I have a generated a small enterprise MIB to represent some QoS objects
(traffic classes, queue lengths, drops, tail drops, etc) for particular
system. The whole thing is driven by a Perl pass-persist extension
script (using SNMP::Extension::PassPersist). With one exception it all
works fine - objects get populated and the tables can be walked.
The exception is a table that is optional. That is a table consisting
of a name and a counter that may not exist - all depends on the
underling configuration. Provided the object ("DSCP WRED Map") exists
all is fine:
VM-1:$ snmpwalk -v2c -c public localhost ATT-VROUTER-QOS-
MIB::qosDSCPWREDMapTable
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapEntry.1.7.0.0.0.1 = INTEGER: 1
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapEntry.1.7.1.0.0.1 = INTEGER: 1
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapEntry.1.10.0.0.0.1 = INTEGER: 1
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapEntry.1.10.1.0.0.1 = INTEGER: 1
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapName.7.0.0.0.1 = STRING: test
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapName.7.1.0.0.1 = STRING: test
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapName.10.0.0.0.1 = STRING: test
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapName.10.1.0.0.1 = STRING: test
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapDropPkts.7.0.0.0.1 = Counter64: 0
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapDropPkts.7.1.0.0.1 = Counter64: 0
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapDropPkts.10.0.0.0.1 = Counter64: 0
ATT-VROUTER-QOS-MIB::qosDSCPWREDMapDropPkts.10.1.0.0.1 = Counter64: 0
VM-1:$
But if the underlying object has not been defined, I get:
VM-1:$ snmpwalk -v2c -c public localhost ATT-VROUTER-QOS-
MIB::qosDSCPWREDMapTable
ATT-VROUTER-QOS-MIB::qosShaperClass.7.0 = INTEGER: 7
Error: OID not increasing: ATT-VROUTER-QOS-MIB::qosDSCPWREDMapTable
>= ATT-VROUTER-QOS-MIB::qosShaperClass.7.0
VM-1:$ snmpwalk -On -v2c -c public localhost ATT-VROUTER-QOS-
MIB::qosDSCPWREDMapTable
.1.3.6.1.4.1.74.1.32.1.1.1.1.1.7.0 = INTEGER: 7
Error: OID not increasing: .1.3.6.1.4.1.74.1.32.1.5.1
>= .1.3.6.1.4.1.74.1.32.1.1.1.1.1.7.0
VM-1:$
The OID ".1.3.6.1.4.1.74.1.32.1.1.1.1.1.7.0" is the very first element
of the MIB, i.e. the PassPersist module is walking the objects and this
is the very first element. But why the complaint?
Is there anything I can do to get PassPersist to return "no such
object"?
Thanks,
Mark
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