NAME
ddn —
DDN Standard Mode X.25 IMP
network interface
SYNOPSIS
ddn0 at uba0 csr 166740 vector ddnintr
DESCRIPTION
NOTE: This driver has not been ported from
4.4BSD yet.
The
ddn device provides a DDN Standard Mode X.25 interface to
an IMP using the ACC ACP625 X.25 board. It is normally used for connecting to
the Defense Data Network (DDN). The controller itself is not accessible to
users, but instead provides a network interface for the Internet Protocol
described in
ip(4).
DIAGNOSTICS
- ddn%d: not alive.
- The initialization routine was entered even though the
device did not autoconfigure. This indicates a system problem.
- ddn%d: failed getting UBA resources for
lcn %d."
- Insufficient UNIBUS resources existed to initialize the
device. This is likely to be a shortage of UNIBUS mapping registers.
- ddn%d: couldn't get X25 init
buffer.
- This indicates that an mbuf could not be
allocated for sending the initialization message to the ACP625.
- DDN: illegal X25 address
length!
- DDN: illegal X25 address
format!
- These errors indicate a problem with the called X.25
address received from the IMP on an incoming call.
- X25 RESET on lcn = %d.
- This indicates that an unexpected X.25 RESET was received
on the indicated LCN.
- X25 INTERRUPT on lcn = %d, code =
%d.
- This indicates that an unexpected X.25 INTERRUPT Packet
was received on the indicated LCN.
- ddn%d: failed to get supr msg
bfr!
- This indicates that an mbuf could not be
allocated for sending a supervisor message to the ACP625.
Any other error message from ‘
ddn%d:
’
indicates a serious error detected by either the driver or the ACP625
firmware.
SEE ALSO
ip(4),
netintro(4)
HISTORY
The
ddn interface appeared in
4.3BSD.