IP-sla udp-jitter / one-way delay no output

Question

Hi *,
i have a question regarding "ip sla udp-jitter".
On some connectins i get an output for the "show ip sla stat" for the _one-way delay_
on other links i don't get an output. The Configuration is always the same and the Probes are running.
NTP is configured but in my opinion the fact weather i get output for the _one-way delay_
or not depends on the ntp root despersion.
Is there a max allowed time differances between the two routes ?
Here one working / one not working output of the same Router but different peers:
Not working::
Latest operation return code: OK
RTT Values:
Number Of RTT: 100RTT Min/Avg/Max: 11/11/13 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
Working:
Latest operation return code: OK
RTT Values:
Number Of RTT: 100RTT Min/Avg/Max: 12/13/14 milliseconds
Latency one-way time:
Number of Latency one-way Samples: 100
Source to Destination Latency one way Min/Avg/Max: 6/7/8 milliseconds
Destination to Source Latency one way Min/Avg/Max: 5/6/7 milliseconds
I hope one of you can help me to find / fix the problem,
Thanks in advance / Emanuel

Answer 1

Hi everyone,
I have the same doubt.
I did a ip sla configuration on 1841 and 7206VXR and don't show nothing in one-way delay.
----------------------7206---------------------
-ip sla monitor responder
-ip sla monitor 1
- type jitter dest-ipaddr 10.9.105.14 dest-port 16384 source-ipaddr 10.8.20.102  codec g711alaw
- tos 184
-ip sla monitor schedule 1 start-time now
-ntp peer 10.9.105.14
HOST)#show ip sla sta
Round Trip Time (RTT) for       Index 1
        Latest RTT: 507 milliseconds
Latest operation start time: 10:57:36.619 UTC Sun Oct 10 2010
Latest operation return code: OK
RTT Values:
        Number Of RTT: 1000             RTT Min/Avg/Max: 125/507/846 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 Jitter Samples: 999
        Source to Destination Jitter Min/Avg/Max: 1/1/6 milliseconds
        Destination to Source Jitter Min/Avg/Max: 1/5/23 milliseconds
Packet Loss Values:
        Loss Source to Destination: 0           Loss Destination to Source: 0
        Out Of Sequence: 0      Tail Drop: 0    Packet Late Arrival: 0
Voice Score Values:
        Calculated Planning Impairment Factor (ICPIF): 17
        Mean Opinion Score (MOS): 3.84
Number of successes: 38
Number of failures: 0
Operation time to live: 1347 sec
-------------------------1841-------------------------------
-ip sla monitor responder
-ip sla monitor 1
- type jitter dest-ipaddr 10.8.20.102 dest-port 16384 source-ipaddr 10.9.105.14 codec g711alaw
- tos 184
-ip sla monitor schedule 1 start-time now
-ntp peer 10.8.20.102
3383)#show ip sla monitor statistic
Round trip time (RTT)   Index 1
        Latest RTT: 614 ms
Latest operation start time: 10:50:50.491 UTC Wed Oct 27 2010
Latest operation return code: OK
RTT Values
        Number Of RTT: 999
        RTT Min/Avg/Max: 347/614/867 ms
Latency one-way time milliseconds
        Number of one-way Samples: 0
        Source to Destination one way Min/Avg/Max: 0/0/0 ms
        Destination to Source one way Min/Avg/Max: 0/0/0 ms
Jitter time milliseconds
        Number of SD Jitter Samples: 997
        Number of DS Jitter Samples: 998
        Source to Destination Jitter Min/Avg/Max: 0/6/19 ms
        Destination to Source Jitter Min/Avg/Max: 0/1/3 ms
Packet Loss Values
        Loss Source to Destination: 1           Loss Destination to Source: 0
        Out Of Sequence: 0      Tail Drop: 0    Packet Late Arrival: 0
Voice Score Values
        Calculated Planning Impairment Factor (ICPIF): 20
MOS score: 3.72
Number of successes: 32
Number of failures: 0
Operation time to live: 1668 sec