Smarts PM: CurrentUtilization information is missing from configured Host Interfaces

Products

• VMware

Issue/Introduction

Symptoms:




CurrentUtilization information is missing from configured Host Interfaces

Environment

VMware Smart Assurance - SMARTS

Cause

The 64-bit counter is not supported in the MIB as required for interface speeds greater than 20 Mbit/s. The 64 bit counter needs to be supported for interface speeds greater than 20 Mbit/s within the MIB as specified in RFC 2863 Section 3.1.6, "Counter Size." The following is an excerpt from this section:

"For interfaces that operate at 20,000,000 (20 million) bits per second or less, 32-bit byte and packet counters MUST be supported.  For interfaces that operate faster than 20,000,000 bits/second, and slower than 650,000,000 bits/second, 32-bit packet counters MUST be supported and 64-bit octet counters MUST be supported. For interfaces that operate at 650,000,000 bits/second or faster, 64-bit packet counters AND 64-bit octet counters MUST be supported."

 

The 64 bit counters are ifHCInOctets (1.3.6.1.2.1.31.1.1.1.6)  and ifHCOutOctets (1.3.6.1.2.1.31.1.1.1.10). The 32 bit counters are ifInOctets (1.3.6.1.2.1.2.2.1.10) and ifOutOctets (1.3.6.1.2.1.2.2.1.16).

Resolution

To resolve this issue, do the following:

1. Execute an SNMP walk to verify the 64-bit ifHCInOctets and ifHCOoutOctets exist for interface speeds greater than 20 Mbit/s, as follows:
   
   <BASEDIR>/IP/smarts/bin/sm_snmp -c <community string> -s 2c -d <device name> walk .1.3.6.1.2.1.31.1.1.1
   
    
2. If the 64-bit counter is missing from the walk return and your network supports interface speeds greater than 20 Mbit/s, contact the device vendor.  Otherwise, contact EMC Smarts Support and quote this solution ID.

Additional Information

Only SNMPv2 and SNMPv3 supports 64 bit counters.  If you are discovering the device using SNMP v1, ifHCInOctets and ifHCOutOctets oids will not exist.