Manual Engenius EWS5912FP (page 136 of 207) (English)

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SNMP

Simple Network Management Protocol (SNMP) is an

ApplicationLayerprotocoldesignedspecicallyfor

managing and monitoring network devices. Simple

Network Management Protocol (SNMP) is a popular

protocol for network management. It is used for

collectinginformationfromandconguringnetwork

devices such as; servers, printers, hubs, Switches, and

routers on an Internet Protocol (IP) network. SNMP is

used to exchange management information between

a network management system (NMS) and a network

device. A manager station can manage and monitor the

Switch through their network via SNMPv1, v2c and v3.

An SNMP managed network consists of two components;

agents and a manager.

An agent translates the local management information

from the managed Switch into a form that is

compatible with SNMP. SNMP allows a manager

and agents to communicate with each other for

the purpose of accessing Management Information

Bases (MIBs). SNMP uses an extensible design, where

theavailableinformationisdenedbyMIBs.MIBs

describe the structure of the management data of a

device subsystem; they use a hierarchical namespace

containingObjectIdentiers(OID).EachOIDidentiesa

variable that can be read or set via SNMP.

The manager is the console through which network ad-

ministrators perform network management functions.

Several versions of SNMP are supported. They are v1,

v2c,andv3.SNMPv1,whichisdenedinRFC1157“A

Simple Network Management Protocol (SNMP)”, is a stan-

dardthatdeneshowcommunicationoccursbetween

SNMP-capabledevicesandspeciestheSNMPmessage

types. Version 1 is the simplest and most basic of ver-

sions. There may be times where it’s required to support

olderhardware.SNMPv2c,whichisdenedinRFC1901

“IntroductiontoCommunity-BasedSNMPv2,”RFC1905,

“Protocol Operations for Version 2 of the Simple Network

ManagementProtocol(SNMPv2)”,andRFC1906“Trans-

port Mappings for Version 2 of the Simple Network Man-

agement Protocol (SNMPv2)”. SNMPv2c updates protocol

operations by introducing a GetBulk request and authen-

tication based on community names. Version 2c adds

several enhancements to the protocol, such as support

for “Informs”. Because of this, v2c has become the most

widely used version. Unfortunately, a major weakness

of v1 and v2c is security. To combat this, SNMP v3 adds

a security features that overcome the weaknesses in

v1 and v2c. . If possible, it is recommended that you use

v3- especially if you plan to transmit sensitive informa-

tion across unsecured links. However, the extra security

featuremakescongurationalittlemorecomplex.

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Engenius EWS5912FP Manual

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