Mibs - D-Link DES-3250TG User Manual

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 invalid SNMP community string. The switch automatically stores the source IP
address of the unauthorized user.
• 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.
• New Root – This trap is sent by the switch whenever a new root port is elected within an STP
group.
• 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.
• Save to NV-RAM – This trap is sent whenever "Save all configuration of device to NV-RAM"
has been processed.
• File Transfer Status Change – This trap is sent for file transfer status change notification.
• Set to Factory Default – The trap is sent whenever the "Set to factory default setting" has
been processed.

MIBs

Management and counter information are stored in the Switch in the Management Information Base
(MIB). The Switch uses the standard MIB-II Management Information Base module. Consequently,
values for MIB objects can be retrieved from any SNMP-based network management software. In
addition to the standard MIB-II, the Switch also supports its own proprietary enterprise MIB as an
extended Management Information Base. These MIBs may also be retrieved by specifying the MIB's
Object-Identity (OID) at the network manager. MIB values can be either read-only or read-write.
Read-only MIBs variables can be either constants that are programmed into the Switch, or variables
that change while the Switch is in operation. Examples of read-only constants are the number of port
and type of ports. Examples of read-only variables are the statistics counters such as the number of
errors that have occurred, or how many kilobytes of data have been received and forwarded through a
port.
Read-write MIBs are variables usually related to user-customized configurations. Examples of these are
the Switch's IP Address, Spanning Tree Algorithm parameters, and port status.
If you use a third-party vendors' SNMP software to manage the Switch, a diskette listing the Switch's
propriety enterprise MIBs can be obtained by request. If your software provides functions to browse or
modify MIBs, you can also get the MIB values and change them (if the MIBs' attributes permit the write
operation). This process however can be quite involved, since you must know the MIB OIDs and retrieve
them one by one.
D-Link DES-3250TG Standalone Layer 2 Switch
15