NAME OF I-D: http://www.ietf.org/internet-drafts/draft-papadimitriou-optical-rings-00.txt SUMMARY: The scope of this draft is to specify the IP-based signaled protection mechanisms for optical rings and hybrid optical mesh-ring topologies. With the dynamic ring configuration process, we determine the information to be distributed to dynamically emulate optical rings on top of a meshed optical network topology. This information exchange further enables the specification of Optical Ring Traffic Engineering. Within the IP Control-based signaling plane, we also specify the mechanisms to provide dynamic and fast-protection switching, and distributed LSP route computation on top of ring-based and hybrid mesh-rings optical networks.. RELATED DOCUMENTS http://www.ietf.org/internet-drafts/draft-ietf-mpls-generalized-signaling-04.txt http://www.ietf.org/interent-drafts/draft-ietf-mpls-generalized-cr-ldp-03.txt http://www.ietf.org/interent-drafts/draft-ietf-mpls-generalized-rsvp-te-03.txt http://www.ietf.org/internet-drafts/draft-ietf-mpls-lmp-02.txt http://www.ietf.org/internet-drafts/draft-ietf-mpls-cr-ldp-05.txt http://www.ietf.org/internet-drafts/draft-awduche-mpls-te-optical-03.txt http://www.ietf.org/internet-drafts/draft-fredette-lmp-wdm-01.txt http://www.ietf.org/internet-drafts/draft-ghani-optical-rings-01.txt http://www.ietf.org/internet-drafts/draft-guo-optical-mesh-rings-00.txt http://www.ietf.org/internet-drafts/draft-katz-yeung-ospf-traffic-04.txt http://www.ietf.org/internet-drafts/draft-ietf-isis-gmpls-extensions-01.txt http://www.ietf.org/internet-drafts/draft-kompella-ospf-gmpls-extensions-01.txt http://www.ietf.org/internet-drafts/draft-kompella-mpls-bundle-05.txt http://www.ietf.org/internet-drafts/draft-many-inference-srlg-00.txt http://www.ietf.org/internet-drafts/draft-many-ip-optical-framework-03.txt http://www.ietf.org/internet-drafts/draft-many-optical-restoration-00.txt http://www.ietf.org/internet-drafts/draft-pbh-packet-optical-restoration-01.txt http://www.ietf.org/internet-drafts/draft-poj-optical-multicast-00.txt http://www.ietf.org/internet-drafts/draft-rs-optical-bundling-01.txt http://www.ietf.org/internet-drafts/draft-venkatachalam-ospf-traffic-00.txt http://www.ietf.org/rfc/rfc-2328.txt http://www.ietf.org/rfc/rfc-2370.txt WHERE DOES IT FIT IN THE PICTURE OF THE SUB-IP WORK OPT (IP Over Optical) WHY IS IT TARGETED AT THIS WG. This draft could be merged with draft-guo-optical-mesh-ring-00.wri (it has been proposed to the author's of this document and the outcome should be a common document - to be published) Things become more complex when considering the intrication of optical rings as proposed in many related documents: - Today, optical rings are not considered within the IPO charter since MPL(ambda)S/GMPLS framework is fundamentally related to IP routing meshed networks. As specified in the current drafts, GMPLS is largely geared to support dynamic optical mesh networks. Consequently, if there is no re-chartering of the CCAMP WG, it does not seem the most appropriate to submit it at the CCAMP WG. Even if protocol extensions are potentially tightly related to current the GMPLS developments - IPoRPR WG does not seem (as chartered today) the best WG to submit such item since this WG is focused on native packet rings rather than transport of packets on top of an optical ring - Concerning the TE WG the question is more difficult to answer since up to now TE WG was rather focused on IP-based traffic- engineering mechanisms but not specifically on non-packet based traffic-engineering mechanisms. However, since extensions for non-packet based networks involve the IP-based GMPLS control plane if the TE WG charter is re-considered then TE WG could be considered as well for future developments. JUSTIFICATION Given the large knwoledge base of ring topologies, currently many operators are planning for a migration to equivalent dynamic optical ring architectures (i.e., associated with deploying mesh networks). since this contribution is targeted to cover hybrid mesh rings networks. Moreover the proposed approach does not restrict the physical implementation of the ring architecture, and extensions of current MPL(ambda)S/GMPLS protocol suite should provide enough flexibility in order to dynamically provision optical hybrid mesh- ring networks. The concept of optical ring emulation applies when considering the ring configuration on top of optical mesh topology including Optical Cross-Connects (OXC) and not only Optical Add-Drop-Multiplexers (O- ADM). Compared to the approach proposed in [IPO-RFR] and developed in [IPO-OMR], emulated optical rings add configuration flexibility when considering optical network protection; these approach are not exclusive but rather complementary. The mechanisms developed enable the deployment of hybrid mesh-rings optical network topologies. It also provides a clear separation between the dynamic ring configuration and the dynamic ring resource allocation. This allows a greater ring resource management flexibility that fits more suitably the bandwidth on demand requirements for optical networks. The approach developed combines distributed fast link protection mechanism and signalling message exchange between nodes when a failure is detected on a link connecting to adjacent nodes belonging to the same ring. In order to specify these mechanisms, we first describe the optical ring concept currently under development at the ITU-T to determine the corresponding mechanism for all-optical rings. Moreover, the set of drafts covering the optical rings are targeted fundamentally to improve the current "mesh optical networks" developments, both approach are complementary and do not compete with each other. Basically, the deployment of optical mesh or ring or hybrid networks depends on the carrier needs.
draft-papadimitriou-optical-rings-01.txt