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DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
52 Switch Management and Operating Concepts
• New Root This trap indicates that the Switch has
become the new root of the Spanning Tree, the trap is
sent by the switch 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 election as the new
root.
• Topology Change (STP) 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 Up This trap is sent whenever the link of a port
changes from link down to link up.
• Link Down This trap is sent whenever the link of a
port changes from link up to link down.
SNMP
The Simple Network Management Protocol (SNMP) is an OSI
layer 7 (the application layer) protocol for remotely monitoring
and configuring network devices. SNMP enables network
management stations to read and modify the settings of
gateways, routers, switches, and other network devices. SNMP
can be used to perform many of the same functions as a
directly connected console, or can be used within an integrated
network management software package such as DView.
SNMP performs the following functions: