Safe-Mode - HP 7102dl - ProCurve Secure Router Configuration Manual

Overview
CLI Tools
N o t e
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The showtech.txt file is saved to internal flash. If you intend to use a compact
flash card to transport the file, you must save the showtech.txt file to a
compact flash card.
The showtech.txt file contains a readout of many of the show commands. This
readout allows a network administrator to pinpoint a router configuration
problem without a connection to the router. To display the contents of the
showtech.txt file, enter show file flash showtech.txt from the enable mode
context.
To have the router display the show tech readout without creating or saving
a showtech.txt file, use the terminal option:
Syntax: show tech terminal
ProCurve# show tech terminal

safe-mode

SafeMode is a CLI feature that allows you to perform configuration changes
without the fear of being disconnected from a Telnet or SSH session. Some
configuration changes can interrupt network connectivity. If you are
managing a router remotely via SSH or Telnet, you can inadvertently lose your
connection to the router.
For example, you may need to apply an ACL, but this ACL doesn't allow Telnet
or SSH traffic. Once you applied the ACL, you would be locked out of the
router. In order to fix the configuration that has locked you out, you would
need physical access to the router so that you could establish a console session
with it. SafeMode allows you to make configuration changes using Telnet or
SSH without worrying about losing your connection and being unable to
reestablish it.
SafeMode requires you to periodically reset a reload timer. If the reload timer
runs out before you reset it, the Secure Router OS will assume that the current
running configuration has disrupted your connection to the router. It will save
the running-config to internal flash as "problem-config" and reboot the router.
Once the router has reloaded, it will display a reboot cause message and load
the currently saved startup-configuration file. The startup-config should allow
you to regain access to the router. You will then be able to review the saved
problem-config file and correct the setting that caused the disruption.