BSD 4_3 release
[unix-history] / usr / man / man4 / ddn.4
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95f51977 1.\" @(#)ddn.4 6.2 (Berkeley) 5/16/86
da29eb96 2.\"
95f51977 3.TH DDN 4 "May 16, 1986"
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4.UC 6
5.SH NAME
6ddn \- DDN Standard Mode X.25 IMP interface
7.SH SYNOPSIS
8.B "device ddn0 at uba0 csr 166740 vector ddnintr"
9.SH DESCRIPTION
10The
11.I ddn
12device provides a DDN Standard Mode X.25 interface to an IMP using
13the ACC ACP625 X.25 board. It is normally used for connecting to
14the Defense Data Network (DDN). The controller itself is not accessible
15to users, but instead provides a network interface for the
16Internet Protocol described in
71d64def
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17.IR ip (4P).
18.SH SEE ALSO
19intro(4N), ip(4P)
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20.SH DIAGNOSTICS
21.BR "ddn%d: not alive" .
22The initialization routine was entered even though the device
23did not autoconfigure. This indicates a system problem.
24.PP
25.BR "ddn%d: failed getting UBA resources for lcn %d" .
26Insufficient UNIBUS resources existed to initialize the device.
27This is likely to be a shortage of UNIBUS mapping registers.
28.PP
29.BR "ddn%d: couldn't get X25 init buffer" .
30This indicates that an
31.I mbuf
32could not be allocated for sending the initialization message to the
33ACP625.
34.PP
35.BR "DDN: illegal X25 address length!"
36.br
37.BR "DDN: illegal X25 address format!"
38.br
39These errors indicate a problem with the called X.25 address received
40from the IMP on an incoming call.
41.PP
42.BR "X25 RESET on lcn = %d" .
43This indicates that an unexpected X.25 RESET was received on the
44indicated LCN.
45.PP
46.BR "X25 INTERRUPT on lcn = %d, code = %d" .
47This indicates that an unexpected X.25 INTERRUPT Packet was received on the
48indicated LCN.
49.PP
50.BR "ddn%d: failed to get supr msg bfr!" .
51This indicates that an
52.I mbuf
53could not be allocated for sending a supervisor message to the
54ACP625.
55.PP
56Any other error message from ddn%d: indicates a serious error
57detected by either the driver or the ACP625 firmware.