Chapter 4: Web management
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NS3550-8T-2S Industrial Managed Switch User Manual
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Simple Network Management Protocol (SNMP)
SNMP overview
The Simple Network Management Protocol (SNMP) is an application layer protocol that
facilitates the exchange of management information between network devices. It is part
of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite. SNMP
permits network administrators to manage network performance, find and solve network
problems, and plan for network growth.
An SNMP-managed network consists of the following:
•
Network management stations (NMSs)
: Sometimes called consoles, these
devices execute 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.
•
Agents
: Agents are software modules that reside in network elements. They collect
and store management information such as the number of error packets received by
a network element.
•
Management information base (MIB
): An MIB is a collection of managed objects
residing in a virtual information 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.
