Traps - D-Link DGS-3208TG - Switch User Manual

In addition, you can also set in the Switch an IP Address for a gateway or a router. It is useful when the
management station is not located on the same network as the Switch, making it necessary for the Switch to
go through a gateway or router to reach the network manager.
For security, you can set in the Switch a list of IP Addresses of the network managers that you allow to
manage the Switch. You can also change the default Community Name in the Switch and set access rights of
these Community Names.

Traps

Trap managers are special users of the network who are given certain rights and access in overseeing the
maintenance of the network. Trap managers can receive traps sent from the Switch; they must immediately
take certain actions to avoid future failure or breakdown of the network.
Traps are messages that alert you 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 network manager (trap managers). The following lists the types of events that
can take place on the Switch.
System resets
Errors
Status changes
Topology changes
Operation
You can also specify which network managers may receive traps from the Switch by setting a list of IP
Addresses of the authorized network managers.
The following are trap types a trap manager will receive:
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.
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 an addressee (or manager/user) on the Switch is not
a valid user of the Switch and may have entered an incorrect community name.
New Root This trap indicates that the Switch has become the new root of the Spanning Tree, the trap
is sent by a bridge soon after its election as the new root. This implies that upon expiration of the
Topology Change Timer the new root trap is sent out immediately after the Switch's selection as a new
root.
Topology Change A Topology Change trap is sent by the Switch when any of its configured ports
transitions from the Learning state to the Forwarding state, or from the Forwarding state to the
Blocking state. The trap is not sent if a new root trap is sent for the same transition.
Link Change Event This trap is sent whenever the link of a port changes from link up to link down or
from link down to link up.
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Gigabit Ethernet Switch User's Guide