RARE user and assistance email list

[mc36 <>]

hi,

On 5/10/22 01:56, Cristina Klippel Dominicini wrote:
> 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?
so paris0101 and prague0101 are the dpdk nodes, the rest are tofino boxes...

> - 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?
all the nodes are accessible from the same bastion...

> - Regarding the dpdk freerouters, are they already configured and ready to 
> use or we have to setup the virtual interfaces and other installation steps?
they're already up and running...

> - 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?
trex could also be used on any kind of interface, veth pair is not an 
exception...

> - Does freeRtr support any way to balance the load through different tunnels 
> (as in WCMP, weighted cost multiple paths)?
right now it supports ecmp, but wcmp is also feasible...

> - If we want to access other nodes that are not currently in the booking site 
> (e.g., CHI or GVA), how is it possible?
frederic?

> 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.
frederiiiic! :)

> 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 
> Guimar  es; 
> 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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