IP-SLA as traffic generator

From: Bit Gossip (bit.gossip@chello.nl)
Date: Thu Sep 25 2008 - 07:54:10 ART


Dear group,
I was trying to use ip-sla as traffic generator but I can get only
marginal amount of traffic no matter what I set in the num-packets: in
the example attached I configured num-packets 10000 but only a couple
seem to be sent for real, the remaining being skipped.
I am using dynamips, may this be the reason?
Thanks,
Bit.

R0#show running-config | s ip sla
ip sla 10
 udp-jitter 192.168.255.255 20000 num-packets 10000 interval 4
 frequency 206
ip sla schedule 10 life forever start-time now

R0#show ip sla statistics 10 details
IPSLAs Latest Operation Statistics

IPSLA operation id: 10
        Latest RTT: 5 milliseconds
Latest operation start time: *22:33:28.611 UTC Wed Sep 24 2008
Latest operation return code: OK
RTT Values:
        Number Of RTT: 2 RTT Min/Avg/Max: 4/5/7
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
        Source to Destination Latency one way Sum/Sum2: 0/0
        Destination to Source Latency one way Sum/Sum2: 0/0
Jitter Time:
        Number of SD Jitter Samples: 1
        Number of DS Jitter Samples: 1
        Source to Destination Jitter Min/Avg/Max: 0/0/0 milliseconds
        Destination to Source Jitter Min/Avg/Max: 3/3/3 milliseconds
        Source to destination positive jitter Min/Avg/Max: 0/0/0
<...>
Interarrival jitterin: 0
        Over thresholds occurred: FALSE
Packet Loss Values:
        Loss Source to Destination: 0 Loss Destination to
Source:
0
        Out Of Sequence: 0 Tail Drop: 0 Packet Late Arrival: 0
Packet Skipped: 9998 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Voice Score Values:
        Calculated Planning Impairment Factor (ICPIF): 0
        Mean Opinion Score (MOS): 0
Number of successes: 4
Number of failures: 0

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