RARE user and assistance email list

[Frédéric LOUI <>]

Hi Simon,

Thanks for this precision !

Cheers
Frederic

> Le 10 mai 2022 à 16:09, Simon Leinen <> a écrit :
> 
> Bonjour Frédéric, all,
> 
>>> - If we want to access other nodes that are not currently in the
>>>  booking site (e.g., CHI or GVA), how is it possible?
> 
>> For now as it is unclear how to integrate all of these persistent
>> testbed domain I’d (for now) only consider GÉANT nodes.
> 
>> Don’t get me wrong, It does not mean that you cannot use GVA0001. For
>> example GVA can basically be considered taking part of GP4L except
>> that it belongs officially to SWITCH NREN, I’m talking under SWITCH
>> control, SWITCH is willing to put GVA0001 at disposal of GP4L but as
>> it is not yet written anywhere, I would rather have this policy
>> document beforehand.
> 
> In Alex's and my understanding, GVA0001 does belong to the GÉANT Project
> - it was acquired using project funding.
> 
> Its configuration is slightly different from the others, in that it is
> not deployed within the GÉANT PoP, but within SWITCH racks (both
> colocated at CERN).
> 
> But in our view, it can/should be treated as a normal part of the GÉANT
> P4 Lab wherever possible.
> 
> Cheers,
> -- 
> Simon.
> 
>> But I’m pretty sure for example, that switches in CERN or CALTECH might 
>> have different policy and access to these 2 switches might not be as easy 
>> as it is in GP4L.
> 
>>> I don't know if you still are scheduling the freeRtr dev sessions on 
>>> Tuesdays, but, if possible, it would be a good opportunity to discuss 
>>> this experiment.
> 
>> I cannot attend the regular VC today. (Meeting schedule clash) 
>> But as it is not freeRtr specific, we can tackle this in a side meeting.
> 
>> The bad news is that I’m unavailable this week and next week (business 
>> trip). 
>> Therefore, if it is not too late we can have this VC monday after the 
>> GNA-G DiS meeting monday 17h->18h CEST. (Mainly from people who will 
>> access teh Lab)
>> Or another day during this week.
> 
>> Please let me know your thoughts,
>> Frederic
> 
>>> Le 10 mai 2022 à 01:56, Cristina Klippel Dominicini 
>>> <> a écrit :
>>> 
>>> 
>>> Hi Csaba,
>>> 
>>> Thanks for the files and explanation!
>>> 
>>> We still have some doubts:
>>> - In the config you provided, PAR0101 is a DPDK node and the others are 
>>> all Tofino nodes?
>>> - In the booking site (https://p4-bkd-srv.rare.nmaas.eu), we can only 
>>> reserve the 4 Tofino nodes (FRA,AMS,BUD,POZ), which are accessed via ssh. 
>>> What about the DPDK nodes? How to access them and where are their 
>>> connection points in the topology?
>>> - Regarding the dpdk freerouters, are they already configured and ready 
>>> to use or we have to setup the virtual interfaces and other installation 
>>> steps?
>>> "you can always initiate a ping flood from these, or, the dpdk
>>> freerouters' linux could connect to the testbed if you add a veth
>>> pair, whose side1 is used by the linux to do the iperfing, and side2
>>> is given to freerouter to handle the packets... (the famous eth20001
>>> interface of the default freerouter installation to a vm, for
>>> example)"
>>> - Regarding the traffic generator, we will start with ping and iperf, but 
>>> then we will need something more powerful. We participated in the dev 
>>> sessions when Carmem demonstrated TREX in her setup. Do you think we 
>>> could reproduce that in the P4 lab?
>>> - Does freeRtr support any way to balance the load through different 
>>> tunnels (as in WCMP, weighted cost multiple paths)?
>>> - If we want to access other nodes that are not currently in the booking 
>>> site (e.g., CHI or GVA), how is it possible?
>>> 
>>> I don't know if you still are scheduling the freeRtr dev sessions on 
