IP SLA - UDP Jitter

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Jul 23rd, 2010
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We configured IP SLA with UDP jitter operation in 3800 series router for monitoring the status of the WAN link in terms of jitter, one way latency and packet loss.

From the statistics, we can get results for Jitter but not one way latency and packet loss (always shows zero). (*both source and target routers are sync with NTP server)

I have provided the configuration, ip sla stats and debug output in the attachment. Please suggest what will be the issue.



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Hitesh Vinzoda Thu, 07/29/2010 - 03:09
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Sounds like a NTP issue because of value is 0

Time synchronization, such as that provided by NTP, is required between the source and the target device in order to provide accurate one-way delay (latency) measurements. To configure NTP on the source and target devices, perform the tasks in the “Performing Basic System Management” chapter of the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2. Time synchronization is not required for the one-way jitter and packet loss measurements, however. If the time is not synchronized between the source and target devices, one-way jitter and packet loss data will be returned, but values of “0” will be returned for the one-way delay measurements provided by the UDP jitter operation.


Hitesh Vinzoda

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