[LAC-TF] measuring ipv4 x ipv6 latencies

[Arturo Servin]

	I presume that some of the problems that we will see for IPv6 compared with v4 it would be some paths with tunnels but I bet more for a difference in peering relationships. For example networks with low delay in v4 because a local peering and high delay in v6 for the lack of it. Fortunately the raw data is there, so anybody could start doing the analysis even without deploying probes.

	Also, commenting about Alejandro's reply, I think that the main problem that he sees is 6to4 and Teredo (see Geoff analysis:  ). That should not happen with the probes that are being deployed for this project (but it might be good to take a look at the worst cases).


Regards,
.as

On 20 Apr 2011, at 12:55, Antonio M. Moreiras wrote:

> Hi Alejandro.
> 
> I will try to follow your advice. In our case, the measurement points
> are inside big networks (ISPs, universities, etc), so I think there will
> be no cases of using Teredo or 6to4. But some of them can be running BGP
> over tunnels with HE. I will try to consider it in the analysis.

> 
> When I have some preliminary analysis done, I will let you know. If not,
> we can compare the data and analysis in LACNIC meeting.
> 
> Wouldn't it be possible also collect some data for us from BT network?
> 
> -- 
> Antonio M. Moreiras
> Supervisor de Projetos
> Núcleo de Informação e Coordenação do Ponto BR - NIC.br
> moreiras at nic.br
> (11) 5509-3553 - (11) 9466-2277
> inoc-dba: 22548*amm
> http://nic.br - http://ceptro.br
> 
> 
> Em 20-04-2011 01:35, Alejandro Acosta escreveu:
>> Hi Antonio,
>>  Nice to hear about your study.
>>  I wanted to tell you that I've running a similar research and I've
>> found the same behavior, IPv6 latencies are around 35% worst than
>> IPv4.
>>  I got an advice for you, please if possible try to split the results
>> between IPv6 native connections and IPv6 using transition methods
>> (like 6to4 & Teredo), I also do have the data but I haven't done the
>> maths! (sorry). I will be showing my results on Lacnic XV.
>> 
>> Thanks in advance.
>> 
>> Alejandro,
>> 
>> 2011/4/19 Antonio M. Moreiras <moreiras at nic.br>:
>>> Hello.
>>> 
>>> We are taking some measurements of IPv4 and IPv6 latencies in the
>>> Internet, against some Web sites and NTP sites.
>>> 
>>> With this, we are trying to understand the current situation. In some
>>> isolated tests, it seems that the IPv6 latencies could be 30% to 60%
>>> worst than the IPv4 latencies, from some brazilian networks, including
>>> ours. However, we are not sure about it.
>>> 
>>> This test will integrate with (LACNIC's) SIMON in some near point in the
>>> future. And probably we will discuss some results at IXPs meeting in the
>>> next LACNIC.
>>> 
>>> We are taking these measurements from our network, at NIC.br, and from
>>> some other brazilian sites, but we would like to have other partners in
>>> this test, from worldwide, and specially from LAC region, what would
>>> facilitate the comparisons.
>>> 
>>> You could see some preliminary data in this website:
>>> 
>>> http://labs.ceptro.br/simonv6 (work in progress).
>>> 
>>> Maybe you could host a measurement point for this?
>>> 
>>> The measurements are taken by a java software, that runs also an
>>> external traceroute. It runs preferencially in a linux/ubuntu 10.10 or
>>> 10.04.
>>> 
>>> Some of the participants are installing the software themselves. Others
>>> are providing us with virtual machines. Both models are welcome.
>>> 
>>> Organizations that agree to take part in this test, should also agree in
>>> allowing us to share the results publically. The data to be publically
>>> released is:
>>> - orig ipv4, dest ipv4, delay ipv4, traceroute ipv4 (IP list)
>>> - orig ipv6, dest ipv6, delay ipv6, traceroute ipv6 (IP list)
>>> 
>>> Other information, as the AS number, location, upstreams, etc, can be
>>> infered from these data.
>>> 
>>> If you can help us with this, please let me know in pvt and I will send
>>> further information.
>>> 
>>> Regards!
>>> --
>>> Antonio M. Moreiras
>>> IPv6.br project coordinator
>>> Brazilian Network Information Center - NIC.br
>>> moreiras at nic.br
>>> +55 11 5509-3553 -  +55 11 9466-2277
>>> inoc-dba: 22548*amm
>>> http://nic.br - http://ceptro.br
>>> 
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