Monitoring Session Activity - Nortel 5399 User Manual

Chapter 1 Network Administration
Model 5399 Remote Access Concentrator Network Administrator's Guide for UNIX
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Monitoring Session Activity

The 5399 RAC provides two superuser CLI commands that display
information about the state of the 5399's serial ports: control
and tap.
The superuser CLI control command is a diagnostic tool that, for a
specified port, allows you to set DTR and RTS or output a short test
message. The superuser CLI tap command accesses (wire taps) a serial
port from a terminal.
The tap command will not work with PPP.
Using tap, you can:
• Observe the output to the port. The command also displays
keystrokes entered from your terminal as output to the port you
are tapping as if they had been entered on the port.
• Find out exactly what users are seeing on their terminals from a
remote location.
• Provide on-line advice and instructions to users at their
terminals.
• Monitor traffic in both directions on the port, especially
incoming special conditions, such as line breaks and special
characters.
Under certain circumstances, the order of displayed data may not match
the actual time sequence of the events. All input and output data is
displayed. Special characters and control line changes are stored in a
limited buffer. If these changes occur too rapidly, they may be lost.
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