Re: [Roll] NSA PS-set metric/constraint
Remous-Aris Koutsiamanis <aris@ariskou.com> Fri, 06 March 2020 17:39 UTC
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From: Remous-Aris Koutsiamanis <aris@ariskou.com>
Date: Fri, 06 Mar 2020 18:38:56 +0100
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To: dominique barthel <dominique.barthel@orange.com>
Cc: "Georgios Z. Papadopoulos" <georgios.papadopoulos@imt-atlantique.fr>, roll <roll@ietf.org>
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Subject: Re: [Roll] NSA PS-set metric/constraint
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Fantastic, Thanks, I'll update the draft then. Best, Aris On Fri, Mar 6, 2020 at 5:37 PM <dominique.barthel@orange.com> wrote: > Hello Aris, > > Thanks for pinging me, this had disappeared under the pile. > > > If I understand this correctly, a node reporting it's own parent set in > the NSA will set P=1 basically to let the receiving nodes know that they > should not expect to find inside all the metric along the whole path, but > only a part of it, and in our case from just the sending node. > > Am I getting this right? > > Exactly, this is what I had in mind. The recording along the path is > partial (P), and it turns out to be exactly the one from the potential > parent, which is all we need. > So it's all totally inline with RFC6551: we don't need to create an > exception to RFC6551. > Best regards > > Dominique > > De : Remous-Aris Koutsiamanis <aris@ariskou.com> > Date : Friday 6 March 2020 16:58 > À : Dominique Barthel <dominique.barthel@orange.com> > Cc : "Georgios Z. Papadopoulos" <georgios.papadopoulos@imt-atlantique.fr>, > "roll@ietf.org" <roll@ietf.org> > Objet : Re: [Roll] NSA PS-set metric/constraint > > Hello Dominique, > > sorry to bother you in a probably very busy period. > To finalise our draft before the cutoff, we're waiting for a brief answer > from you on this previous question: > > On Sat, Feb 29, 2020 at 12:51 AM Remous-Aris Koutsiamanis < > aris@ariskou.com> wrote: > >> >> [DP] Alternate proposal: >>> Could the PS be part of an NSA Metric? After all, it is used to help >>> select which parent(s) are best suited for upward routing, not to prune >>> downlink propagation of the DIO along a path that exceed some metric >>> value. C=0, R=1, P=1 comes to mind for this metric. >>> >> >> [ARIS] >> > So I read a bit more about this. So C=0 means "use as a routing metric", >> OK. >> R=1 means "use as a recorded metric", i.e. not aggregated, because >> aggregated makes no sense, OK. >> Now, P=1 means that one or more of the nodes on the path did not record >> the metric. So, it's less a "command" and more a report of previous >> behaviour. >> >> My question is: it seems impossible that *all* the parent sets can be >> recorded along the path due to size, so each node *replaces* the received >> parent set with it's own. >> >> We can specify this with text of course, but I have not seen another >> existing metric that behaves like this. >> On the other hand, the NSA metric object is not used a lot, and if it >> makes sense for any metric to be replaced rather then appended to a list of >> metrics, that metric would be NSA. >> >> I am not sure about that P=1 part though and how it relates to replacing >> the existing metrics. >> If I understand this correctly, a node reporting it's own parent set in >> the NSA will set P=1 basically to let the receiving nodes know that they >> should not expect to find inside all the metric along the whole path, but >> only a part of it, and in our case from just the sending node. >> >> Am I getting this right? >> > > Best, > Aris > > _________________________________________________________________________________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. > > This message and its attachments may contain confidential or privileged information that may be protected by law; > they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and delete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. > Thank you. > >
- [Roll] NSA PS-set metric/constraint Rahul Jadhav
- Re: [Roll] NSA PS-set metric/constraint Georgios Z. Papadopoulos
- Re: [Roll] NSA PS-set metric/constraint dominique.barthel
- Re: [Roll] NSA PS-set metric/constraint Remous-Aris Koutsiamanis
- Re: [Roll] NSA PS-set metric/constraint Remous-Aris Koutsiamanis
- Re: [Roll] NSA PS-set metric/constraint dominique.barthel
- Re: [Roll] NSA PS-set metric/constraint Remous-Aris Koutsiamanis