| 1. |
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| 2. |
- Bellagamba, Elisa, et al.
(author)
-
Link Failure Detection and Traffic Redirection in an Openflow Network
- 2010
-
Patent (pop. science, debate, etc.)abstract
- Failure detection and traffic redirection are implemented in an OpenFlow switch. Link failure detection packets, such as Bidirectional Forwarding Detection (BFD) packets, are periodically sent out on links to peer OpenFlow switches, such as via the Multi-protocol Label Switching (MPLS) Transport Profile (MPLS-TP). Link failure detection packets are received from the peer OpenFlow switches on the links, and monitored. A link failure is detected if no incoming link failure detection packets are received on a link for a predetermined interval. In the event of a link failure, traffic is redirected from the failed link to a backup link by altering entries on a flow table of the OpenFlow switch.
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| 3. |
- Brewka, Lukasz, et al.
(author)
-
ALPHA Proposal of mapping QoS parameters between UPnP home network and GMPLS access
- 2011
-
In: ACCESS NETWORKS. ; , s. 226-239
-
Conference paper (peer-reviewed)abstract
- This paper is treating the interdomain QoS signaling between the home and access domains with a focus on applying it for providing QoS between a UPnP-QoS based home network and GMPLS based access network. The work presented here is defining a possible approach for an interface between UPnP-QoS and GMPLS in order to move towards end-to-end QoS establishment as well as investigating the complexity of such a solution. We present the QoS parameters and mechanisms in both UPnP-QoS and GMPLS and how they can be matched to create a coherent QoS architecture.
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| 4. |
- Brewka, Lukasz, et al.
(author)
-
QoS enabled resource allocation over an UPnP-QoS/€”GMPLS controlled edge
- 2011
-
In: 2011 IEEE Consumer Communications and Networking Conference, CCNC'2011. - : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 218-222
-
Conference paper (peer-reviewed)abstract
- This paper focuses on the problem of coherent resource allocation within home and access networks. The interdomain QoS signaling discussed here enables the initiation of the QoS provisioning in the home and access from the end device in users home. The home network considered in this paper is UPnP-QoS enabled while the access network is GMPLS based. We propose and implement an interface between aforementioned network segments allowing for end-to-end QoS establishment. We present the QoS parameters and mechanisms in both UPnP-QoS and GMPLS and how they can be matched to create a coherent QoS architecture. Additionally we investigate the complexity of such a solution and present implementation results.
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| 5. |
- Chamania, Mohit, et al.
(author)
-
Intent-based in-flight service encryption in multi-layer transport networks
- 2017
-
In: 2017 Optical Fiber Communications Conference and Exhibition, OFC 2017 - Proceedings. - 9781943580231
-
Conference paper (peer-reviewed)abstract
- We demonstrate multi-layer encrypted service provisioning via the ACINO orchestrator. ACINO combines a novel intent interface with an ONOS-based SDN orchestrator to facilitate encrypted services at IP, Ethernet and optical network layers.
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| 6. |
- Devlic, Alisa, et al.
(author)
-
A use-case based analysis of network management functions in the ONF SDN model
- 2012
-
In: Proceedings - European Workshop on Software Defined Networks, EWSDN 2012. - 9780769548708 ; , s. 85-90
-
Conference paper (peer-reviewed)abstract
- The concept of software-defined networking (SDN) recently gained huge momentum in the industry, driven mainly by IT companies interested in data center applications. In this paper, however, we apply SDN to the carrier domain, which poses additional requirements in terms of network management functions. As a specific use-case we take a virtualized carrier network shared by multiple customers. We consider the current SDN model as defined by the Open Networking Foundation (ONF), including the OpenFlow and OF-config protocols. Through a step-by-step discussion of the rocedures required to configure and manage the virtualized network, we analyze the applicability of the current SDN model as specified by the ONF. As a result, we identify shortcomings and propose necessary extensions to the ONF SDN model. The highlighted extensions include control network bootstrapping considerations, updates to the SDN and NOS model, and most importantly extensions of the OF-config management data model.
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| 7. |
- Devlic, Alisa, et al.
(author)
-
Carrier-grade Network Management Extensions to the SDN Framework
- 2012
-
In: 8th Swedish National Computer Networking Workshop SNCNW 2012 Stockholm.
-
Conference paper (peer-reviewed)abstract
- The concept of software-defined networking (SDN)recently gained huge momentum in the industry, driven mainlyby IT companies interested in datacenter applications. In thispaper, however, we consider SDN applied in the carrier domain,which poses additional requirements on the network architecture,including network management functions. We derive concreterequirements for the use-case of a virtualized multi-provideraccess/aggregation network based on carrier-grade SDN. Wethen provide initial architectural considerations for integrationof network management extensions to the SDN framework asdefined by the Open Networking Foundation (ONF). Architec-tural considerations include definition of the required entities andtheir interactions. Finally, we apply the proposed architecture onthe access/aggregation network use-case, outlining procedures ofhow the network management extensions can enable networkwide and node specific management & configuration
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| 8. |
- Gavler, Anders, et al.
