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SNMP
Power over LAN Solutions 52 Catalog Number: 06-6910-056
7.3.1 Management Information Base (MIB)
The MIB contains the essential objects which compose the management data
for the unit. The MIB defines the objects to be managed for a TCP/IP network
and provides a format for each object.
The MIB is defined as an object tree, divided into logically related groups of
objects, such as: system, interfaces, ip, tcp, udp, snmp, etc… The MIB
provides for an extensible design to add public and private objects.
7.3.2 Security
The community profile provides for limited security when accessing the unit’s
data. A community name is assigned within the SNMP agent or manager. The
network management application can access data on the unit, only if its knows
the community name. The unit’s software will allow the user to specify the IP
address for which requests will be accepted.
7.3.3 SNMP Agent
The software for an SNMP agent or manager is installed on the unit which is to
receive SNMP information. As such, an SNMP agent is provided by Windows
and by system manufacturers.
7.3.4 Traps
A limited number of unsolicited messages or traps, are sent from a unit to an
SNMP application. These messages, sent by an SNMP agent on the unit, can
notify an SNMP application of a change in status.
7.3.5 Operations
An SNMP application can read values for the SNMP objects -to monitor units-
and some applications can also modify variables –for remote management of
units. Basic operations include:
! ! ! ! Get – gets a specific SNMP object for a unit
! ! ! ! Get next – gets the next object in a table or list
!
! !
! Set – sets the value of an SNMP object on a unit
!
! !
! Trap – sends a message about an event to the management application.