MPLS/GMPLS Migration and Interworking - PowerPoint PPT Presentation

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MPLS/GMPLS Migration and Interworking

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MPLS/GMPLS Migration and Interworking CCAMP, IETF 64 Kohei Shiomoto, shiomoto.kohei_at_lab.ntt.co.jp Discussion hints Background reading draft-shiomoto-ccamp-mpls-gmpls ... – PowerPoint PPT presentation

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Title: MPLS/GMPLS Migration and Interworking


1
MPLS/GMPLS Migration and Interworking
  • CCAMP, IETF 64
  • Kohei Shiomoto, shiomoto.kohei_at_lab.ntt.co.jp

2
Discussion hints
  • Background reading
  • draft-shiomoto-ccamp-mpls-gmpls-interwork-fmwk-00.
    txt
  • draft-oki-ccamp-gmpls-ip-interworking-06.txt
  • draft-kumaki-ccamp-mpls-gmpls-interworking-01.txt
  • Discussion points
  • what are we trying to achieve?
  • what are the models available?
  • do we want to support all of these models?

3
Migration Interwork
  • What is migration?
  • MPLS to GMPLS migration is the process of
    evolving MPLS-TE-based control plane to
    GMPLS-based control plane.
  • What is interworking?
  • Interworking is just a facilitating function for
    migration, not a final objective of migration.
    (Migration and interworking are separate goals.)
  • Interworking is an important technical driver for
    a migration model. (will be discussed later)

4
Migration models
draft-shiomoto-ccamp-mpls-gmpls-interwork-fmwk-00.
txt
  • Island model
  • Replace or upgrade MPLS island(s) to GMPLS
    capable.
  • In between, there is translation.
  • GMPLS and MPLS features are not identical, though
    similar.
  • Need to interwork/complement different features
    at the border
  • Integrated model
  • Upgrade MPLS device(s) to speak both MPLS and
    GMPLS.
  • Advanced feature is only via GMPLS-capable nodes.
    (No translation too)
  • Once all devices become GMPLS-capable, the MPLS
    protocols may be turned off.
  • Phased model
  • Add GMPLS feature and protocol element into MPLS
    devices one at a time.
  • No GMPLS introduction

Island model
Integrated model
M1
G5
G2
M4
M3
G3
G1
G4
M2
M5
Do we have to support all three models? Any
opinion?
5
MPLS-GMPLS interwork cases
draft-shiomoto-ccamp-mpls-gmpls-interwork-fmwk-00.
txt
  • MPLS-GMPLS-MPLS
  • GMPLS are either non-PSC or PSC
  • GMPLS-MPLS and MPLS-GMPLS
  • GMPLS is PSC only.

G1
G3
G1
G3
G2
G2
G5
G5
MPLS
MPLS
GMPLS
GMPLS
G6
G4
G6
G4
  • GMPLS-MPLS-GMPLS
  • GMPLS is PSC only.

G1
G3
G1
G3
G2
G2
G5
G5
GMPLS
GMPLS
GPLS
MPLS
MPLS
G6
G4
G6
G4
6
What models are available? To address Issues in
MGM (non PSC) case
draft-shiomoto-ccamp-mpls-gmpls-interwork-fmwk-00.
txt
  • Issues
  • Lack of routing and signaling adjacencies
  • Control plane resource exhaustion
  • TE path computation between MPLS and GMPLS
    domains
  • Models
  • Peer, Overlay, Augmented

Overlay/Augmented
Peer
MPLS
Model Visibility of optical domain
Peer Full
Overlay None
Augmented Partial
D-plane
GMPLS
Do we have to support all three models? Any
opinion?
7
Protocol interwork issues
  • (1) RSVP Objects
  • (Generalized) Label Request object (new C-Type
  • IF_ID.
  • Suggested Label Object
  • Label Set Object
  • Upstream Label Object
  • Restart Cap object
  • Admin Status object
  • Recovery Label object
  • Notify Request object
  • (2) Bidirectional LSP setup
  • (3) Failure recovery
  • (4) Bundling FA-LSP
  • (5) Resource affinity mapping
  • (6) MPLS/GMPLS LSP Priority Mapping
  • (7) Signaling Protected MPLS LSPs

Be selective (is it realistic) or exhaustive (is
it feasible) ? ... any feedback/input ?
8
What's next step?
  • Framework/Strategy i-d
  • Revise draft-shiomoto-ccamp-mpls-gmpls-interwork-f
    mwk-00.txt
  • By merging protocol interworking items etc.(see
    page 7) in draft-kumaki-ccamp-mpls-gmpls-interwork
    ing-01.txt
  • Accepted as WG document?
  • Evaluation/Applicability i-d
  • WG Milestone (CCAMP) February 2006
  • Solution i-d
  • WG Milestone (CCAMP) February 2006
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