[atlas] Paris-traceroute variations

Hi all,
Just a quick question.
What is the real difference between a TCP paris-traceroutes and an UDP
paris-traceroute ?
How do the probes perform each of them?
Thanks,
Best regards,
Roderick

On 26.06.2014 13:13, Philip Homburg wrote:
> Hi Juan,
>
> On 2014/06/19 16:59 , Juan Antonio Cordero Fuertes wrote:
>> Not sure this is the right place to ask this... sorry if it is not.
>>
>> I'm trying to configure Paris-traceroute measurements, and it is not
>> clear for me what is the meaning of the /paris/ parameter. In
>> https://atlas.ripe.net/docs/udm/ it is said that it corresponds, for
>> values from 1 to 16, to "the number of variations to be used for a Paris
>> traceroute <http://www.paris-traceroute.net/>". What is this? Does it
>> correspond to the number of initial probes to be used by
>> paris-traceroute? I am unable to figure it out from the RIPE Atlas
>> docs... any indication would be appreciated.
>
> Paris-traceroute tries to make sure that all packets of a traceroute
> take the same route through a load balancer. This in contrast to
> traditional traceroute where packets from different hops typically take
> different routes when load balancers are involved.
>
> However, in the case of paris-traceroute it is still interesting to find
> out if there are multiple routes or not. For this reason, the traceroute
> measurement creates different variations that may take a different route.
>
> Each interval, it will try one variation. So if you select 16 variations
> then it will take 16 intervals before you get back to the first one.
>
> Philip
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