(author)
-
Demonstration of a GMPLS control plane in an integrated Ethernet based access and distribution network
- 2010
-
In: Communications and Photonics Conference and Exhibition (ACP), 2010 Asia. ; , s. 467-468
-
Conference paper (peer-reviewed)abstract
- In next generation optical access the integration with the distribution network will probably become much more pronounced than today with a focus on "Ethernet everywhere". We have demonstrated a multi-layer control plane over a combined access and aggregation network. The implementation is based on modifying and adapting existing GMPLS protocols.
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| 9. |
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| 10. |
- John, Wolfgang, et al.
(author)
-
ANIARA Project - Automation of Network Edge Infrastructure and Applications with Artificial Intelligence
- 2023
-
In: Ada User Journal. - 1381-6551. ; 42:2, s. 92-95
-
Journal article (peer-reviewed)abstract
- Emerging use-cases like smart manufacturing and smart cities pose challenges in terms of latency, which cannot be satisfied by traditional centralized infrastructure. Edge networks, which bring computational capacity closer to the users/clients, are a promising solution for supporting these critical low latency services. Different from traditional centralized networks, the edge is distributed by nature and is usually equipped with limited compute capacity. This creates a complex network to handle, subject to failures of different natures, that requires novel solutions to work in practice. To reduce complexity, edge application technology enablers, advanced infrastructure and application orchestration techniques need to be in place where AI and ML are key players.
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| 11. |
- John, Wolfgang, et al.
(author)
-
Meeting the observability challenges for VNFs in 5G systems
- 2017
-
In: Proceedings of the IM 2017 - 2017 IFIP/IEEE International Symposium on Integrated Network and Service Management. - 9783901882890 ; , s. 1127-1130
-
Conference paper (peer-reviewed)abstract
- 5G mobile communication systems will need to accommodate a variety of use-cases, resulting in a diverse set of requirements. To meet these requirements, 5G systems take advantage of modern virtualization possibilities offered by Network Function Virtualization (NFV), enabling deployment agility and dynamicity of virtualized network functions. With the transformation of telecom towards virtualized environments, advanced observability possibilities gain increasing importance as one of the essential prerequisites, especially for successful DevOps operations. However, deployment agility also puts specific requirements on monitoring solutions in order to adapt automatically and continuously to frequent changes in service deployments. In this short-paper, we establish and discuss essential properties of observability systems for virtual network functions in a 5G context. We take these properties as guiding design principles for our software-defined monitoring framework and outline how to evolve our existing components towards a flexible, scalable, and programmable observability solution for microservice-based NFV with features for increased manageability.
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| 12. |
- John, Wolfgang, et al.
(author)
-
Scalable Software Defined Monitoring for Service Provider DevOps
- 2015. - 11
-
In: 2015 Fourth European Workshop on Software Defined Networks. - 9781509001804 ; , s. 61-66
-
Conference paper (peer-reviewed)abstract
- Technology trends such as Cloud, SDN, and NFV are transforming the telecommunications business, promising higher service flexibility and faster deployment times. They also allow for increased programmability of the infrastructure layers. We propose to split selected monitoring control functionality onto node-local control planes, thereby taking advantage of processing capabilities on programmable nodes. Our software defined monitoring approach provides telecom operators with a way to handle the trade off between high-granular monitoring information versus network and computation loads at central control and management layers. To illustrate the concept, a link rate monitoring function is implemented using node-local control plane components. Furthermore, we introduce a messaging bus for simple and flexible communication between monitoring function components as well as control and management systems. We investigate scalability gains with a numerical analysis, demonstrating that our approach would generate thousand fold less monitoring traffic while providing similar information granularity as a naive SNMP implementation or an Open Flow approach.
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| 13. |
- John, Wolfgang, et al.
(author)
-
Service provider DevOps
- 2017
-
In: IEEE Communications Magazine. - 0163-6804 .- 1558-1896. ; 55:1, s. 204-211
-
Journal article (peer-reviewed)abstract
- Although there is consensus that software defined networking and network functions virtualization overhaul service provisioning and deployment, the community still lacks a definite answer on how carrier-grade operations praxis needs to evolve. This article presents what lies beyond the first evolutionary steps in network management, identifies the challenges in service verification, observability, and troubleshooting, and explains how to address them using our Service Provider DevOps (SP-DevOps) framework. We compendiously cover the entire process from design goals to tool realization and employ an elastic version of an industry-standard use case to show how on-the-fly verification, software-defined monitoring, and automated troubleshooting of services reduce the cost of fault management actions. We assess SP-DevOps with respect to key attributes of software-defined telecommunication infrastructures both qualitatively and quantitatively, and demonstrate that SP-DevOps paves the way toward carrier-grade operations and management in the network virtualization era.
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| 14. |
- John, W., et al.
