[caiu] Perda de pacotes dns google via PTT

[J. Tozo]

Ascenco,

 Conforme reportado a perda acontece apenas para os endereços 8.8.8.8 e
8.8.4.4 respectivamente DNS primario e secundario porem o mesmo nao ocorre
para o servidor de DNS terciario 4.2.2.2.

 Para as outros endereços realmente nao ocorre perda.




2014-05-09 19:39 GMT-03:00 Eduardo Ascenco Reis <eascenco em nic.br>:

> Prezados Colegas,
>
> A perda de pacotes observada para testes de ping (ICMP) não ocorre para
> IPv6 e nem para o tráfego de aplicações (e.g tcp/80).
>
> Segue alguns testes:
>
> ##################################################################
>
> ptt.br (200.160.1.10) :~$ date; mtr -n -r -c 10 www.google.com
> Sex Mai  9 19:33:41 BRT 2014
> HOST: fly                         Loss%   Snt   Last   Avg  Best  Wrst
> StDev
>   1.|-- 2001:12ff:0:1::1           0.0%    10    0.3   0.3   0.3   0.4
> 0.0
>   2.|-- 2001:12ff:2:1::252         0.0%    10    0.4   2.8   0.3  23.8
> 7.4
>   3.|-- 2001:12ff:1::173           0.0%    10    6.3   2.5   0.4  15.6
> 4.9
>   4.|-- 2001:12f8::218:58          0.0%    10    1.0   1.1   1.0   1.8
> 0.3
>   5.|-- 2001:4860::1:0:4f24        0.0%    10   10.5  14.3   1.6  20.7
> 5.5
>   6.|-- 2001:4860::1:0:468c        0.0%    10   10.9  11.5  10.8  17.3
> 2.0
>   7.|-- 2001:4860:0:1::74d         0.0%    10   11.0  11.0  10.9  11.0
> 0.0
>   8.|-- 2800:3f0:4004:801::1014    0.0%    10   10.8  10.8  10.8  10.8
> 0.0
> ptt.br (200.160.1.10) :~$
>
> ##################################################################
>
> ptt.br (200.160.1.10) :~$ date; mtr -4 -n -r -c 10 www.google.com
> Sex Mai  9 19:33:58 BRT 2014
> HOST: fly                         Loss%   Snt   Last   Avg  Best  Wrst
> StDev
>   1.|-- 200.160.1.14               0.0%    10    0.3   1.8   0.3  14.6
> 4.5
>   2.|-- 200.160.0.252              0.0%    10    0.3   3.3   0.3  29.8
> 9.3
>   3.|-- 200.160.0.173              0.0%    10    0.4   0.4   0.4   0.4
> 0.0
>   4.|-- 187.16.218.58             30.0%    10    1.0   1.1   1.0   1.1
> 0.0
>   5.|-- 209.85.254.54             30.0%    10    1.2   5.9   1.1  34.6
>  12.6
>   6.|-- 72.14.235.143             20.0%    10   10.6  10.7  10.5  11.4
> 0.3
>   7.|-- 209.85.253.171            20.0%    10   10.9  10.8  10.8  10.9
> 0.0
>   8.|-- 173.194.42.178            10.0%    10    8.6   8.6   8.6   8.6
> 0.0
> ptt.br (200.160.1.10) :~$
>
>
> ##################################################################
>
> ptt.br (200.160.1.10) :~$ date; tcptraceroute www.google.com
> Sex Mai  9 19:36:36 BRT 2014
> Selected device eth0, address 200.160.1.10, port 48165 for outgoing packets
> Tracing the path to www.google.com (173.194.42.177) on TCP port 80
> (http), 30 hops max
>  1  ae1-22.ar3.nu.ptt.br (200.160.1.14)  0.342 ms  0.284 ms  0.276 ms
>  2  ae0-0.core2.nu.registro.br (200.160.0.252)  0.362 ms  0.291 ms 0.300
> ms
>  3  xe-0-0-1-0.gw2.nu.registro.br (200.160.0.173)  0.349 ms  0.329 ms
> 0.322 ms
>  4  as15169-s2.sp.ptt.br (187.16.218.58)  1.037 ms  0.991 ms  0.982 ms
>  5  209.85.254.136  1.416 ms  1.423 ms  1.412 ms
>  6  209.85.245.53  10.891 ms  10.949 ms  10.889 ms
>  7  * * *
>  8  rio01s06-in-f17.1e100.net (173.194.42.177) [open]  13.025 ms 13.024
> ms  13.030 ms
> ptt.br (200.160.1.10) :~$
>
> ##################################################################
>
>
> Atenciosamente,
>
> --
>
> Eduardo Ascenço Reis
>
>
> PTT.br - http://ptt.br/
> NIC.br - http://nic.br/
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-- 
Grato,

 Tozo