Active proto (same as hook name) */
109 u_char hook[12]; /* Active hook */
110 u_char fixed; /* If set to fixed LMI mode */
111 u_char autod; /* If currently auto-detecting */
112 u_char seen[NGM_LMI_STAT_ARYSIZE]; /* bitmap DLCIs seen */
113 u_char up[NGM_LMI_STAT_ARYSIZE]; /* bitmap DLCIs up */
116 .It Dv NGM_TEXT_STATUS
117 This generic message returns is a human-readable version of the node status.
120 This node shuts down upon receipt of a
122 control message, or when all hooks have been disconnected.
125 .Xr ng_frame_relay 4 ,
128 .%T "ANSI T1.617-1991 Annex D"
131 .%T "ITU-T Q.933 Digital Subscriber Signaling System No. 1 - Signaling Specification for Frame Mode Basic Call Control, Annex A"
136 node type was implemented in
139 .An Julian Elischer Aq julian@FreeBSD.org