D-Link DES-1526, Manual

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public - Allows authorized management stations to retrieve MIB
objects.
private - Allows authorized management stations to retrieve and
modify MIB objects.
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). Typical traps
include trap messages for Device boot up, Authentication Failure,
Port status change, and Abnormal transmit/receive data packet
error.
MIBs
Management and counter information are stored by the Midspan
in the Management Information Base (MIB). The DES-1526 uses
the standard MIB-II Management Information Base module and
Power over Ethernet MIB (RFC3621). Consequently, values for
MIB objects can be retrieved from any SNMP-based network
management software. In addition, the DES-1526 also supports
its own proprietary enterprise MIB as an extended Management
Information Base. The proprietary MIB may also be retrieved by
specifying the MIB Object Identifier. MIB values can be either
read-only or read-write.
Enabled / Disabled: To enable or disable the SNMP function on
the Switch.
SNMP Community / Trap: To configure the SNMP
Community or SNMP Trap configuration.