Re: [mpls] discussion on a common top for yang models related to MPLS
"Rajiv Asati (rajiva)" <rajiva@cisco.com> Tue, 09 February 2016 15:43 UTC
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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: [mpls] discussion on a common top for yang models related to MPLS
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Date: Tue, 09 Feb 2016 15:43:08 +0000
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Subject: Re: [mpls] discussion on a common top for yang models related to MPLS
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My preference wasn’t quite clear in the previous email, so let me state it explicitly - (1), IMO, MPLS base should reside off the root, and for (2) it might be worth dividing the subsequent models as either non-routing or routing, given that MPLS control plane e.g. LDP would be routing dependent, whereas static LSP _could_ not be. For (2), a hierarchy something like his works out (where non-routing is nothing but MPLS base) MPLS Base <non-routing> Static LSP <routing> Static LSP Dynamic LSP - LDP, mLDP, RSVP-TE, However, it creates an interesting challenge for aligning the yang models and while keeping the hierarchy simple. Is it worth having a focused team figuring out MPLS base staying off the root, whereas routing-dependent MPLS control plane protocols e.g. LDP staying off routing? -- Cheers, Rajiv Asati Distinguished Engineer, Cisco -----Original Message----- From: Rajiv Asati <rajiva@cisco.com> Date: Friday, February 5, 2016 at 8:58 AM To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org> Subject: Re: [mpls] discussion on a common top for yang models related to MPLS >Loa, > >I definitely agree (co-author hat off, and user hat on). Avoiding duplication and doing better organization would indeed be a good thing to do. > >1) If MPLS base model (and subsequent models - LDP, TE etc.) augments the (IP) routing/routing-protocol, then it might not well apply to GMPLS. Is there an existing thought-process on this topic? > >Either ignore the above and have GMPLS argument mpls base model as is, or get MPLS base on an independent path (off of (IP) routing/routing-protocol) and work out the subsequent models. > > >2) In terms of hierarchy, is the below envisioned? > > MPLS base => Static LSP and dynamic LSP > MPLS static LSP => > MPLS dynamic LSP => > LDP > mLDP (MP) > TE (RSVP-TE P2P) > TE (RSVP-TE P2MP) > >-- >Cheers, >Rajiv > > > > > >-----Original Message----- >From: mpls <mpls-bounces@ietf.org> on behalf of Loa Andersson <loa@pi.nu> >Date: Friday, February 5, 2016 at 7:34 AM >To: "mpls@ietf.org" <mpls@ietf.org> >Subject: [mpls] discussion on a common top for yang models related to MPLS > >>All, >> >>We have had discussion among the MPLS, TEAS and CCAMP working group >>chairs - but as individual contributors, with chair half off. We agree >>that this discussion should be taken to the working group(s). >> >>The YANG models for MPLS and GMPLS are quite rapidly taking shape. MPLS >>and GMPLS technologies have traditionally been very close, but their >>development has been a bit disjoint. For the YANG models we would like >>to minimize duplication of models/work and think the structure should >>have a common the top, with specific technologies augmented below. >> >>The structure in general as well as the YANG model at the common top >>needs to be the generic and aligned across the output of at least >>CCAMP, MPLS and TEAS working groups. There has been good work >>progressing on TE specifics, e.g., see draft-ietf-teas-yang-te, but >>other areas remain. On the LDP side of the house draft-raza-mpls- >>ldp-mldp-yang is rapidly progressing towards working group adoption. >> >>The models defined in draft-saad-mpls-static-yang could serve as the >>start on filling some of the remaining gaps; covering core xMPLS >>definitions and static LSPs. There are a number of ways to make the >>structure intuitive and generic, and serve as a foundation for >>technology specific models. -- This effort can be viewed as the same >>type of work that was done for TE, see draft-ietf-teas-yang-te. >> >>We think it would be a good idea if the authors and the WG considers >>how to structure xMPLS definitions and static LSPs models to best >>foster common use across the different related models being worked on >>across different WGs. >> >>We are sending this mail in hopes of getting this discussion started. >> >>Thank you, >>Lou and Loa >>-- >> >> >>Loa Andersson email: loa@mail01.huawei.com >>Senior MPLS Expert loa@pi.nu >>Huawei Technologies (consultant) phone: +46 739 81 21 64 >> >>_______________________________________________ >>mpls mailing list >>mpls@ietf.org >>https://www.ietf.org/mailman/listinfo/mpls
- [mpls] discussion on a common top for yang models… Loa Andersson
- Re: [mpls] discussion on a common top for yang mo… Rajiv Asati (rajiva)
- Re: [mpls] discussion on a common top for yang mo… Rajiv Asati (rajiva)
- Re: [mpls] discussion on a common top for yang mo… Phil Bedard
- Re: [mpls] discussion on a common top for yang mo… Jeff Tantsura
- Re: [mpls] discussion on a common top for yang mo… Tarek Saad (tsaad)
- Re: [mpls] discussion on a common top for yang mo… Rajiv Asati (rajiva)