GMPLS Control of Ethernet Forwarding

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GMPLS Control of Ethernet Forwarding

• Don Fedyk dwfedyk_at_nortel.com
• Loa Andersson loa_at_pi.se

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References

• draft-fedyk-gmpls-ethernet-pbb-te-00.txt
• draft-andersson-gels-exp-rsvp-te-01.txt
• Draft-fedyk
• tracking IEEE Data Plane
• Adds TE to a PBB network
• Draft-andersson
• experimental implementation
• Uses GMPLS for all modes of connection types
• Multiple label types

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Background

• GMPLS Control of Ethernet Forwarding (GELS)
  concluded that before we adapt GMPLS to Ethernet
  bridging we need an IEEE compliant data plane.
• One data plane that is emerging is Provider
  Backbone Bridges Traffic Engineering
  (IEEE802.1Qay).
• The Acreo implementation references only
  IEEE802.1Q standard
• Other IEEE Ethernet Switching paradigms may be
  defined in the future.
• IEEE802.1Qay is what we initially propose to
  control remaining flexible for other paradigms.

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Conventional Ethernet Bridging
Management Plane
Provisioning (Policy, etc)
Provisioning (Components)
OAM
Bi-directional Data Plane
Ethernet Control Plane
Spanning Tree, Learning, Filtering
Strong Correlation between MP DP or DP CP
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Configured Ethernet Bridging
Management Plane
Provisioning (Components)
OAM
Bi-directional Data Plane
Remove CP dependency
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GMPLS control of Ethernet Forwarding
Management Plane
Provisioning (Components)
Provisioning (Connections)
OAM
Bi-directional Data Plane
IP Control Plane
GMPLS SignalingGMPLS Routing
GMPLS Signaling
What we want to do is add GMPLS
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GELS Motives

• Automates Configuration of Ethernet bridging
• Improvement in the coordination required to
  establish and maintain an ETH-LSP
• Provides Automatic reaction to network changes
• Dynamic connections for P2P TE and P2MP TE
• May be Ships-in-the-night mode with Ethernet
  Control Plane
• Helps interwork Configured Ethernet services with
  MPLS services
• Helps interwork with GMPLS enabled Optical
  Networks
• Enables Inter-layer signaling capability

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GMPLS Components

• Signaling
• GMPLS with extensions for Ethernet Bridging
• IP Control plane
• Limited IP functionality for control plane only
• Routing
• Maintain IP control plane and TE information
• LMP
• Extends the 802.1AB capability
• Path Computation
• On-net/off-net path computations

GMPLS Requirements Small delta from existing
GMPLS specifications
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GELS Axioms

• Native Labels properties
• Bidirectional fate shared data plane
• Bandwidth reservation
• Symmetric, Asymmetric
• Fully Exploits the Ethernet Data Plane
• VID configuration
• MAC VID configuration

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Types of LSPs

• P2P
• MP2P
• P2MP
• MP2MP
• Some terminology differences between the drafts
  (to be sorted out)

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Proposed Generalized Label Request

• Encoding Type Ethernet
• LSP Switching Type Specific to Switching Paradigm
• GPID set to Unknown

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Traffic Parameters

• The traffic parameters (T-spec) defined in
  draft-ietf-ccamp-ethernet-traffic-parameters-01.t
  xt is a good starting point

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Where is Configured Ethernet applicable ?
Backbone Core Bridge (BCB)
Backbone Edge Bridge (BEB)
A native Ethernet TE Technology
Ethernet MAN
Encapsulation keep C-MAC learning to BEBs that
are directly attached to the Ethernet CE device.
Scales Carrier Ethernet Metro networks.
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Where is Configured Ethernet applicable ?
As an native Ethernet Aggregation technology
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Three Layer GMPLS Network
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What do we need to add to GMPLS?

• Code Points for Switching Paradigm
• Label Encoding per Switching Type
• Allow non Label-swapped LSPs
• Coding procedures for the technology
• Rules for Labels
• Rules for Protection

Overall Not a Lot
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Next step

• Add a milestone to the working charter to develop
  a Experimental GELS specification
• Add a milestone to the working groups charter to
  develop a specification of the generic aspects of
  GELS signaling and routing

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Backup
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802.1 ah (PBB) Header
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2
3
4
2
Backbone Destination Address (B-DMAC)
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Backbone Source Address (B-SMAC)
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.1ad Ethertype
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.1ah Ethertype
.1ad B-TAG TCI/VID
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.1ah I-TAG TCI/SID
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Destination Address (C-DMAC)
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Source Address (C-SMAC)
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Encap Ethertype