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Re: [Pce] Moving PCE Allocation of Binding Label/SID to the BSID draft

"Stone, Andrew (Nokia - CA/Ottawa)" <andrew.stone@nokia.com> Wed, 20 January 2021 16:48 UTC

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From: "Stone, Andrew (Nokia - CA/Ottawa)" <andrew.stone@nokia.com>
To: Dhruv Dhody <dd@dhruvdhody.com>, "draft-ietf-pce-binding-label-sid@ietf.org" <draft-ietf-pce-binding-label-sid@ietf.org>, "pce@ietf.org" <pce@ietf.org>
CC: pce-chairs <pce-chairs@ietf.org>
Thread-Topic: [Pce] Moving PCE Allocation of Binding Label/SID to the BSID draft
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Date: Wed, 20 Jan 2021 16:48:46 +0000
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Subject: Re: [Pce] Moving PCE Allocation of Binding Label/SID to the BSID draft
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Hi Dhruv,

I agree that pce sending down binding SID should be in the binding SID document, however I have some concerns regarding some of the text that requires PCECC capability exchange in order to allocate the value and erroring otherwise for a PCE-INIT. While the binding SID document is independent of SR Policy, one of its key usage is for SR Policy Candidate path. If a user wants to manually program an SR Policy CP and define a specific BSID and deploy it via PCEP PCE-INIT, I do not think there should be a requirement on PCECC capabilities to do so. While PCEP is not BGP of course, I can manually configure an SR Policy Candidate path with a BSID and inject with BGP without any pre-negotiations. This applies to Replication Segment as well. The BSID needs to be valid in SRLB, not necessarily a valid CCI related value?

Thanks!
Andrew


On 2021-01-20, 8:42 AM, "Pce on behalf of Dhruv Dhody" <pce-bounces@ietf.org on behalf of dd@dhruvdhody.com> wrote:

    Hi WG, Authors,

    As part of the handling of RTGDIR comments [1] for the PCECC I-D [2],
    it was discovered that it is a better idea to handle the Binding SID
    allocation by the PCE in the BSID I-D [3]. Julien and I agree.

    Also, it makes sense to move the new P-flag in the LSP object here
    (from path segment WG I-D [4]).

    Cheng and I have this proposed update -

    Diff: https://tools.ietf.org/tools/rfcdiff/rfcdiff.pyht?url1=draft-ietf-pce-binding-label-sid-05&url2=https://raw.githubusercontent.com/dhruvdhody/ietf/master/draft-ietf-pce-binding-label-sid-06.txt

    Please let us know if anyone has any concerns with this approach. This
    draft is in our WG LC Queue [5].

    Thanks!
    Dhruv/Cheng

    [1] https://mailarchive.ietf.org/arch/msg/rtg-dir/4n6FpBoDHjnGppKH4bcVotUu_hE/
    [2] https://datatracker.ietf.org/doc/draft-ietf-pce-pcep-extension-for-pce-controller/
    [3] https://datatracker.ietf.org/doc/draft-ietf-pce-binding-label-sid/
    [4] https://datatracker.ietf.org/doc/draft-ietf-pce-sr-path-segment/
    [5] https://trac.ietf.org/trac/pce/wiki/WikiStart#WGLastCallQueue

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