# IPSLA UDP Jitter Statistics - ASR9K

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For a technical analysis see: IOS IP SLAs UDP Jitter Operation Technical Analysis.

### Jitter

Jitter is inter-packet delay variance, i.e. the distance between successive packets.

Statistic | What it means |
---|---|

NumOfJitterSamples | The number of jitter samples collected. This is the number of jitter samples that are used to calculate the following jitter statistics. |

MinOfPositivesSD | The minimum of positive jitter values from source to destination, in milliseconds |

MaxOfPositivesSD | The maximum of positive jitter values from source to destination, in milliseconds. |

NumOfPositivesSD | The number of jitter samples from source to destination that are positive (i.e., network latency increases for two consecutive test packets) |

SumOfPositivesSD | The sum of those positive jitter values (in milliseconds). |

Sum2PositivesSD | The sum of squares of those positive values. |

MinOfNegativesSD | The minimum of negative jitter values from source to destination. The absolute value is given. |

MaxOfNegativesSD | The maximum of negative jitter values from source to destination. The absolute value is given. |

NumOfNegativesSD | The number of jitter values from source to destination that are negative (i.e., network latency decreases for two consecutive test packets). |

SumOfNegativesSD | The sum of negative jitter values. |

Sum2NegativesSD | The sum of the squares of negative jitter values. |

Interarrival jitterout | The source to destination (SD) jitter value calculation, as defined in RFC 1889. |

Interarrival jitterin | The destination to source (DS) jitter value calculation, as defined in RFC 1889. |

### One Way Jitter

One Way Values Indicates that one way measurement statistics appear on the following lines.

One Way (OW) Values are the amount of time it took the packet to travel from the source router to the target router (SD) or from the target router to the source router (DS).

Statistic | What it means |
---|---|

NumOfOW | Number of successful one way time measurements. |

OWMinSD | Minimum time from the source to the destination. |

OWMaxSD | Maximum time from the source to the destination. |

OWSumSD | Sum of the OWMinSD and OWMaxSD values. |