Supported QoS monitoring metrics and formulas

Use information to understand the supported metrics and formulas that are used for polling the IP SLA enabled Cisco, NQA enabled Huawei, and RPM enabled Juniper devices in your network. The generic term IP SLA is used to mean the QoS monitoring in all devices.

The Network Performance Insight Formula Service calculates metric values for the data that is collected by SNMP Collector. It uses formulas that are deployed against specific entity types.

Metrics that are derived from these formulas give insight on the impact of network traffic load on overall quality of latency sensitive network services. For example, voice call and video streaming quality. Typically, IP SLA handles the following types of metrics:

Delay
Packet Loss
Jitter
Packet Sequence
Connectivity
Path
Downtime

Normalized IP SLA KPIs that are displayed on Network Performance Insight® Dashboards from different vendors.

Table 1. Normalized IP SLA KPIs that are displayed on Network Performance Insight Dashboards from different vendors.
SLA Test	Name on dashboards	Cisco KPI	Huawei KPI	Juniper KPI
Echo: echo tcpConnect udpEcho	`Probe Count (count)`	`echoProbeCount`	`nqaProbeCount`	`jnxEchoProbeCount`
	`Probe Loss (%)`	`echoProbeLoss`	`nqaProbeLoss`	`jnxPingEchoProbeLoss`
	`Probe Succeeded (%)`	`echoProbeSucceeded`	`nqaProbeSucceeded`	`jnxPingEchoProbeSucceeded`
	`RTT (ms)`	`echoRtt`	`nqaRttMax`	`jnxPingEchoRtt`
jitter	`Inbound Jitter (ms)`	`jitterAvgInbound`	`nqaJitterAvgInbound`	`jnxPingJitterMaxInbound`
	`Outbound Jitter (ms)`	`jitterAvgOutbound`	`nqaJitterAvgOutbound`	`jnxPingJitterMaxOutbound`
	`Inbound One Way Latency (ms)`	`jitterAvgInboundOneWay`	`nqaJitterAvgInboundOneWay`	`jnxPingAvgInbound`
	`Outbound One Way Latency (ms)`	`jitterAvgOutboundOneWay`	`nqaJitterAvgOutboundOneWay`	`jnxPingAvgOutbound`
	`Inbound Packet Loss (%)`	`jitterPacketLossInbound`	`nqaJitterPacketLossInbound`	Not supported
	`Outbound Packet Loss (%)`	`jitterPacketLossOutbound`	`nqaJitterPacketLossOutbound`	Not supported
voip Note: In Network Performance Insight, voip includes jitter and codecType.	`Inbound Jitter (ms)`	`jitterAvgInbound`	Not supported	Not supported
	`Outbound Jitter (ms)`	`jitterAvgOutbound`
	`Inbound One Way Latency (ms)`	`jitterAvgInboundOneWay`
	`Outbound One Way Latency (ms)`	`jitterAvgOutboundOneWay`
	`Inbound Packet Loss (%)`	`jitterPacketLossInbound`
	`Outbound Packet Loss (%)`	`jitterPacketLossOutbound`
	`MOS (count)`	`voipMos`
rtp	`Inbound Jitter (ms)`	`rtpInterArrivalJitterInbound`	Not supported	Not supported
	`Outbound Jitter(ms)`	`rtpInterArrivalJitterOutbound`
	`Inbound One Way Latency (ms)`	`rtpAvgInbound`
	`Outbound One Way Latency (ms)`	`rtpAvgOutbound`
	`Inbound Packet Loss (%)`	`rtpPacketLossInbound`
	`Outbound Packet Loss (%)`	`rtpPacketLossOutbound`
	`RTT (ms)`	`rtpRtt`
http	`RTT (ms)`	`httpRtt`	`nqaHttpRttMax`	`jnxPingHttpRtt`
	`DNS RTT (ms)`	`httpDnsRtt`	`nqaHttpDnsRttMax`	Not supported
	`TCP Connect RTT (ms)`	`httpTcpConnectRtt`	`nqaHttpTcpConnectRttMax`	Not supported