Creating a Basic SNMP Trap Configuration
8-38 SNMP Configuration
Example
Thisexampleshowshowto:
• CreateanSNMPcommunitycalledmgmt.
• ConfigureatrapnotificationcalledTrapSink.
Thistrapnotificationwillbesentwiththecommunitynamemgmttotheworkstation
192.168.190.80(whichistargetaddresstr).Itwillusesecurityandauthorizationcriteriacontained
inatargetparametersentry
calledv2cExampleParams.
C2(su)->set snmp community mgmt
C2(su)->set snmp targetparams v2cExampleParams user mgmt
security-model v2c message-processing v2c
C2(su)->set snmp notify entry1 tag TrapSink
C2(su)->set snmp targetaddr tr 192.168.190.80 param v2cExampleParams taglist
TrapSink
How SNMP Will Use This Configuration
Inordertosendatrap/notificationrequestedbyaMIBcode,theSNMPagentrequiresthe
equivalentofatrap“door”,a“key”tounlockthedoor,anda“procedure”forcrossingthe
doorstep.Todetermineifalltheseelementsare inplace,theSNMPagentproceedsasfollows:
1. Determinesif
the“keys”fortrap“doors”doexist.Intheexampleconfigurationabove,the
keythatSNMPislookingforisthenotificationentrycreatedwiththesetsnmpnotify
commandwhich,inthiscase,isakeylabele dentry1.
2. Searchesforthedoorsmatchingsuchakey.Forexample,the
parameterssetfortheentry1key
showsthatitopensonlythedoorTrapSink.
3. VerifiesthatthespecifieddoorTrapSinkis,infact,available.Inthiscaseitwasbuiltusingthe
setsnmptargetaddrcommand.Thiscommandalsospecifiesthatthisdoorleadstothe
managementstation192.168.190.80,and
the“procedure”(targetparams)tocrossthedoorstep
iscalledv2ExampleParams.
4. Verifiesthatthev2ExampleParamsdescriptionofhowtostepthroughthedooris,infact,
there.Theagentcheckstargetparamsentriesanddeterminesthisdescriptionwasmadewith
thesetsnmptargetparamscommand,whichtellsexactlywhichSNMPprotocol
touseand
whatcommunitynametoprovide.Inthiscase,thecommunity nameismgmt.
5. Verifiesthatthemgmtcommunitynameisavailable.Inthiscase,ithasbeenconfiguredusing
thesetsnmpcommunitycommand.
6. Sendsthetrapnotificationmessage.
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