Re: [Roll] Obtaining ranks at the DAGroot

Pascal,
             Thanks!
Regards,

               Diego

Le mardi 20 février 2018, Pascal Thubert (pthubert) <pthubert@cisco.com> a
écrit :

> Hello Diego
>
> That is
>
> https://tools.ietf.org/html/draft-thubert-roll-asymlink-02
>
> Take care,
>
> Pascal
>
> Le 19 févr. 2018 à 21:35, Prof. Diego Dujovne <diego.dujovne@mail.udp.cl>
> a écrit :
>
> Pascal,
>              I'm interested in that draft. Do you have a pointer to it?
> Thanks,
>
>
>           Diego
>
> Le lundi 19 février 2018, Pascal Thubert (pthubert) <pthubert@cisco.com>
> a écrit :
>
>> Hello Esteban
>>
>> For asymmetric link one can build 2 DODAGs. There is a draft I published
>> several years ago about that...
>>
>>
>> Regards,
>>
>> Pascal
>>
>> > Le 19 févr. 2018 à 19:16, Esteban Municio <
>> esteban.municio@uantwerpen.be> a écrit :
>> >
>> > Hi Pascal, Rahul,
>> >
>> > Yes, that was actually one of my doubts: if a node can send uplink
>> > through one path and receive downlink through a different path using
>> > the same DODAG instance.
>> >
>> > If links are assumed symmetric that means that is not possible.
>> >
>> >
>> > @Rahul, yes, the idea was to monitor the rank in the nodes (e.g. for
>> > visualize it in a graph), and maybe play a bit with it. For only the
>> > DAG, indeed the target-parent option in the DAOs is enough.
>> >
>> > Thanks and kind regards,
>> > Esteban
>> >
>> >
>> >> Hello Esteban
>> >>
>> >> RPL does not transport the Rank to the root. We actually designed to
>> >> save the cost of doing that (and maintaining it afterwards).
>> >>
>> >> RPL assumes that the links are symmetrical enough so routing
>> >> downwards can follow the target’s subdag. That subdag is within the
>> >> root’s DODAG but directed to the target so there is no need of a Rank
>> >> to build it.
>> >>
>> >> Regards,
>> >>
>> >> Pascal
>> >>
>> >>> Le 16 févr. 2018 à 20:28, Esteban Municio <esteban.municio@uantwerp
>> >> en.be>; a écrit :
>> >>>
>> >>> Hi all,
>> >>>
>> >>> I think this has been already discussed, but I don't think I
>> >> totally
>> >>> understand it.
>> >>>
>> >>> Is there any way to obtain the rank of the nodes at the DAGroot?
>> >> (e.g.
>> >>> in order to monitor the network)
>> >>>
>> >>> One possible idea is obtain it through the ETX of the links.
>> >>>
>> >>> Apparently, some metrics can be sent in the in DAG Metric
>> >> Container,
>> >>> but I'm not sure if this option can be included in DIOs and DAOs,
>> >> or
>> >>> only in DIOs. According to errata 5160 of RFC6560 is only in DIOs.
>> >>>
>> >>> Is there any important reason to not send them in the DAOs as well
>> >> (at
>> >>> least in the non-storing mode)?
>> >>>
>> >>> If this is not possible, is there any other way within RPL to
>> >> deliver
>> >>> this information to the DAGroot?
>> >>>
>> >>> Otherwise, I only only possibilities:
>> >>> - Send the rank values from the application layer (which is not
>> >> very
>> >>> convenient since that would require access to the RPL sublayer)
>> >>> - Through sniffer nodes that would get DIO packets in the network.
>> >>> (however this would require distributing additional nodes all over
>> >> the
>> >>> network)
>> >>>
>> >>> Am I missing something? Any idea?
>> >>>
>> >>> Thank you and kind regards,
>> >>> Esteban
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> Esteban Municio
>> >>>
>> >>> IDLab - Dept. Mathematics and Computer Science
>> >>>
>> >>> University of Antwerp - imec
>> >>>
>> >>> Middelheimlaan 1 , 2020 Antwerp, Belgium
>> >>>
>> >>> Office M.G.322
>> >>>
>> >>> _______________________________________________
>> >>> Roll mailing list
>> >>> Roll@ietf.org
>> >>> https://www.ietf.org/mailman/listinfo/roll
>> >
>> > --
>> > Esteban Municio
>> >
>> > IDLab - Dept. Mathematics and Computer Science
>> >
>> > University of Antwerp - imec
>> >
>> > Middelheimlaan 1 , 2020 Antwerp, Belgium
>> >
>> > Office M.G.322
>> >
>> > _______________________________________________
>> > Roll mailing list
>> > Roll@ietf.org
>> > https://www.ietf.org/mailman/listinfo/roll
>> _______________________________________________
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>>
>
>
> --
> DIEGO DUJOVNE
> Profesor Asociado
> Escuela de Informática y Telecomunicaciones
> Facultad de Ingeniería - Universidad Diego Portales - Chile
> www.ingenieria.udp.cl
> (56 2) 676 8125
>
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>
>

-- 
DIEGO DUJOVNE
Profesor Asociado
Escuela de Informática y Telecomunicaciones
Facultad de Ingeniería - Universidad Diego Portales - Chile
www.ingenieria.udp.cl
(56 2) 676 8125