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[NoOp]

On 08/28/2008 08:05 PM, Carl Friis-Hansen wrote:
> NoOp wrote:
<snip>
>>  13. ae-2.ebr2.London2.Level3.net  0.0%    20  169.0 162.0 157.4 170.0   3.6
>>  14. ae-26-52.car2.London2.Level3  5.0%    20  334.6 180.7 157.3 334.6  55.1
>>  15. 195.50.121.2                  0.0%    20  153.7 153.5 152.5 154.2   0.4
>>  16. gw0-0-gr.canonical.com        5.0%    20  158.0 158.9 158.0 159.8   0.5
>>  17. feijoa.canonical.com          5.0%    20  157.6 156.9 156.0 157.6   0.5
>> 
>> Works from here; perhaps it is just a temporary glitch?
> 
> Please have a look at your result NoOp. You *do* have problems at number 
> 14, 16 and 17. I almost never have any package loss. I only have package 
> loss when some part of the network is down or overloaded.

Packet loss is quite common and to be expected. That said, anything over
5% generally indicates a problem. But, if you try again the results will
be different depending upon network load etc:

$ mtr -r -c 20 feijoa.canonical.com
HOST: <snip>                       Loss%   Snt   Last   Avg  Best  Wrst
StDev
<snip>
  7. ae-94-94.ebr4.SanJose1.Level  0.0%    20   16.2  18.5  13.2  26.8   4.8
  8. ae-2.ebr4.NewYork1.Level3.ne  0.0%    20   94.7  88.1  83.4  94.7   4.0
  9. ae-94-94.csw4.NewYork1.Level  0.0%    20   88.4  86.8  81.7  94.4   4.3
 10. ae-91-91.ebr1.NewYork1.Level  0.0%    20   84.3  88.1  83.3  96.6   4.4
 11. ae-42.ebr2.London1.Level3.ne  0.0%    20  158.6 157.3 151.9 164.9   4.4
 12. ae-1-100.ebr1.London1.Level3  0.0%    20  153.1 158.1 152.5 166.2   4.7
 13. ae-2.ebr2.London2.Level3.net  0.0%    20  157.9 162.4 157.5 171.5   4.7
 14. ae-26-52.car2.London2.Level3  0.0%    20  157.0 157.6 156.9 158.8   0.4
 15. 195.50.121.2                  0.0%    20  153.4 153.3 152.5 154.4   0.5
 16. gw0-0-gr.canonical.com        5.0%    20  158.4 158.6 157.9 159.4   0.4
 17. feijoa.canonical.com          5.0%    20  156.3 156.9 156.3 157.6   0.4

Note that 14 is now at 0 packet loss on this run.

> 
> Here is my clean result:
> 
> seserver at cjfhs12:~$ mtr -r -c 20 feijoa.canonical.com
> HOST: cjfhs12                     Loss%   Snt   Last   Avg  Best  Wrst
>    1. 217.197.58.33                 0.0%    20   14.8  15.1  14.1  16.0
>    2. 217.197.56.1                  0.0%    20   16.1  16.0  15.2  17.1
>    3. 212.214.224.109               0.0%    20   19.6  26.7  18.6 155.2
>    4. te-X-Y.car2.copenhagen1.leve  0.0%    20   24.7  55.8  23.9 180.7
>    5. ge-0-0-0.mp2.Copenhagen1.Lev  0.0%    20   24.4  28.2  24.4  60.2
>    6. ae-1-0.bbr1.London2.Level3.n  0.0%    20   60.6  66.9  60.1 116.1
>    7. ae-16-51.car2.London2.Level3  0.0%    20   61.9  61.9  60.4  64.8
>    8. 195.50.121.2                  0.0%    20   62.6  61.8  59.8  62.8
>    9. gw0-0-gr.canonical.com        0.0%    20   61.8  61.6  59.8  62.7
>   10. feijoa.canonical.com          0.0%    20   61.5  61.5  60.1  63.7
> seserver at cjfhs12:~$