rfc2790 monitored partition shows invalid value

Products

• Spectrum
• Network Observability

Issue/Introduction

While trying to add a partition under monitoring, Spectrum is showing 'Threshold cannot be evaluated'. Calculations of disk size shows "invalid value"

Environment

Version: Any

Cause

SNMP agents using integer32 can't process disk partitions higher than 1TB. You cannot store the value for 1 TB in an interger32 data type.

To verify, query the hrStorageSize 1.3.6.1.2.1.25.2.3.1.5 attribute in MIB Tools. If it shows a negative value, then that is the issue. Spectrum cannot process a negative value.

Resolution

This is a vendor issue on the SNMP agent used to gather the partition data. Recommend to contact the vendor in regards to the SNMP agent. 

Additional Information

References: 

Linux NET-SNMP agent: 
https://sourceforge.net/p/net-snmp/bugs/1837/