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Using extended pings with TOS tags to troubleshoot VOIP?

Our Gatekeepers are 2000 miles from the IP phones.

I am attempting to use the extended ping feature of a Cisco router to see if the layer 3 DSCP 46 tag is staying on the packet and where the jitter and packet loss are occurring?

Does the following tell me anything or not?

The gatekeeper is 1.2.3.4 and I am pinging from the other side of the country where the ip phones are.

Extended ping: 1000 times without TOS and with TOS set to 184 EF 46

I calculated the jitter myself by subtracting the min from the max times.

Tracing the route to ping from  1.2.3.4

  1 2.3.4.5 0 msec 0 msec 4 msec         "no tos min/avg/max = 1/1/12 ms"
                                                          "with tos min/avg/max = 1/1/12 ms" jitter 11ms
 

  2 3.4.5.6     12 msec 12 msec 12 msec  "no tos min/avg/max = 8/12/32 ms"
                                                             "with tos min/avg/max = 8/11/32 ms" jitter 24ms

  3 4.5.6.7      12 msec 16 msec 20 msec "no tos min/avg/max = 12/14/36 ms"
                                                             "with tos min/avg/max = 12/14/36 ms" jitter 24ms
 

  4 5.6.7.8      16 msec 12 msec 12 msec "no tos min/avg/max = 12/14/36 ms"
                                                             "with tos min/avg/max = 12/14/36 ms" jitter 24ms
 

  5 6.7.8.9     72 msec 72 msec 76 msec "no tos min/avg/max = 68/72/112 ms"
                                                            "with qos min/avg/max = 68/72/104 ms" jitter 36ms
 

  6 10.11.12.13        72 msec 68 msec 68 msec " min/avg/max = 68/72/92 ms"
                                                              "with tos min/avg/max = 68/72/88 ms" jitter 20ms


  7 1.2.3.4 72 msec 72 msec 72 msec      "no tos min/avg/max = 68/72/88 ms"
                                                              "with tos min/avg/max = 68/72/88 ms" jitter 20ms
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Dragon0x40
Asked:
Dragon0x40
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1 Solution
 
nociSoftware EngineerCommented:
You need pchar to calculate this for you... (pchar can also use TOS or not) and can vary packet sizes etc.

http://www.kitchenlab.org/www/bmah/Software/pchar/

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Rick HobbsRETIREDCommented:
What is your IP connection? (Cable, FIOS, Point-to-Point)
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nociSoftware EngineerCommented:
I let it run with some small parameters (few repetitions, large packet increase)
This is what it reports: (on the fifth & sixth hops)

 5: 195.69.144.167 (te1-1.cr1.ams2.network.is.nl)
    Partial loss:      0 / 15 (0%)
    Partial char:      rtt = 16.597803 ms, (b = 0.008898 ms/B), r2 = 0.988776
                       stddev rtt = 1.107275, stddev b = 0.000948
    Partial queueing:  avg = 0.000405 ms (5059 bytes)
    Hop char:          rtt = --.--- ms, bw = 34042.553191 Kbps
    Hop queueing:      avg = -0.006910 ms (0 bytes)
 6: 213.133.37.29 (te7-1.cr1.ams3.network.is.nl)
    Partial loss:      0 / 15 (0%)
    Partial char:      rtt = 17.334285 ms, (b = 0.008983 ms/B), r2 = 0.992318
                       stddev rtt = 0.834654, stddev b = 0.000790
    Partial queueing:  avg = 0.001290 ms (15463 bytes)
    Hop char:          rtt = 0.736483 ms, bw = 94117.647059 Kbps
    Hop queueing:      avg = 0.000884 ms (10404 bytes)
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