perl module / object value / oid translation

i'm seeing a discrepancy in the value returned by a command-line get
versus a get originating from within the Perl SNMP.pm. and i'm wanting
tips on what i can do to trouble-shoot this further.

#### COMMAND-LINE ####
guru> snmpget -c public ja-b-rtr ciscoFlashPartitionFileCount.2.1
CISCO-FLASH-MIB::ciscoFlashPartitionFileCount.2.1 = Wrong Type (should be
Gauge32 or Unsigned32): INTEGER: 2
guru>


#### PERL MODULE ####
guru> cat test
#!/opt/vdops/bin/perl
use strict;
use warnings;
use SNMP;
my ($sess, $val);
#$SNMP::debugging = 2;
$sess = new SNMP::Session ( Community => 'public',
DestHost => 'ja-b-rtr',
);
#$val = $sess->get(".1.3.6.1.4.1.9.9.10.1.1.4.1.1.6.2.1");
$val = $sess->get("ciscoFlashPartitionFileCount.2.1");
print "val = $val\n";
guru>
guru>./test
val = NOSUCHOBJECT
guru>


#### PACKET TRACES ####

i've sniffed on both experiences
(https://vishnu.fhcrc.org/net-snmp/ja-b-rtr.works and
https://vishnu.fhcrc.org/net-snmp/ja-b-rtr.broken) ... both the request
*and* the response are identical ... i.e. i can see the answer of "2"
coming back in both cases.

if i flip the two get statements, then the answer comes back correctly,
i.e.



#### OID vs OBJECT VALUE ####

using the OID instead of the object value:
$val = $sess->get(".1.3.6.1.4.1.9.9.10.1.1.4.1.1.6.2.1");

gives me an answer of '2' instead of NOSUCHOBJECT.


so ... looks like the 'translate' function correctly translates
'ciscoFlashPartitionFileCount.2.1' into an OID on the way out ... but has
trouble reversing the process on the way back.

the command-line translate works just fine:

guru> snmptranslate -On -IR ciscoFlashPartitionFileCount.2.1
..1.3.6.1.4.1.9.9.10.1.1.4.1.1.6.2.1
guru> snmptranslate .1.3.6.1.4.1.9.9.10.1.1.4.1.1.6.2.1
CISCO-FLASH-MIB::ciscoFlashPartitionFileCount.2.1
guru>


#### DEBUGGING ####

i tried running my script with "$SNMP::debugging = 2" set ... the results
are visible at https://vishnu.fhcrc.org/net-snmp/perl-snmp-bug.txt ... i
don't see any problems with the parsing and loading of CISCO-FLASH-MIB ...

here are the relevant chunks from the CISCO-FLASH-MIB file:

CiscoFlashPartitionEntry ::=
SEQUENCE {
ciscoFlashPartitionIndex Unsigned32,
ciscoFlashPartitionStartChip Integer32,
ciscoFlashPartitionEndChip Integer32,
ciscoFlashPartitionSize Unsigned32,
ciscoFlashPartitionFreeSpace Gauge32,
ciscoFlashPartitionFileCount Gauge32,
ciscoFlashPartitionChecksumAlgorithm INTEGER,
ciscoFlashPartitionStatus INTEGER,
ciscoFlashPartitionUpgradeMethod INTEGER,
ciscoFlashPartitionName DisplayString,
ciscoFlashPartitionNeedErasure TruthValue,
ciscoFlashPartitionFileNameLength Integer32
}

ciscoFlashPartitionFileCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Count of all files in a flash partition. Both
good and bad (deleted or invalid checksum) files
will be included in this count.
"
::= { ciscoFlashPartitionEntry 6 }


#### WHATS NEXT ####

would anyone have tips on how i could analyze this issue more deeply?


tia,

--sk

stuart kendrick
fhcrc


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