Gap Analysis on Open Models for Partially-Disaggregated SDN Optical Transport Environments

Garrich, Miquel; San-Nicolás-Martínez, C.; Moreno-Muro, Francisco-Javier; Lopez-de-Lerma, Arturo Mayoral; Dios, Óscar González de; López, Vı́ctor; Giorgetti, A.; Sgambelluri, Andrea; Tancevski, L.; Verchere, Dominique; Pavón‐Mariño, Pablo

doi:10.1364/ofc.2019.w2a.23

Cited by 7 publications

(10 citation statements)

References 8 publications

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“…In the following subsection we provide the details of the OpenConfig and the OpenROADM, those considered in this paper for handling operational modes and in the experimental implementation. A detailed gap analysis of the two models in the context of optical transport is provided in [17].…”

Section: Towards Open Sdn-enabled Disaggregation: Yang Models Andmentioning

confidence: 99%

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

et al. 2020

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OpenConfig and OpenROADM are emerging as the most relevant initiatives to support partial disaggregation, in which the optical line system is provided by a single vendor while transponders can be provided, in pairs, by different vendors. This way, vendor lock-in is eliminated at the transponder level, without significantly impacting the transmission performance. Although the above initiatives have defined YANG models reaching a good level of maturity, there are still open issues that prevent the full deployment of vendor-neutral partially disaggregated solutions. Among these, the candidate transmission modes in a transponder, including proprietary solutions, are exposed in the YANG models as opaque attributes called Operational (OP) Modes, thus limiting the awareness and the effectiveness of the SDN controller in the selection of the most appropriate transmission mode. In this work, we focus on the open issues related to the configuration and adaptation of transmission parameters. In particular, we focus on the OpenConfig concept of OP Mode enabling the abstraction of transmission complexity but currently preventing an SDN controller to manage transponders in a fully vendor-neutral way. This work first estimates, through a simulative study, the network performance benefit that is achievable by optimizing the OP mode selection. Then, a telemetry-based automated solution is proposed, designed and implemented to enhance the OP mode concept in case of both provisioning and adaptation scenarios (e.g., upon failure), also considering the impact in the tributary/client network. In particular, the following components have been designed and implemented: (i) software agent for OpenConfig transponders; (ii) software agent for OpenROADM line systems, (iii) an automatic telemetryassisted monitoring handler; and (iv) SDN control procedures implemented in the ONOS Controller. The proposed components and comprehensive solution have been evaluated in a network testbed encompassing multi-vendor network elements, successfully demonstrating a full vendor-neutral partially disaggregated provisioning and recovery operations.

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Section: Towards Open Sdn-enabled Disaggregation: Yang Models Andmentioning

confidence: 99%

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

et al. 2020

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“…Subsequently, in the context of INSPIRING-SNI, [19] provided two major contributions. First, it included a gap analysis between different YANG-modeling alternatives (e.g.…”

Section: Sbi Contributionsmentioning

confidence: 99%

“…In terms of NBI, [19] included a brief discussion on two available alternatives at the time of that publication: TAPI that pursued an increase of the optical technology visibility, thus potentially enabling quality-oftransmission (QoT) estimation [12]; and an IETF draft that proposed a YANG model for extending the optical characteristics of the Traffic Engineering topology with several parameters to enable impairment-aware path computation [13]. Additionally, [19] employed the native RESTful API of ONOS [14] for gathering information about available devices and ports. In particular, a Net2Plan extension specifically developed to interact with ONOS used a RESTful interface based on OpenAPI for parsing the JSON messages into the Net2Plan hierarchical model.…”

Section: Nbi and Network Application Contributionsmentioning

confidence: 99%

“…As described above, Fig. 2a) comprises: the overview of SBI alternatives for the interaction between the SDN controller and the agents [18], a demonstration of a Net2Plan-based network application accessing in real-time optical data-plane parameters thought the entire stack [19], a specific software development for the agents interacting with emulated hardware [20], the proposal of a network OaaS architecture and its interface [21], and its usage in an experimental demonstration [22]. Fig.…”

