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DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Switch Management and Operating Concepts 51
accidentally turned OFF the Switch), or less serious like a port
status change. The Switch generates traps and sends them to
the network manager (trap recipient).
Trap recipients are special users of the network who are given
certain rights and access in overseeing the maintenance of the
network. Trap recipients will receive traps sent from the Switch;
they must immediately take certain actions to avoid future
failure or breakdown of the network.
You can also specify which network managers may receive
traps from the Switch by entering a list of the IP addresses of
authorized network managers. Up to four trap recipient IP
addresses, and four corresponding SNMP community strings
can be entered.
SNMP community strings function like passwords in that the
community string entered for a given IP address must be used
in the management station software, or a trap will be sent.
The following are trap types the switch can send to a trap
recipient:
• Cold Start This trap signifies that the Switch has
been powered up and initialized such that software
settings are reconfigured and hardware systems are
rebooted. A cold start is different from a factory reset
in that configuration settings saved to non-volatile
RAM used to reconfigure the switch.
• Warm Start This trap signifies that the Switch has
been rebooted, however the POST (Power On Self-Test)
is skipped.
• Authentication Failure This trap signifies that
someone has tried to logon to the switch using an
invalid SNMP community string. The switch
automatically stores the source IP address of the
unauthorized user.