No data displayed after overriding an interface's speed in CA Performance Management (CAPM)

Products

• CA Infrastructure Management
• CA Performance Management - Usage and Administration

Issue/Introduction

After changing the Speed In/Out Override for an interface to 20,000,000 the interface stops displaying data 

Environment

DX NetOps 20.2.x CAPM and later

Cause

By setting the speed to 20,000,000 from a speed greater than 20,000,000 you are telling CAPM to use a different set of counters (64bit vs 32bit). In this case, the interface was not displaying proper data on the low speed metrics and thus dashboards began displaying "No Data to Display" errors.

High Speed Interface Vendor Certification formula:

(CalculatedSpeedIn > 20000000 && isdef(ifHCInOctets) && ifHCInOctets > 0) ? (ifHCInOctets*8) : (ifInOctets <= 786432000 ? (ifInOctets*8) : null) 

Resolution

Instead of overriding the speed to 20,000,000 override it to 20,000,001 as the cutoff in the vendor certification is anything > than 20,000,000 will use the 64bit OID values.