Section: Nbi and Network Application Contributionsmentioning

confidence: 99%

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INSPIRING-SNI: Investigating SDN Programmability Improving Optical South- and North-Bound Interfaces

Alabarce

Bravalheri

Mariño³

2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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Software Defined Networking (SDN) controllers decouple the forwarding data-plane actions, instructed via southbound interfaces (SBI), from the logic control-plane decisions, which can be decided by network applications exploiting the northbound interfaces (NBI). This paper overviews the achievements of INPIRING-SNI, a Marie Sklodowska-Curie Action that aims at enhancing programmability in optical SDN ecosystems from two perspectives: SBI for interacting with optical equipment and NBI for exposing programming abstractions that ease the development of network applications. INSPIRING-SNI focused on disaggregated approaches for SBI based on YANG models while proposing an innovative approach for the NBI based on the concept of network optimization as a service (OaaS) with an extension of the Net2Plan planning tool.

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“…Se están realizando avances en el proceso de descubrimiento de red desde la perspectiva de un controlador SDN en sistemas parcialmente desagregados. En el trabajo propuesto para su presentación en el congreso OFC 2019, se muestra una prueba de concepto donde Net2plan recibe los parámetros de configuración de transponders de Nokia con agentes basados en OpenConfig gracias al uso de la NBI establecida entre el controlador ONOS y la capa de aplicación [Garri19a].…”

Section: Trabajos Futurosunclassified

Planificación y optimización de redes ópticas en el Internet del futuro

Muro¹,

Javier²

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The strict requirements required for the future 5G network, jointly with the high growth forecasts of IP traffic, mainly based on the proliferation of cloud services, create a future panorama full of uncertainties from the perspective of large optical telecommunications networks. Planning and optimization tasks are essential to ensure that the requirements are satisfied in an economically viable manner. This thesis tries to analyze, in the first place, the validity of traffic growth predictions, in the light of current applications in a scenario where the latency requirements imply the evolution of CDNs with the deployment of micro-datacenters. In particular, the effect of this traffic evolution, supported by the optical backbone networks, will be analyzed. Second, the thesis studies some options that allow addressing the expected requirements of the network, from the perspective of three major approaches: a) optimization in the design and management of CDNs, b) programmable control of the network based on software-defined networking and with virtualization in network functions and finally, c) possible introduction of the Space Division Multiplexing (SDM) technology to expand the capacity of transport networks as effective support for the increase of IP traffic. The outcomes of this work conclude, in the first instance, that the evolution of the backbone traffic in the future Internet will depend on the nature of the services that the applications offer, being the balance between user traffic and synchronization one especially determining. On the other hand, the results suggest that place the content close to the users can have direct effect of decreasing the amount of traffic supported by the core networks, in relation to the current forecasts. The use cases analyzed in the SDN-NFV environment determine the need for optimization providing flexibility and programmability in the migration to virtualized systems in the networks. This set of functionalities are essential to satisfy the requirements of the future services in the 5G paradigm. In addition, the proof of concept presented in this thesis supports the joint optimization of network and IT resources for the assistance of service chains in networks based on SDN-NFV. Finally, for SDM-based optical networks, the proposal presented for space channel restriction (SCC) emerges as a valid option to be implemented in ROADMs for flex-grid environments. The validity of this proposal lies in the significant reduction in terms of implementation cost due to its lower complexity and the current availability of the equipment, at the expense of minimal performance degradations, compared to totally permissive options.

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Gap Analysis on Open Models for Partially-Disaggregated SDN Optical Transport Environments

Abstract: We report an analysis of completeness and suitability of OpenConfig, OpenROADM and OpenDevice models, for physical-impairment aware network planning, and a proof-of-concept in a partially disaggregated testbed exposing equipment information to Net2Plan through ONOS.

Cited by 7 publications

References 8 publications

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

INSPIRING-SNI: Investigating SDN Programmability Improving Optical South- and North-Bound Interfaces

Planificación y optimización de redes ópticas en el Internet del futuro

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