level3.net in Chicago - high packet loss?!?

Network Fortius netfortius at gmail.com
Tue Sep 6 14:25:28 UTC 2005


And how exactly would you interpret the number returned by net_loss  
(int), in a column called "LOSS", in reference to reachability of a  
"hop" between two end points:

int net_loss(int at)
{
   if ((host[at].xmit - host[at].transit) == 0)
     return 0;
   /* times extra 1000 */
   return 1000*(100 - (100.0 * host[at].returned / (host[at].xmit -  
host[at].transit)) );
} ?

Thanks,
Stef
Network Fortius, LLC


On Sep 6, 2005, at 7:45 AM, Robert E.Seastrom wrote:

>
> Network Fortius <netfortius at gmail.com> writes:
>
>
>> Anybody having any idea why such a high packet loss on lever3's
>> network, in Chicago?
>>
>
> End-user misinterpreting output from MTR.  This network does not
> appear to have any packet loss end-to-end.
>
>                                         ---Rob
>
>
>
>> Stef:~ scm$ mtr -r www.yahoo.com
>> ...
>> tbr1-p010802.cgcil.ip.att.net             0%    16   16   15.12
>> 24.21   49.26
>> ggr2-p310.cgcil.ip.att.net                0%    16   16   13.18
>> 42.66  118.99
>> so-1-1-0.edge1.chicago1.level3.net        0%    16   16   14.48
>> 35.84  126.48
>> so-2-1-0.bbr1.chicago1.level3.net        63%     6   16   14.44
>> 43.74   79.97
>>                                                                     
>> ^^^^^^^
>> as-1-0.bbr2.sanjose1.level3.net           0%    16   16   61.95
>> 80.64  176.01
>> ge-10-2.ipcolo3.sanjose1.level3.net       0%    16   16   63.37
>> 95.61  148.46
>> unknown.level3.net                        0%    16   16   63.34
>> 86.46  168.62
>> unknown-66-218-82-217.yahoo.com           0%    16   16   62.09
>> 88.91  127.58
>> p4.www.scd.yahoo.com                      0%    16   16   64.51
>> 89.96  183.79
>>
>> TIA,
>> Stef
>> Network Fortius, LLC
>




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