MPLS-TP Control Plane Framework draft-abfb-mpls-tp-control-plane-framework-02.txt

1. MPLS-TP Control Plane Frameworkdraft-abfb-mpls-tp-control-plane-framework-02.txt Contributors: Loa Andersson <loa@pi.nu> Lou Berger <lberger@labn.net> Luyuan Fang <lufang@cisco.com> Nabil Bitar <nabil.n.bitar@verizon.com>: Attila Takacs <attila.takacs@ericsson.com> Martin Vigoureux <martin.vigoureux@alcatel-lucent.fr> Elisa Bellagamba <elisa.bellagamba@ericsson.com> MPLS-TP - 77th IETF

2. Draft Objectives • Provide a context for the MPLS-TP control plane • Based on MPLS-TP RFCs and drafts • Notably requirements, framework and survivability • Based on existing IETF control plane – LSPs and PWs • Apply GMPLS/MPLS, PW control planes wherever possible • Reviews control plane requirements • Derived from other requirements, but stated in the context of control plane • All requirements must be satisfied • By the LSP control plane alone for Network Layer Adaptation (FW Section 3.4.3) • By the combination of PW and LSP control planes for Pseudowire Adaptation (FW Section 3.4.2) • Provides a mapping of requirements to existing IETF mechanisms • Identifies gaps • Does define any protocol extensions • Extensions to be covered in other drafts as needed • Reminder: TP does not require a control plane • Drives which functions are in OAM and which are in Control Plane • There is some debate as to which functions belong in each (not covered in this talk) MPLS-TP - 77th IETF

3. Changes in Latest Draft Rev • General edits • Added references for all listed requirements • Aligned text with source, as required • Some requirements removed • Filled in Section 3 – Relationship of PWs and TE LSPs • Rewrote Section 4 – TE LSPs • Reviews existing GMPLS functions as related to TP • Provides mapping of TP CP Requirements to existing mechanisms • Identifies areas of anticipated extensions • Minor updates to PW and Security sections MPLS-TP - 77th IETF

4. Planned Changes • Issue current draft as -00 WG draft • Poll completed March 16 • draft-ietf-ccamp-mpls-tp-control-plane-framework • Immediately submit -01 draft • Additional author: <Eric.Gray@Ericsson.com> • General edits and consistency fixes • Minor requirements alignments • Substantial revision to Section 5 – Pseudowires • Generally aligned with LSP section: • LDP Function and Pseudowires • PW Control (LDP) and MPLS-TP Requirements Table • Anticipated MPLS-TP Related Extensions • Pseudowire OAM and Recovery (Redundancy) • Final planned major technical change MPLS-TP - 77th IETF

5. Next Steps • Immediately • Issue as -00 WG document • Issue -01 document with discussed changes • Issue -02 revision in Mid April • To address WG comments • Other general edits • Update requirements section to align with P2MP split in framework documents  Please review and comment!!! MPLS-TP - 77th IETF

6. Details of Major Changes As time permits MPLS-TP - 77th IETF

7. draft-abfb…-02 Section 3 • Section 3 Added – Relationship of PWs and TE LSPs • Follows framework and PWE3 reference models • PW control is independent from LSP signaling • GMPLS-RSVP for LSPs, LDP for PWs • RSVP support for PWs is out of scope • Allows for use of PW control plane without LSP control plane and visa-versa • Results in four cases (no CP, PW CP, LSP CP, PW+LSP CP) • In combination, all requirements must be met by TP control plane • By the LSP control plane alone for Network Layer Adaptation (FW Section 3.4.3) • By the combination of PW and LSP control planes for Pseudowire Adaptation (FW Section 3.4.2) MPLS-TP - 77th IETF

8. draft-abfb…-02 Section 4 • Section 4 Rewritten – TE LSPs • Reviews existing GMPLS functions as related to TP • In-Band and Out-Of-Band Control and Management • Addressing • Routing • TE LSPs and Constraint-Based Path Computation • Signaling • Unnumbered Links • Link Bundling • Hierarchical LSPs • LSP Recovery • Control Plane Reference Points (E-NNI, I-NNI, UNI) • OAM, MEP (Hierarchy) Configuration and Control • Management Plane Support • Provides mapping of TP CP Requirements to existing mechanisms • GMPLS Architecture, Signaling (GMPLS-RSVP-TE), Routing (ISIS and OSPF), Recovery, Hierarchy, … MPLS-TP - 77th IETF

9. draft-abfb…-02 Section 4 (cont.) • Identifies areas of anticipated extensions • MPLS to MPLS-TP Interworking • Associated Bidirectional LSPs • Asymmetric Bandwidth LSPs • Recovery for P2MP LSPs • Test Traffic Control and other OAM functions • CP or OAM? • Diffserv Object usage in GMPLS MPLS-TP - 77th IETF

10. draft-ietf…-02 Section 5 • Section 5 – Pseudowires • Aligned the structure of this section more closely with the structure of section 4 • Now contains the following subsections: • LDP Function and Pseudowires • PW Control (LDP) and MPLS-TP Requirements Table • Anticipated MPLS-TP Related Extensions • Pseudowire OAM and Recovery (Redundancy) • There is now a requirements table • similar to that in section 4 • intended to show what drafts/RFCs address (or will address) Pseudowire related requirements among those listed in section 2 • References PW-LDP, VCCV, GACH, PWE3, Dynamic-PWs … • Non PW requirements met by LSP control plane • Related changes: • Section 2: updated a few requirements to match changes in the documents from which they derived • Section 4: updated a few table entries to refer to the new table in section 5 • References: added several new references MPLS-TP - 77th IETF

11. draft-ietf…-02 Other Changes • A review of the requirements in section 2, and comparison with requirements sources allowed for deprecating/removing a few requirements • Removed the Network Management Considerations section • The section had no content • Not clear that this is needed for a framework draft • If anyone would care to propose text for the section, it could be re-inserted • A number of general editing changes MPLS-TP - 77th IETF