1.\" Copyright (c) 1983, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)ddn.4 6.5 (Berkeley) 03/27/91 7.\" 8.Dd 9.Dt DDN 4 vax 10.Os BSD 4.3 11.Sh NAME 12.Nm ddn 13.Nd 14.Tn DDN 15Standard Mode 16.Tn X.25 17.Tn IMP 18interface 19.Sh SYNOPSIS 20.Cd "device ddn0 at uba0 csr 166740 vector ddnintr" 21.Sh DESCRIPTION 22The 23.Nm ddn 24device provides a 25.Tn DDN 26Standard Mode 27.Tn X.25 28interface to an 29.Tn IMP 30using 31the 32.Tn ACC ACP625 33.Tn X.25 34board. It is normally used for connecting to 35the Defense Data Network 36.Pq Tn DDN . 37The controller itself is not accessible 38to users, but instead provides a network interface for the 39Internet Protocol described in 40.Xr ip 4 . 41.Sh DIAGNOSTICS 42.Bl -diag 43.It ddn%d: not alive. 44The initialization routine was entered even though the device 45did not autoconfigure. This indicates a system problem. 46.Pp 47.It ddn%d: failed getting UBA resources for lcn %d." 48Insufficient 49.Tn UNIBUS 50resources existed to initialize the device. 51This is likely to be a shortage of 52.Tn UNIBUS 53mapping registers. 54.Pp 55.It ddn%d: couldn't get X25 init buffer. 56This indicates that an 57.Em mbuf 58could not be allocated for sending the initialization message to the 59.Tn ACP Ns 625. 60.Pp 61.It DDN: illegal X25 address length! 62.It DDN: illegal X25 address format! 63These errors indicate a problem with the called 64.Tn X.25 65address received 66from the 67.Tn IMP 68on an incoming call. 69.Pp 70.It X25 RESET on lcn = %d. 71This indicates that an unexpected 72.Tn X.25 73.Tn RESET 74was received on the 75indicated 76.Tn LCN . 77.Pp 78.It X25 INTERRUPT on lcn = %d, code = %d. 79This indicates that an unexpected 80.Tn X.25 81.Tn INTERRUPT 82Packet was received on the 83indicated 84.Tn LCN . 85.Pp 86.It ddn%d: failed to get supr msg bfr! 87This indicates that an 88.Em mbuf 89could not be allocated for sending a supervisor message to the 90.Tn ACP625 . 91.El 92.Pp 93Any other error message from 94.Ql ddn%d: 95indicates a serious error 96detected by either the driver or the 97.Tn ACP Ns 625 98firmware. 99.Sh SEE ALSO 100.Xr netintro 4 , 101.Xr ip 4 102.Sh HISTORY 103The 104.Nm 105interface appeared in 106.Bx 4.3 . 107