Hi All, Sorry for delay in replying, let me try to send you proposed text tomorrow as per Julien's suggestion!
Regards, Dhruv > -----Original Message----- > From: Julien Meuric [mailto:[email protected]] > Sent: 31 October 2015 00:35 > To: Joel Halpern Direct; Dhruv Dhody > Cc: A. Jean Mahoney; General Area Review Team; draft-ietf-pce-pcep- > [email protected]; Dhruv Dhody > Subject: Re: Gen-art] Review: draft-ietf-pce-pcep-domain-sequence > > Hi Joel, hi Dhruv, > > Focusing on the Area ID issue, I'd support adding some text along with > Dhruv's proposal, but stricter (not just deferring to "implementation's > feeling"). I.e., Area IDs are AS-specific and mustn't cross AS borders; > AS-local Area IDs may be used inside an AS (without restricting to the > origin AS). > > See you in Yokohama, > > Julien > > > Oct. 30, 2015 - [email protected]: > >> Given that Exclude Route Objects are not interleaved with > >> include Objects, is there a restriction that Area IDs may only > be > >> excluded from paths within a single AS? > >> > >> > >> [Dhruv]: I guess this would depend on the PCE behavior during > >> inter-AS path computation i.e. PCEmay feel the area id subobjectis > >> irreleventand strips from the XRO before sending the request to > >> another PCE or it might keep it intact. > >> > >> > >> This would be in s > >> pi > >> ritof RFC 4874 where > >> - > >> > >> > >> > >> The number of subobjects to be avoided, specified in the > >> signaled XRO, may be constant throughout the whole path setup, > or the > >> subobjects to be avoided may be removed from the XRO as they > become > >> irrelevant in the subsequent hops of the path setup. > >> > >> We can always > >> use > >> EXRS in IRO specify the intentions much more clearly. > >> > >> If you agree, we can work on some text to add. > > > > I still can not see how the Excluded Route Object with an Area ID > will > > work. How will a PCE which receives such a request know what AS it > > applies to? It works fine if the whole path is within one AS. But > if > > this is a multi-AS request, the AS elements, if present at all, are > in > > the IRO. > > The most obvious approach would be to declare that the PCE shall > > assume that all Area ID exclusions apply to the origin AS. _______________________________________________ Gen-art mailing list [email protected] https://www.ietf.org/mailman/listinfo/gen-art
