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Introduction to SNMP
1
SNMP Simplified
SNMP Commands
E/OS SNMP Support Manual
1-2
able to issue is overwhelming, and every new manageable device can
increase the list. SNMP was created to allow all these things to be
easily done on any growing network.
SNMP operates on a simple fetch/store concept. With SNMP the
available transactions between manager and agent are limited to a
handful. The manager can request information from the agent or
modify variables on the agent. The agent can respond to a request by
sending information, or if enabled to do so, voluntarily notify the
manager of a change of status on the agent (issue a trap).
With SNMP, administrators can manage the switch configuration,
faults, performance, accounting, and security from remote SNMP
management stations.
SNMP is the only network management protocol that is widely
available from many vendors of TCP/IP networks and
internetworks.
SNMP:
•
Allows network management with a simple set of commands.
•
Allows new devices added to a network to be easily managed
with minimal intervention.
•
Is adequate for many basic network management needs.
•
Is generalized for application to networks other than TCP/IP,
such as IPX and OSI.
•
Provides considerable versatility for managing a great many
types of devices.
•
Allows all networks to employ the same method for
management.
A manager requests information from an agent by sending a single
command, the Get command. The Get command also has a variation
(GetNextRequest) that permits more efficient operation:
•
GetRequest – Requests the value of a specified variable on the
agent. This command is used to retrieve management data.
•
GetNextRequest – Requests the value of the next variable after
the one specified in the command. This command is used to
retrieve lists and tables of management data.
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