Smarts IP: Receive 'mangled or incorrect packet; parsing aborted and data' error when running sm_snmpwalk

Products

• VMware Smart Assurance

Issue/Introduction

Symptoms:




Receive "mangled or incorrect packet; parsing aborted and data" error when running sm_snmpwalk
Message similar to the following is seen from the Smarts IP system command line when running sm_snmpwalk:

D:\InCharge7\IP\smarts\bin>sm_snmpwalk.exe --fmt="walk" -c xxx  fw302lu.abc.def.eu.int
Saving MIB walk to file(s) 'fw302lu.abc.def.eu.int.walk' ...
SNMP-N-EPARSER-Mangled or incorrect packet; parsing aborted and data
discarded; in file
"L:/FOUNDATION-7.0.2.X-HF/17/smarts/snmp/lib/SNMP_Parser.c" at line 1211

The OID generating the problem is found in the Smarts IP dump file to be .1.3.6.1.4.1.94.1.21.1.10.5.0 as follows:

VarBind -> SEQUENCE (0x30), 20 bytes: 
OBJ-ID (0x06), 12 bytes == ".1.3.6.1.4.1.94.1.21.1.10.4.0" 
GAUGE-32 (0x42), 4 bytes == 1995011748 
VarBind -> SEQUENCE (0x30), 21 bytes: 
OBJ-ID (0x06), 12 bytes == ".1.3.6.1.4.1.94.1.21.1.10.5.0" 
UNKNOWN(71) (0x47), *Error!*  Incorrect data type.

 

The .1.3.6.1.4.1.94.1.21.1.10.5.0 OID belongs to ipsoKernMaxMem and the Data Type defined for this OID in the device's MIB definition has SYNTAX UInteger32 as in the following:

ipsoKernMaxMem  OBJECT-TYPE 
SYNTAX UInteger32
UNITS  "Bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
   "The maximum amount of kernel memory. "

Environment

VMware Smart Assurance - SMARTS

Cause

The Smarts sm_snmpwalk utility does not support the UInteger32 deprecated Data Type. The UInteger32 is defined in RFC 1442 dated April 1993. In RFC 1902 dated Jan 1996, UInteger32 was removed from the standard SMIv2 data types and replaced by Unsigned32.

Resolution

Smarts is working as designed. Contact your SNMP agent vendor to resolve this issue.

Additional Information

The device does not show that error when walking it with a third party tool but the OID ".1.3.6.1.4.1.94.1.21.1.10.5.0" is not present in the walk output.