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Revision as of 12:34, 19 January 2011

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==== Matching SNMPv1 OIDs ====

==== Matching SNMPv1 OIDs ====

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SNMPv1 traps fall into two broad categories: ''generic'' and ''enterprise specific''. Generic traps use ''trap types'' 0 through 5, and do not use the ''specific type''. To match a generic trap, the traphandle OID should be the SNMPv2-MIB::snmpTraps OID, with an additional final OID of the ''trap type'' + 1. For example, to match linkDown traps (''specific type'' 2), the correct OID would be "1.3.6.1.6.3.1.1.5.3" (or SNMPv2-MIB::snmpTraps.3, which is also IF-MIB::linkDown).

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SNMPv1 traps fall into two broad categories: ''generic'' and ''enterprise specific''. Generic traps use ''trap types'' 0 through 5, and do not use the ''specific type''. To match a generic trap, the traphandle OID should be the SNMPv2-MIB::snmpTraps OID, with an additional final OID of the ''trap type'' + 1. For example, to match linkDown traps (''trap type'' 2), the correct OID would be "1.3.6.1.6.3.1.1.5.3" (or SNMPv2-MIB::snmpTraps.3, which is also IF-MIB::linkDown).

   ''SNMPv2-MIB::snmpTraps   1.3.6.1.6.3.1.1.5''

   ''SNMPv2-MIB::snmpTraps   1.3.6.1.6.3.1.1.5''

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    SNMPv2-MIB::authenticationFailure 1.3.6.1.6.3.1.1.5.'''5'''

    SNMPv2-MIB::authenticationFailure 1.3.6.1.6.3.1.1.5.'''5'''

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When the ''specific type'' is 6, the trap is an ''enterprise specific'' trap. When matching these traps, the traphandle OID is constructed using the enterprise OID and ''specific type'' specified in the trap. Earlier in the tutorial, we sent a SNMPv1 enterprise specific trap with an enterprise OID of UCD-TRAP-TEST-MIB::demotraps, a ''trap type'' of 6 and a ''specific type'' of 17. To match this trap type, the traphandle OID should be the enterprise OID, plus 0, plus the ''specific type''. So the correct OID would be ".1.3.6.1.4.1.2021.13.990.0.17" (or UCD-TRAP-TEST-MIB::demoTrap).

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When the ''trap type'' is 6, the trap is an ''enterprise specific'' trap. When matching these traps, the traphandle OID is constructed using the enterprise OID and ''specific type'' specified in the trap. Earlier in the tutorial, we sent a SNMPv1 enterprise specific trap with an enterprise OID of UCD-TRAP-TEST-MIB::demotraps, a ''trap type'' of 6 and a ''specific type'' of 17. To match this trap type, the traphandle OID should be the enterprise OID, plus 0, plus the ''specific type''. So the correct OID would be ".1.3.6.1.4.1.2021.13.990.0.17" (or UCD-TRAP-TEST-MIB::demoTrap).

==== Matching SNMPv2 OIDs ====

==== Matching SNMPv2 OIDs ====

TUT:Configuring snmptrapd - Revision history

Dts12: Fix generic/specific type - reported by Jacek Poplawski