Optical Network Integration via GMPLS

	February 15, 2005

GMPLS In a Nutshell

	GMPLS = Generalized MPLS
	Builds on success of MPLS in core IP networks
		Extends notion of “label” to encompass additional transport technologies
			TDM time slot, DWDM/CWDM Lambda, Fiber switching
		Reuses existing IP network protocols
			Topology discovery, TE resource advertisment via OSPF-TE
			Path selection, resource reservation via RSVP-TE
	Industry-wide acceptance, standards are complete

GMPLS Controlled Path

	Reuse of MPLS and IP Control
		Ingress initiates light path setup

Setting the Stage

	Regional Optical Nets (RONs) arrive
		Several up and running, more in the pipeline
		Connection-oriented, control plane enabled (GMPLS, UNI/NNI)
		DWDM, lambda switching, edge-to-edge lightpaths
	User community expectations
		Extreme bandwidth, dedicated and on-demand
		Inter-regional connections
	RONs often interconnected via IP-only networks
		Lambdas not yet always available end-to-end
		IP-only networks may not be control plane enabled
	How can control plane technologies be leveraged to meet user expectations in the current environment?

The Ideal

The Reality

Option 1: Best Effort

Option 2: Manual Stitching

Option 3: End-to-End MPLS

Option 4: Tunneled GMPLS

Option 5: End-to-End GMPLS

Summary

Basic Standards

	Routing
			RFC3630 (OSPF-TE v2)
			draft-ietf-ospf-ospfv3-traffic-02.txt (OSPF-TE v3)
			draft-ietf-ccamp-gmpls-routing-09.txt  (routing architecture)
			draft-ietf-ccamp-ospf-gmpls-extensions-12.txt (OSPF-GMPLS)
	Signaling
			RFC3471 (signaling architecture)
			RFC3209 (RSVP-TE)
			RFC3473 (RSVP-GMPLS)
			OIF-UNI-01.0 (UNI extensions to RSVP)
			OIF-UNI-01.0-R2-Common (UNI extensions to RSVP)
			E-NNI-01.0 (initial xNNI implementation agreement)
	Mature, several interoperable implementations

Inter-domain Drafts

		General requirements for inter-domain TE
				draft-ietf-tewg-interarea-mpls-te-req-02.txt
				draft-ietf-tewg-interas-mpls-te-req-07.txt
					Both WG drafts, under discussion in Sub-IP Area, TEWG
		Specific approaches to inter-domain GMPLS
			draft-ietf-ccamp-inter-domain-framework-00.txt
				Covers reachability, TE discovery, PCE, inter-domain signaling
				WG draft, actively under discussion
			draft-otani-ccamp-interas-GMPLS-TE-01.txt
				Covers inter-AS reachability/TE data sharing, without specifying particular protocols
				Individual draft, discussed at CCAMP meeting 12/04
			draft-ayyangar-ccamp-inter-domain-rsvp-te-01.txt
				Extensions to RSVP-GMPLS for inter-domain signaling
				Individual draft, also discussed at CCAMP meeting 12/04

Slide 15

Multiple LSP Types