Specifications

How Do I Implement SNMP?
March 28, 2011 Page 2 of 27
•Acommonmanagementplatformsupportedbymanynetworkdevices
How Do I Implement SNMP?
YoucanimplementSNMPonEnterasysswitchingdevicesusingsimpleCLIcommandsas
describedinthisdocument.Theconfigurationprocessinvolvesthefollowingtasks:
1. CreatingusersandgroupsallowedtomanagethenetworkthroughSNMP
2. Settingsecurityaccessrights
3. SettingSNMPManagementInformationBase(MIB)viewattributes
4. Settingtargetparameterstocontrolthe
formattingofSNMPnotificationmessages
5. SettingtargetaddressestocontrolwhereSNMPnotificationsaresent
6. SettingSNMPnotificationparameters(filters)
7. ReviewingSNMPst atistics
SNMP Overview
ItishelpfultounderstandthefollowingSNMPcomponentsdescribedinthissection:
Manager/Agent Model Components
SNMPprovidesamessageformatforcommunicationbetweenmanagersandagents,whichusea
MIBandarelativelysmallsetofcommandstoexchangeinformation.TheSNMPmanagercanbe
partofanetworkmanagementsystem,suchasEnterasysNetSight
®
,whiletheagentandMIB
resideontheswitch.
TheSNMPagentactsuponrequestsfromthemanagertoeithercollectdatafromtheMIBorset
dataintotheMIB.Arepositoryforinformationaboutdeviceparametersandnetworkdata,the
MIBisorganizedinatreestructurein
whichindividualvariablesarerepresentedasleavesonthe
branches.Auniqueobjectidentifier(OID)distinguisheseachvariableintheMIBandisthemeans
bywhichthemanagerandagentspecifywhichmanagedelementsarechanged.
Anagentcansendunsolicitednotificationmessages(alsoknownastrapsorinforms)alerting
the
SNMPmanagertoaconditiononthenetwork.Theseconditionsincludesuchthingsasimproper
userauthentication,restarts,linkstatus(upordown),MACaddresstracking,closingofaTCP
connection,lossofconnectiontoaneighbor,orothersignificantevents.
Message Functions
SNMPusesfivebasicmessagetypes(Get,GetNext,GetResponse,Set,andTrap)tocommunicate
betweenthemanagerandtheagent.TheGetandGetNextmessagesallowthemanagertorequest
For information about... Refer to page...
Manager/Agent Model Components 2
Message Functions 2
Access to MIB Objects 3