RFC2790 monitored partition shows invalid value in OneClick

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

Dx NetOps Spectrum any version

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. It is recommended you contact the vendor in regards to the SNMP agent. 

Additional Information

References: 

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