[c-nsp] IP SLA - all zero's for latency one-way measurements

[Blake Dunlap]

Check your clock sync.

On Thu, Aug 27, 2015 at 6:53 AM, Aaron <aaron1 at gvtc.com> wrote:
> Anyone know why I would be seeing zero's for latency ?  It just seems to
> come and go. sometimes I see all zero's and other times I see numbers that
> seem realistic.  I would expect some latency. actually about 7 milliseconds
> of round trip latency is expected.. But zero latency seems weird to me.
>
>
>
>
>
> This is today..
>
>
>
> tower-43-901#sh ip sla stat | in Latency one way Min/Avg/Max
>
>         Source to Destination Latency one way Min/Avg/Max: 0/0/1
> milliseconds
>
>         Destination to Source Latency one way Min/Avg/Max: 6/6/7
> milliseconds
>
>         Source to Destination Latency one way Min/Avg/Max: 3/3/4
> milliseconds
>
>         Destination to Source Latency one way Min/Avg/Max: 3/3/4
> milliseconds
>
>
>
> This was yesterday.
>
>
>
> tower-43-901#sh ip sla statistics  | in Latency one way Min/Avg/Max
>
>         Source to Destination Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
>         Destination to Source Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
>         Source to Destination Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
>         Destination to Source Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
> tower-43-901#
>
> tower-43-901#sh ip sla statistics
>
> IPSLAs Latest Operation Statistics
>
>
>
> IPSLA operation id: 24300
>
> Type of operation: udp-jitter
>
>         Latest RTT: 6 milliseconds
>
> Latest operation start time: 14:23:35 CDT Wed Aug 26 2015
>
> Latest operation return code: OK
>
> RTT Values:
>
>         Number Of RTT: 10               RTT Min/Avg/Max: 6/6/7 milliseconds
>
> Latency one-way time:
>
>         Number of Latency one-way Samples: 0
>
>         Source to Destination Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
>         Destination to Source Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
> Jitter Time:
>
>         Number of SD Jitter Samples: 9
>
>         Number of DS Jitter Samples: 9
>
>         Source to Destination Jitter Min/Avg/Max: 0/1/1 milliseconds
>
>         Destination to Source Jitter Min/Avg/Max: 0/1/1 milliseconds
>
> Over Threshold:
>
>         Number Of RTT Over Threshold: 0 (0%)
>
> Packet Loss Values:
>
>         Loss Source to Destination: 0
>
>         Source to Destination Loss Periods Number: 0
>
>         Source to Destination Loss Period Length Min/Max: 0/0
>
>         Source to Destination Inter Loss Period Length Min/Max: 0/0
>
>         Loss Destination to Source: 0
>
>         Destination to Source Loss Periods Number: 0
>
>         Destination to Source Loss Period Length Min/Max: 0/0
>
>         Destination to Source Inter Loss Period Length Min/Max: 0/0
>
>         Out Of Sequence: 0      Tail Drop: 0
>
>         Packet Late Arrival: 0  Packet Skipped: 0
>
> Voice Score Values:
>
>         Calculated Planning Impairment Factor (ICPIF): 0
>
>         Mean Opinion Score (MOS): 0
>
> Number of successes: 17
>
> Number of failures: 0
>
> Operation time to live: Forever
>
>
>
>
>
> IPSLA operation id: 24310
>
> Type of operation: udp-jitter
>
>         Latest RTT: 6 milliseconds
>
> Latest operation start time: 14:23:35 CDT Wed Aug 26 2015
>
> Latest operation return code: OK
>
> RTT Values:
>
>         Number Of RTT: 10               RTT Min/Avg/Max: 6/6/7 milliseconds
>
> Latency one-way time:
>
>         Number of Latency one-way Samples: 0
>
>         Source to Destination Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
>         Destination to Source Latency one way Min/Avg/Max: 0/0/0
> milliseconds
>
> Jitter Time:
>
>         Number of SD Jitter Samples: 9
>
>         Number of DS Jitter Samples: 9
>
>         Source to Destination Jitter Min/Avg/Max: 0/0/0 milliseconds
>
>         Destination to Source Jitter Min/Avg/Max: 0/1/1 milliseconds
>
> Over Threshold:
>
>         Number Of RTT Over Threshold: 0 (0%)
>
> Packet Loss Values:
>
>        Loss Source to Destination: 0
>
>         Source to Destination Loss Periods Number: 0
>
>         Source to Destination Loss Period Length Min/Max: 0/0
>
>         Source to Destination Inter Loss Period Length Min/Max: 0/0
>
>         Loss Destination to Source: 0
>
>         Destination to Source Loss Periods Number: 0
>
>         Destination to Source Loss Period Length Min/Max: 0/0
>
>         Destination to Source Inter Loss Period Length Min/Max: 0/0
>
>         Out Of Sequence: 0      Tail Drop: 0
>
>         Packet Late Arrival: 0  Packet Skipped: 0
>
> Voice Score Values:
>
>         Calculated Planning Impairment Factor (ICPIF): 0
>
>         Mean Opinion Score (MOS): 0
>
> Number of successes: 17
>
> Number of failures: 0
>
> Operation time to live: Forever
>
>
>
>
>
> tower-43-901#
>
>
>
>
>
>
>
> Aaron
>
>
>
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