D-Link DES-3250TG User Manual page 32

DES-3250TG Layer 2 Fast Ethernet Switch User's Guide
Traps
Traps are messages that alert network personnel of events that
occur on the Switch. The events can be as serious as a reboot
(someone accidentally turned OFF the Switch), or less serious
like a port status change. The Switch generates traps and
sends them to the trap recipient (or network manager).
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 ten trap recipient IP
addresses, and ten 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.
• System Restart – This trap contains the reboot
information.
• Authentication Failure – This trap signifies that
someone has tried to logon to the switch using an
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