Hi authors of draft-ietf-pce-sr-bidir-path, I have two comments regarding the draft, mostly for Section 4.1, though they may affect other sections as well:
1. Do we really need to create 2 LSPs (forward and reverse) on both - headend and tailend (so 4 LSPs just to setup single bidirectional policy with single candidate-path)? What is the purpose of encoding of reverse segment-list as separate LSP? I assume that we just need reverse segment-list for PM/BFD (the draft is already even saying that “This reverse direction LSP MUST NOT be instantiated on the PCC”) and not entire PCEP LSP. In this context, an additional segment-list/ERO should suffice and would be more efficient from an encoding perspective and most likely from resources POV in PCE LSP database, similar to the approach in draft-ietf-pce-multipath, which seems to be more efficient even for candidate-path with single SL. 2. Tunnel is identified by PLSP-ID, LSP by fields from LSP-IDENTIFIERS TLV as explained in: https://www.ietf.org/archive/id/draft-ietf-pce-operational-01.html#name-structure But Figure 1b is describing 2 tunnels and at the same time describing 4 PLSP-IDs (“(100,200,300,400)=PLSP-IDs”). Note that this needs to be fixed on multiple places in the document, including complete section 4.5 Thanks a lot, Samuel From: Dhruv Dhody <[email protected]> Date: Sunday, 9 November 2025 at 07:53 To: [email protected] <[email protected]> Cc: [email protected] <[email protected]> Subject: [Pce] WGLC for draft-ietf-pce-sr-bidir-path-16 Hi WG, This email marks the start of the working group last call for draft-ietf-pce-sr-bidir-path - https://datatracker.ietf.org/doc/draft-ietf-pce-sr-bidir-path/ Please indicate your support or concern for this draft. If you are opposed to the progression of the draft to RFC, please articulate your concern. If you support it, please indicate that you have read the latest version and it is ready for publication in your opinion. As always, review comments and nits are most welcome. The WG LC will end on Monday 24th Nov 2025. A general reminder to the WG to be more vocal during the last-call/adoption. Thanks, Dhruv & Julien
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