Supported Cisco IP SLA formulas

Use information to understand the supported metrics and formulas that are used to poll from the IP SLA enabled Cisco devices in your network.

Metric names are the same as the names of the formulas that generate them in the poll definition. The following tables provide metrics that are related to different Cisco IP SLA operations in Network Performance Insight®:

HTTP
Jitter
VoIP
RTP
Echo

Metrics and formulas for different SLA tests

Table 1. Resource type: `cisco.probe.http`
Metric	Formula	Units	Description
`Probe.HTTP.DNS.RTT.ms`	`rttMonLatestHTTPOperDNSRTT`	Milliseconds	The sum of RTT to perform a Domain Name Server Query (DNS) within the HTTP operations.
`Probe.HTTP.RTT.ms`	`rttMonLatestHTTPOperRTT`	Milliseconds	If a successful test is completed since the last poll, return the sum of the round-trip time (RTT) of successful HTTP operations.
`Probe.HTTP.TCP-Connect.RTT.ms`	`rttMonLatestHTTPOperTCPConnectRTT`	Milliseconds	The sum of RTT taken to perform a TCP connection to the HTTP server.
`Probe.HTTP.Total.Transaction.RTT.ms`	`rttMonLatestHTTPOperTransactionRTT`	Milliseconds	The sum of Round Trip Time (RTT) taken to download the object that is specified by URL within HTTP operations.
`Probe.HTTP.Transaction.Failed.Percent`	`100 * (not(rttMonLatestHTTPOperSense==1))`	Percent	The percentage of request that has HTTP errors when downloading the base page within HTTP operations. If no errors return 0, otherwise return 100.
`Probe.HTTP.Transaction.Succeeded.Percent`	`100 * ((rttMonLatestHTTPOperSense==1))`	Percent	The percentage of request that had no HTTP errors when downloading the base page within HTTP operations. If no errors return 100, otherwise return 0.

Table 2. Resource type: `cisco.probe.jitter`
Metric	Formula	Units	Description
`Probe.Jitter.Inbound.Avg.ms`	`(rttMonLatestJitterOperSumOfPositivesDS +rttMonLatestJitterOperSumOfNegativesDS) /(rttMonLatestJitterOperNumOfRTT - 1)`	Milliseconds	If a successful probe is sent since the last poll, return the average inbound jitter.
`Probe.Jitter.Inbound.Negative.Max.ms`	`rttMonLatestJitterOperMaxOfNegativesDS`	Milliseconds	If a successful probe is sent since the last poll, return the maximum inbound negative jitter.
`Probe.Jitter.Inbound.Packet.Loss.Percent`	`100 * rttMonLatestJitterOperPacketLossDS /rttMonEchoAdminNumPackets`	Percent	If a test is completed since the last poll, return the percentage of inbound packets lost.
`Probe.Jitter.Inbound.Positive.Max.ms`	`rttMonLatestJitterOperMaxOfPositivesDS`	Milliseconds	If a successful probe is sent since the last poll, return the maximum inbound positive jitter.
`Probe.Jitter.Succeeded.Percent`	`100 * rttMonLatestJitterOperNumOfRTT /rttMonEchoAdminNumPackets`	Percent	If a successful probe is sent since the last poll, return the average outbound jitter.
`Probe.Jitter.Outbound.Negative.Max.ms`	`rttMonLatestJitterOperMaxOfNegativesSD`	Milliseconds	If a successful probe is sent since the last poll, return the maximum outbound negative jitter.
`Probe.Jitter.Outbound.Packet.Loss.Percent`	`100 * rttMonLatestJitterOperPacketLossSD /rttMonEchoAdminNumPackets`	Percent	If a test is completed since the last poll, return the percentage of outbound packets lost.
`Probe.Jitter.Outbound.Positive.Max.ms`	`rttMonLatestJitterOperMaxOfPositivesSD`	Milliseconds	If a successful probe is sent since the last poll, return the maximum outbound positive jitter.
`Probe.Jitter.Packet.Count`	`rttMonEchoAdminNumPackets`	Number	If a test is completed since the last poll, return the number of sent probes, otherwise return 0.
`Probe.Jitter.Packet.Loss.Percent`	`100 * (1 - rttMonLatestJitterOperNumOfRTT /rttMonEchoAdminNumPackets)`	Percent	If a test is completed since the last poll, return the number of sent probes, otherwise return 0.
`Probe.Jitter.Outbound.Avg.ms`	`(rttMonLatestJitterOperSumOfPositivesSD +rttMonLatestJitterOperSumOfNegativesSD) /(rttMonLatestJitterOperNumOfRTT - 1)`	Milliseconds	If a successful probe is sent since the last poll, return the average outbound jitter.
`Probe.Jitter.Packet.Loss.Unknown.Percent`	`100 * rttMonLatestJitterOperPacketMIA /rttMonEchoAdminNumPackets`	Percent	If a test is completed since the last poll, return the percentage of packets that are lost where the direction is unknown.
`Probe.Jitter.Inbound.One-way.Avg.ms`	`rttMonLatestJitterOperOWSumDS /rttMonLatestJitterOperNumOfRTT`	Milliseconds	The average of the delays that travel from destination to source for all the probes during the last test.
`Probe.Jitter.Outbound.One-way.Avg.ms`	`rttMonLatestJitterOperOWSumSD1 /rttMonLatestJitterOperNumOfRTT`	Milliseconds	The average of the delays that travel from source to destination for all the probes during the last test.

