Re: [alto] PCE
Dhruv Dhody <dhruv.ietf@gmail.com> Tue, 28 November 2023 07:46 UTC
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From: Dhruv Dhody <dhruv.ietf@gmail.com>
Date: Tue, 28 Nov 2023 13:15:43 +0530
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To: LUIS MIGUEL CONTRERAS MURILLO <luismiguel.contrerasmurillo@telefonica.com>
Cc: Martin Duke <martin.h.duke@gmail.com>, IETF ALTO <alto@ietf.org>
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Subject: Re: [alto] PCE
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Hi Martin, I agree with Luis. RFC 7971 list PCE as a potential data source for ALTO server - https://datatracker.ietf.org/doc/html/rfc7971#autoid-19 Further RFC 7491 attempts to capture some of the possible PCE and ALTO interactions where PCE and ALTO complement each other. Thanks! Dhruv On Tue, Nov 28, 2023 at 2:00 AM LUIS MIGUEL CONTRERAS MURILLO < luismiguel.contrerasmurillo@telefonica.com> wrote: > Hi Martin > > > > Thanks for commenting. > > > > PCE and ALTO work on different aspects. PCE allows to calculate and/or > select the best path among network border elements according to some > constraints (e.g., latency). Besides that, the PCE can trigger the > establishment of such path leveraging on tunneling capabilities, e.g. using > Segment Routing with Traffic Engineering. > > > > On the other hand, as you know well, with ALTO it is possible to expose > network and cost maps for PIDs attached to network border elements. > > > > So, while PCE intention is to build constrained paths, ALTO aim is to > expose them. Certainly, ALTO could leverage on PCE information for creating > the network and cost maps (case not yet elaborated in the form of an RFC or > draft, that is, definition of an SBI for retrieving PCE information > extracting info from PCE-related databases), but also other forms of > interworking could be considered (e.g., ALTO triggering PCE computation of > paths). These potential interworking actions could be a matter of a charter > item for SBI developments in ALTO WG (or a sequel of it). > > > > Best regards > > > > Luis > > > > *De:* alto <alto-bounces@ietf.org> *En nombre de * Martin Duke > *Enviado el:* lunes, 27 de noviembre de 2023 20:00 > *Para:* IETF ALTO <alto@ietf.org> > *Asunto:* [alto] PCE > > > > Hi ALTO, > > > > In my email announcing the impending closure of ALTO, I mentioned a number > of potential outlets for future work. I neglected to mention PCE > <https://datatracker.ietf.org/wg/pce/about/>, which to me seems to > covering a similar problem area. If they haven't already, I would encourage > ALTO practitioners to investigate PCE's activities and see where ALTO > solves their problems, or PCE work solves current ALTO problems. > > > > Similarly, people working on PCE probably have issues with assembling a > topology database, and would probably be fruitful partners for those > working on assembling the ALTO database. > > > > Thanks, > > Martin > > ------------------------------ > > Este mensaje y sus adjuntos se dirigen exclusivamente a su destinatario, > puede contener información privilegiada o confidencial y es para uso > exclusivo de la persona o entidad de destino. Si no es usted. el > destinatario indicado, queda notificado de que la lectura, utilización, > divulgación y/o copia sin autorización puede estar prohibida en virtud de > la legislación vigente. 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- [alto] PCE Martin Duke
- Re: [alto] PCE LUIS MIGUEL CONTRERAS MURILLO
- Re: [alto] PCE Dhruv Dhody