>>> Tuesdays, but, if possible, it would be a good opportunity to discuss 
>>> this experiment.
>>> 
>>> Best regards,
>>> Cristina
>>> 
>>> ________________________________________
>>> De: mc36 <>
>>> Enviado: segunda-feira, 9 de maio de 2022 13:55
>>> Para: Cristina Klippel Dominicini; Frederic LOUI
>>> Cc: Marcos Schwarz; Everson Scherrer Borges; Magnos Martinello; Rafael 
>>> Silva Guimarães; 
>>> Assunto: Re: Experiments PolKA vs. Segment Routing
>>> 
>>> hi,
>>> i go inline....
>>> br,
>>> cs
>>> 
>>> On 5/9/22 18:38, Cristina Klippel Dominicini wrote:
>>>> 
>>>> The main idea is to compare PolKA with Segment Routing in RARE, since 
>>>> both are source routing approaches supported by freeRtr. Thus, the first 
>>>> (and fundamental) question is: if you
>>>> can collaborate with us to produce this experiment, and if you see this 
>>>> as a nice showcase of RARE/freeRtr. Everson, Marcos, me and the rest of 
>>>> the team will be responsible for
>>>> producing the experiment, but we will for sure need your guidance and 
>>>> knowledge to properly explore RARE/freeRtr.
>>>> 
>>> yess!
>>> 
>>> 
>>>> 
>>>> As an initial step towards the big plan, we want to reproduce the 
>>>> emulated PolKA experiment AS IS in the P4 Lab, and we already have some 
>>>> initial questions:
>>>> 1) Is there any initial documentation on how to setup a basic experiment 
>>>> in the RARE P4 Lab with freeRtr (access, instalation, ...)?
>>> right now, the testbed is running rare in a mixed tofino & dpdk node 
>>> environment...
>>> attaching you the current configs plus the script to bring it up locally 
>>> on your
>>> pc in a similar way as everson does with his topology... as you can see 
>>> in the
>>> configs, both polka and sr are both up and running, the only thing yo 
>>> need to
>>> do is to add the tunnels and compare the results...
>>> 
>>>> 2) At the moment, the node configurations (port numbers, addresses) of 
>>>> the emulated experiment is not resembling the real testbed. Is there any 
>>>> documentation with this configuration?
>>> as you can see in the script, the configs are archived at nmaas, 
>>> accessible by eduid...
>>> (in case you dont have access to it, also attaching the current config 
>>> archive...)
>>> 
>>>> 3) In the emulated experiment, we have four core nodes (Frankfurt, 
>>>> Amsterdam, Poznan and Budapest) running PolKA core and two edges that 
>>>> setup the tunnels. For an experiment in the
>>>> physical setup, do you have any advice on how to design the edge nodes? 
>>>> In the first version of the experiment, should we use P4 nodes only for 
>>>> the core and DTNs as edges with
>>>> freeRtr? How do you normally setup edges in your experiments? It is not 
>>>> clear for us at the moment how exactly to deploy edge freeRtr nodes in 
>>>> the P4 Lab.
>>> so the lab have 4 tofino switches, and 2 dtn nodes running freerouters...
>>> you can always initiate a ping flood from these, or, the dpdk freerouters'
>>> linux could connect to the testbed if you add a veth pair, whose side1 is
>>> used by the linux to do the iperfing, and side2 is given to freerouter to
>>> handle the packets... (the famous eth20001 interface of the default
>>> freerouter installation to a vm, for example)
>>> 
>>>> 4) How do you currently generate traffic in the P4 Lab?
>>>> 
>>> ping flood from the dtns usually enough for me.... :)
>>> 
>>>> If possible, it would be very nice if we could schedule some hands-on 
>>>> sessions (as in the freeRtr dev meetings) to discuss and test this 
>>>> experiment with you.
>>> good idea... then it could be the topic for today...
>>> 
>>> ________________________________
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>