I P - D S U U s e r ’ s M a n u a l
02/02/08
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4.16 Loopback
Syntax: loopback [OFF | NET | PORT | BOTH]
The
loopback
command enables or disables loopbacks. The command has a single
argument indicating which type of loopback is requested:
NET, PORT, BOTH,
or
OFF
.
The command is only visible when the user is logged in.
The
NET
option enables a network loopback. It is the equivalent of a remote loopback
between two modems. Any data arriving from the peer
IP-DSU
will be sent back to the
originator until loopbacks are cancelled.
The
PORT
option enables a device loopback. It is the equivalent of a local loopback
between two modems. Any data arriving from the device is sent back to the device until
loopbacks are cancelled.
The
BOTH
option enables both network and device loopbacks. It is the aggregate of the
net and port loopback options.
The
OFF
option disables any loopback(s) in effect. Loopbacks are cumulative until
OFF
is specified, e.g., if a network loopback was enabled, and a device loopback was
subsequently enabled, the net effect is the same as if they were simultaneously enabled
using the
BOTH
option.
Loopbacks are transient conditions. A loopback may only be specified while the unit is
in-service, and does not survive a reset. Should the unit be reset for any reason (power
outage, manual reset, etc.), the
IP-DSU
will revert to a normal non-loopback mode of
operation.
4.17 Data Encryption
Syntax: encrypt [ on | off ]
The
encrypt
(or
enc
) command indicates if data is to be encrypted between peer
IP-
DSU
units over the IP Intranet or Internet. It is only visible when the unit is logged in. The
command has a single argument. The
on
option enables data encryption between peer
IP-DSU
units. The
off
option disables data encryption. The
IP-DSU
s at both ends of a
connection must have the same encryption state (either
on
or
off
).
PORT
Loopback
NET
Loopback
BNS-2000(2)
IP-DSU(1)
BNS-2000(1)
IP-DSU(2)
Intranet/
Internet
