Planet IGS-801T [28/120] Snmp overview
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Planet IGS-801T [28/120] Snmp overview

User’s Manual of IGS-801M
4.2.4
4.2.4.1 SNMP Overview
The Simple Network Management ) is an application layer protocol that facilitates the exchange of
management information between n rotocol/Internet Protocol
(TCP/IP) protocol suite. SNMP enables network administrators to manage network performance, find and solve network
problem w
An SNMP-managed network consists nagement stations (NMSs), SNMP agents,
Management information base (MIB) and network-management protocol：
。 Network management stati te management
applications that monitor and control network elements. Physically, NMSs are usually engineering
workstation-caliber computers with fast CPUs, megapixel color displays, substantial memory, and abundant disk
space. At least one NMS must be present in each managed environment.
les that reside in network elements. They collect and store management
n
store. Collections of related managed objects are defined in specific MIB modules.
。 Network-management protocol：A management protocol is used to convey management information between
agents and NMSs. SNMP is the Internet community's de facto standard management protocol.
SNMP Operations
SNMP itself is a simple request/response protocol. NMSs can send multiple requests without receiving a response.
。 Get -- Allows the NMS to retrieve an object instance from the agent.
。 Set -- Allows the NMS to set values for object instances within an agent.
。 Trap -- Used by the agent t. The SNMPv2 trap message is
designed to replace the SNMPv1 trap message.
SNMP community
An SNM y is the group that anagement stations running SNMP belong to. It helps define where
informati he community nam n
one SNMP community. It will not respond to
communities. SNMP default communiti
。 Write = private
。 Read = public
SNMP
Protocol (SNMP
etwork devices. It is part of the Transmission Control P
s, and plan for network gro th.
of three key components: Network ma
ons (NMSs)：Sometimes called consoles, these devices execu
。 Agents：Agents are software modu
information such as the number of error packets received by a network element.
。 Management information base (MIB)：A MIB is a collection of managed objects residing in a virtual informatio
to asynchronously inform the NMS of some even
P communit devices and m
on is sent. T e is used to identify the group. A SNMP device or agent may belong to more tha
requests from management stations that do not belong to one of its
es are:
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