Table 3. Resource type: `cisco.probe.voip`
Metric	Formula	Units	Description
`Probe.VOIP.ICPIF`	`rttMonLatestJitterOperICPIF`	Number	The maximum of all Calculated Planning Impairment Factor (ICPIF) value for the jitter operations.
`Probe.VOIP.MOS`	`rttMonLatestJitterOperMOS/100`	Number	The maximum of all Mean Opinion Score (MOS) value for the jitter operations.
`Probe.Jitter.Inbound.Avg.ms`	`(rttMonLatestJitterOperSumOfPositivesDS +rttMonLatestJitterOperSumOfNegativesDS) /(rttMonLatestJitterOperNumOfRTT - 1)`	Milliseconds	If a successful probe is sent since the last poll, return the average inbound jitter.
`Probe.Jitter.Inbound.Negative.Max.ms`	`rttMonLatestJitterOperMaxOfNegativesDS`	Milliseconds	If a successful probe is sent since the last poll, return the maximum inbound negative jitter.
`Probe.Jitter.Inbound.Packet.Loss.Percent`	`100 * rttMonLatestJitterOperPacketLossSD /rttMonEchoAdminNumPackets`	Percent	If a test is completed since the last poll, return the percentage of inbound packets lost.
`Probe.Jitter.Inbound.Positive.Max.ms`	`rttMonLatestJitterOperMaxOfPositivesDS`	Milliseconds	If a successful probe is sent since the last poll, return the maximum inbound positive jitter.
`Probe.Jitter.Succeeded.Percent`	`100 * rttMonLatestJitterOperNumOfRTT /rttMonEchoAdminNumPackets`	Percent	If a successful probe is sent since the last poll, return the standard deviation of the round trip time.
`Probe.Jitter.Outbound.Negative.Max.ms`	`rttMonLatestJitterOperMaxOfNegativesSD`	Milliseconds	If a successful probe is sent since the last poll, return the maximum outbound negative jitter.
`Probe.Jitter.Outbound.Packet.Loss.Percent`	`100 * rttMonLatestJitterOperPacketLossSD /rttMonEchoAdminNumPackets`	Percent	If a test is completed since the last poll, return the percentage of outbound packets lost.
`Probe.Jitter.Outbound.Positive.Max.ms`	`rttMonLatestJitterOperMaxOfPositivesSD`	Milliseconds	If a test is completed since the last poll, return the percentage of outbound packets lost.
`Probe.Jitter.Packet.Count`	`rttMonEchoAdminNumPackets`	Number	If a test is completed since the last poll, return the number of sent probes, otherwise return 0.
`Probe.Jitter.Packet.Loss.Percent`	`100 * (1 - rttMonLatestJitterOperNumOfRTT /rttMonEchoAdminNumPackets)`	Percent	If a test is completed since the last poll, return the percentage of probes lost.
`Probe.Jitter.Outbound.Avg.ms`	`(rttMonLatestJitterOperRTTSum2 / rttMonLatestJitterOperNumOfRTT - ((rttMonLatestJitterOperRTTSum / rttMonLatestJitterOperNumOfRTT) ^ 2)) ^ 0.5`	Milliseconds	If a successful probe is sent since the last poll, return the standard deviation of the round-trip time.
`Probe.Jitter.Packet.Loss.Unknown.Percent`	`100 * rttMonLatestJitterOperPacketMIA /rttMonEchoAdminNumPackets`	Percent	If a test is completed since the last poll, return the percentage of packets that are lost where the direction is unknown.
`Probe.Jitter.Inbound.One-way.Avg.ms`	`rttMonLatestJitterOperOWSumDS /rttMonLatestJitterOperNumOfRTT`	Milliseconds	The average of the delays that travel from destination to source for all the probes during the last test.
`Probe.Jitter.Outbound.One-way.Avg.ms`	`rttMonLatestJitterOperOWSumSD /rttMonLatestJitterOperNumOfRTT`	Milliseconds	The average of the delays that travel from source to destination for all the probes during the last test.

