Hi Mrinmoy, On Wed, Jul 20, 2022 at 7:07 PM Mrinmoy Das <mrinmoy.i...@gmail.com> wrote:
> Hello Team, > > Below is the section where END-POINTS object usage in PCInitiate message > has been mentioned: > > Specification: https://datatracker.ietf.org/doc/html/rfc8281 > > > > *5.3 <https://datatracker.ietf.org/doc/html/rfc8281#section-5.3>. LSP > Instantiation* > > > > For an instantiation request of an RSVP-signaled LSP, the destination > > address may be needed. The PCC MAY determine it from a provided > > object (e.g., ERO) or a local decision. Alternatively, the > > END-POINTS object MAY be included to explicitly convey the > > destination addresses to be used in the RSVP-TE signaling. The > > source address MUST be either specified or left for the PCC to choose > > by setting it to "0.0.0.0" (if the destination is an IPv4 address) or > > "::" (if the destination is an IPv6 address). > > > > > > > > Crabbe, et al. Standards Track [Page 10] > > ------------------------------ > > > > RFC 8281 <https://datatracker.ietf.org/doc/html/rfc8281> > PCE-Initiated LSPs in Stateful PCE December 2017 > > > > > > The PCE MAY include various attributes as per [RFC5440 > <https://datatracker.ietf.org/doc/html/rfc5440>]. The PCC > > MUST use these values in the LSP instantiation and local values for > > unspecified parameters. > > > > Above highlighted statement mentioned that inclusion of optional object > END-POINTS in PCInitiate message explicitly convey > > the destination addresses to be used in the RSVP-TE signaling. No > reference of the P flag is mentioned. > > > Assuming you mean the P flag in the common object header, the P (& I flag) is ignored in the stateful messages. RFC 8231 states - The P and I flags of the PCEP objects defined in the current document MUST be set to 0 on transmission and SHOULD be ignored on receipt since they are exclusively related to path computation requests. If you are implementing the extension draft-ietf-pce-stateful-pce-optional, which allows for the use of the P & I flag, the PCE could decide to set the flag if it wants the PCC to MUST process the ENDPOINT object. > So, is it really necessary to set the P flag in the END-POINTS object of > PCInitiate Message? Please let me know. > > > Assuming you are not implementing draft-ietf-pce-stateful-pce-optional, then set it to 0 as per RFC 8231. Thanks! Dhruv > Thanks, > > Mrinmoy > _______________________________________________ > Pce mailing list > Pce@ietf.org > https://www.ietf.org/mailman/listinfo/pce >
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