Additional SNMP-based interface error metrics into the Smarts monitoring

Products

• VMware Smart Assurance
• Network Observability

Issue/Introduction

This article explains the raw SNMP Performance OIDs polled by the Smarts Instrumentation Class for interfaces and ports, along with their derived performance metrics and event thresholds.

Environment

All supported Smarts releases

Resolution

Raw SNMP Performance OIDs

The following tables raw SNMP Performance OIDs polled by Smarts Instrumentation Class for interface/port, along with their associated derived performance metrics and events:

Instrumentation Class	MIB Source	Attribute	OID
NetworkAdapter_PerformanceData_MIB2	RFC1213-MIB ifEntry	ifSpeed ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors	1.3.6.1.2.1.2.2.1.5 1.3.6.1.2.1.2.2.1.10 1.3.6.1.2.1.2.2.1.11 1.3.6.1.2.1.2.2.1.12 1.3.6.1.2.1.2.2.1.13 1.3.6.1.2.1.2.2.1.14 1.3.6.1.2.1.2.2.1.15 1.3.6.1.2.1.2.2.1.16 1.3.6.1.2.1.2.2.1.17 1.3.6.1.2.1.2.2.1.18 1.3.6.1.2.1.2.2.1.19 1.3.6.1.2.1.2.2.1.20
NetworkAdapter_PerformanceData_ifMIB	IF-MIB ifXEntry RFC1213-MIB (32-bit fallback)	ifHighSpeed ifHCInOctets ifHCInUcastPkts ifHCInMulticastPkts ifHCInBroadcastPkts ifHCOutOctets ifHCOutUcastPkts ifHCOutMulticastPkts ifHCOutBroadcastPkts ifInDiscards, ifInErrors, ifInUnknownProtos ifOutDiscards, ifOutErrors	1.3.6.1.2.1.31.1.1.1.15 1.3.6.1.2.1.31.1.1.1.6 1.3.6.1.2.1.31.1.1.1.7 1.3.6.1.2.1.31.1.1.1.8 1.3.6.1.2.1.31.1.1.1.9 1.3.6.1.2.1.31.1.1.1.10 1.3.6.1.2.1.31.1.1.1.11 1.3.6.1.2.1.31.1.1.1.12 1.3.6.1.2.1.31.1.1.1.13 1.3.6.1.2.1.2.2.1.13/.14/.15 1.3.6.1.2.1.2.2.1.19/.20
NetworkAdapter_PerformanceData_MIB2_ifMIB	Mix of MIB2 & ifMIB	ifHighSpeed, ifHCInOctets, ifHCOutOctets (64-bit), 32-bit ifIn/OutUcastPkts, ifIn/OutNUcastPkts, ifIn/OutDiscards, ifIn/OutErrors, ifInUnknownProtos	Same OIDs as above
Port_Performance_dot3_Ethernet	EtherLike-MIB dot3StatsEntry	dot3StatsAlignmentErrors dot3StatsFCSErrors dot3StatsSingleCollisionFrames dot3StatsMultipleCollisionFrames dot3StatsExcessiveCollisions dot3StatsFrameTooLongs	1.3.6.1.2.1.10.7.2.1.2 1.3.6.1.2.1.10.7.2.1.3 1.3.6.1.2.1.10.7.2.1.4 1.3.6.1.2.1.10.7.2.1.5 1.3.6.1.2.1.10.7.2.1.9 1.3.6.1.2.1.10.7.2.1.13
Port_Performance_etherStat_Ethernet	RMON etherStatsEntry	etherStatsCRCAlignErrors etherStatsUndersizePkts etherStatsFragments etherStatsCollisions	1.3.6.1.2.1.16.1.1.1.8 1.3.6.1.2.1.16.1.1.1.9 1.3.6.1.2.1.16.1.1.1.11 1.3.6.1.2.1.16.1.1.1.13
ic-dot3-duplex.asl	EtherLike-MIB	dot3StatsDuplexStatus	1.3.6.1.2.1.10.7.2.1.19

 

Thresholds and Events for network adapter: Techdoc for reference

Event	Trigger Condition	Threshold Attribute (Default)
HighUtilization	CurrentUtilization > UtilizationThreshold	UtilizationThreshold = 60%
HighErrorRate	Input/OutputPacketErrorPct > ErrorThreshold	ErrorThreshold = 10.0% (gated by ErrorTrafficThreshold 2.0 / MinTrafficThreshold 2.0)
HighDiscardRate	Input/OutputPacketDiscardPct > DiscardThreshold	DiscardThreshold = 5.0%
HighQueueDropRate	Input/OutputPacketQueueDropPct > QueueDropThreshold	QueueDropThreshold = 1.0%
HighBroadcastRate	InputPacketBroadcastPct > BroadcastThreshold	BroadcastThreshold = 20%
HighCollisionRate	CollisionPct > CollisionThreshold	CollisionThreshold = 10%

 

NOTE:

• A sustained rise in dot3StatsFCSErrors (1.3.6.1.2.1.10.7.2.1.3) on a Port_Performance_dot3_Ethernet-instrumented port drives up dot3StatsFCSErrorsRate, which — once past MinimumErrorRate and ErrorThreshold — sets HighErrorRateActive_Computed_Dot3 → HighErrorRateActive_Computed → HighErrorRateActive, causing the HighErrorRate event to be generated.