User guide

Rev 3.0D Jul.09 98
11
11: SNMP : Simple Network
Management Protocol
• SNMP Configuration
• SNMP MIB Definition
Sample
TheSimpleNetworkManagementProtocol(SNMP)was
designedtoallowremotemanagementandmonitoringofa
varietyofdevicesfromacentrallocation.TheSNMP
managementsystemisgenerallycomposedofagents(suchas
yourRavenXT,arouter,aUPS,awebserver,afileserver,or
othercomputerequipment)
andaNetworkManagement
Station(NMS)whichmonitorsalltheagentsonaspecific
network.Usingthemanagementinformationbase(MIB),an
NMScanincludereporting,networktopologymapping,tools
toallowtrafficmonitoringandtrendanalysis,anddevice
monitoring.
AuthenticationensuresSNMPmessagescomingfromthe
agent,suchastheRavenXT,havenotbeenmodifiedandthe
agentmaynotbequeriedbyunauthorizedusers.SNMPv3
usesaUser‐BasedSecurityModel(USM)toauthenticateand,
ifdesiredorsupported,messageencryption. USMusesauser
nameandpassword
specifictoeachdevice.
TheRavenXTcanbeconfiguredasanSNMPagentand
supportsSNMPv2candSNMPv3.
Management Information Base (MIB)
Themanagementinformationbase(MIB)isatypeofdatabase
usedtocompiletheinformationfromthevariousSNMP
agents.Reportsfromvariousagents,suchastheRavenXT,are
sentasdatainformdesignedtobeparsedbytheNMSintoits
MIB.Thedataishierarchicalwithentries
addressedthrough
objectidentifiers.
SNMP Traps
SNMPtrapsarealertsthatcanbesentfromthemanaged
devicetotheNetworkManagementStationwhenanevent
happens.YourRavenXTiscapableofsendingthelinkUptrap
whenthenetworkconnectionbecomesavailable.