Table 4. Resource type: `cisco.probe.rtp`
Metric	Formula	Units	Description
`Probe.RTP.Inbound.Jitter.Avg.ms`	`rttMonLatestRtpOperAvgOWDS`	Milliseconds	If a successful probe is sent since the last poll, return the maximum inbound time.
`Probe.RTP.Inbound.Early.Packets.Percent`	`100 * rttMonLatestRtpOperPacketEarlyDS /rttMonLatestRtpOperTotalPaksDS`	Percent	Number of early packets at source for the latest operation.
`Probe.RTP.Inbound.Frame.Loss.Count`	`rttMonLatestRtpOperFrameLossDS`	Percent	If a test is completed since the last poll, return the percentage of inbound frame lost.
`Probe.RTP.Inbound.Inter-Arrival.Jitter.ms`	`rttMonLatestRtpOperIAJitterDS`	Milliseconds	If a successful probe is sent since the last poll, return the maximum inbound jitter.
`Probe.RTP.Inbound.Late.Packets.Percent`	`100 * rttMonLatestRtpOperPacketLateDS /rttMonLatestRtpOperTotalPaksDS`	Percent	Number of late packets at source for the latest operation.
`Probe.RTP.Inbound.MOS-CQ`	`rttMonLatestRtpOperMOSCQDS`	Number	The average estimated inbound Mean Opinion Score for Conversational Quality (MOS-CQ).
`Probe.RTP.Inbound.MOS-LQ`	`rttMonLatestRtpOperMOSLQDS`	Number	The average estimated inbound Mean Opinion Score for Listening Quality (MOS-LQ).
`Probe.RTP.Inbound.Packet.Loss.Percent`	`100 * rttMonLatestRtpOperPacketLossDS /rttMonLatestRtpOperTotalPaksDS`	Percent	If a test is completed since the last poll, return the percentage of inbound packets lost.
`Probe.RTP.Inbound.R-Factor`	`rttMonLatestRtpOperRFactorDS`	Number	The average of estimated voice quality value that is transmitted from destination to source for the RTP operation.
`Probe.RTP.Outbound.Jitter.Avg.ms`	`rttMonLatestRtpOperAvgOWSD`	Milliseconds	If a successful probe is sent since the last poll, return the maximum outbound time.
`Probe.RTP.Outbound.Inter-Arrival.Jitter.ms`	`rttMonLatestRtpOperIAJitterSD`	Milliseconds	If a successful probe is sent since the last poll, return the maximum outbound jitter.
`Probe.RTP.Outbound.MOS-CQ`	`rttMonLatestRtpOperMOSCQSD`	Number	The average estimated outbound Mean Opinion Score for Conversational Quality (MOS-CQ).
`Probe.RTP.Outbound.Packet.Loss.Percent`	`100 * rttMonLatestRtpOperPacketLossSD /rttMonLatestRtpOperTotalPaksSD`	Percent	If a test is completed since the last poll, return the percentage of outbound packets lost.
`Probe.RTP.Outbound.R-Factor`	`rttMonLatestRtpOperRFactorSD`	Number	The average of estimated voice quality value that is transmitted from source to destination for the RTP operation.
`Probe.RTP.RTT.ms`	`rttMonLatestRtpOperRTT`	Milliseconds	If a successful test is completed since the last poll, return the round-trip time.
`Probe.RTP.Packet.Loss.Unknown.Percent`	`100 * rttMonLatestRtpOperPacketsMIA /rttMonLatestRtpOperTotalPaksSD`	Percent	If a test is completed since the last poll, return the percentage of packets that are lost where the direction is unknown.

Table 5. Resource type: `cisco.probe.echo`
Metric	Formula	Units	Description
`Probe.Echo.Probe.Count`	`not(rttMonLatestRttOperTime == last(rttMonLatestRttOperTime))`	Number	If a test is completed since the last poll, return 1, otherwise return 0.
`Probe.Echo.Probe.Loss.Percent`	`100 * not(rttMonLatestRttOperSense == 1)`	Percent	If a test is completed since the last poll, return the percentage of probes lost.
`Probe.Echo.Probe.Succeeded.Percent`	`100 * (rttMonLatestRttOperSense == 1)`	Percent	If a test is completed since the last poll, return the percentage of probes that succeeded.
`Probe.Echo.RTT.ms`	`rttMonLatestRttOperCompletionTime`	Milliseconds	If a successful test is completed since the last poll, return the round-trip time.

Note: The echo operation covers the following SLA test types:

echo
tcpConnect
udpEcho