(author)
-
Splitarchitecture : SDN for the carrier domain
- 2014
-
In: IEEE Communications Magazine. - 0163-6804 .- 1558-1896. ; 52:10, s. 146-152
-
Journal article (peer-reviewed)abstract
- The concept of SDN has emerged as a way to address numerous challenges with traditional network architectures by decoupling network control and forwarding. So far, the use cases for SDN mainly targeted data-center applications. This article considers SDN for network carriers, facing operation of large-scale networks with millions of customers, multiple technologies, and high availability demands. With specific carriergrade features such as scalability, reliability, flexibility, modularity, and virtualization in mind, the SPARC EU project has developed the SPARC SplitArchitecture concept. The SplitArchitecture control plane allows hierarchical layering of several control plane layers which can be flexibly mapped to data plane layers. Between control layers open interfaces are used. Furthermore, SplitArchitecture proposes an additional split of forwarding and processing functions in data path elements, enabling switch based OAM functionality and handling of tunneling techniques. The SplitArchitecture concept is evaluated in a prototype demonstrating an SDN version of BRAS: the floating BRAS. The floating BRAS allows creation of residential Internet access services with dynamically managed BRAS instances. The demo is based on a controller enabling protected MPLS transport connections spanning SDN-controlled aggregation and IP/MPLS-based core domains. The prototype showcases how SplitArchitecture enables virtualization of service nodes in an SDN-controlled network, leading to increased flexibility in configuration and placement of service creation functions. Overall, the results show that it is technically and economically beneficial to apply SDN, and specifically the SplitArchitecture concept, to the carrier domain.
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| 15. |
- Kempf, James, et al.
(author)
-
Scalable fault management for OpenFlow
- 2012
-
In: IEEE International Conference on Communications. - 9781457720529 ; , s. 6606-6610
-
Conference paper (peer-reviewed)abstract
- In the OpenFlow based split architecture, data-plane forwarding is separated from control and management functions. Forwarding elements make only simple forwarding decisions based on flow table entries populated by the controller. While OpenFlow does not specify how topology monitoring is performed, the centralized controller can use Link-Layer Discovery Protocol (LLDP) messages to discover link and node failures and trigger restoration actions. This monitoring and recovery model has serious scalability limitations because the controller has to be involved in the processing of all of the LLDP monitoring messages. For fast recovery, monitoring messages must be sent with millisecond interval over each link in the network. This poses a significant load on the controller. In this paper we propose to implement a monitoring function on OpenFlow switches, which can emit monitoring messages without posing a processing load on the controller. We describe how the OpenFlow 1.1 protocol should be extended to support the monitoring function. Our experimental results show that data plane fault recovery can be achieved in a scalable way within 50 milliseconds using this function.
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| 16. |
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| 17. |
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| 18. |
- Lopez, Victor, et al.
(author)
-
The role of SDN in application centric IP and optical networks
- 2016
-
In: Journal of green engineering. - : River Publishers. - 1904-4720 .- 2245-4586. ; 6:3, s. 317-336
-
Journal article (peer-reviewed)abstract
- Transport IP/optical networks are evolving in capacity and dynamicity of configuration. This evolution gives little to no attention to the specific needs of applications, beyond increasing raw capacity. TheACINO concept is based on allowing applications to explicitly specify requirements for requested services in terms of high-level (technology- and configuration-agnostic) requirements such as maximum latency or reliability. These requirements are described using intents and certain primitives which facilitate translation to technology specific configuration within the ACINO infrastructure. To support this application centric approach, SDN has a key role in this evolution. There are representative use cases where SDN gives an added value when considering not only the network but also the application layer.
|
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| 19. |
- Lopez, Victor, et al.
(author)
-
The role of SDN in Application Centric IP and Optical Networks
- 2016
-
In: 2016 European Conference on Networks and Communications (EuCNC). - : IEEE. - 9781509028931 - 9781509028948 ; , s. 138-142
-
Conference paper (peer-reviewed)abstract
- Transport IP/optical networks are evolving in capacity and dynamicity configuration. This evolution gives little to no attention to the specific needs of applications, beyond raw capacity. The ACINO concept is based on facilitating applications to explicitly specify requirements for requested services in terms of high-level (technology agnostic) requirements such as maximum latency or reliability. These requirements are described using intents and certain primitives which facilitate translation to technology specific configuration within the ACINO infrastructure. To support this application centric approach, SDN must have a key role in this evolution. There are representative use cases where SDN gives an added value when considering not only the network but also the application layer.
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| 20. |
- Marsh, Ian, et al.
(author)
-
Evolving 5G : ANIARA, an edge-cloud perspective
- 2021
-
In: Proceedings of the 18th ACM International Conference on Computing Frontiers 2021, CF 2021. - New York, NY, USA : Association for Computing Machinery, Inc. - 9781450384049 ; , s. 206-207
-
Conference paper (peer-reviewed)abstract
- ANIARA (https://www.celticnext.eu/project-ai-net) attempts to enhance edge architectures for smart manufacturing and cities. AI automation, orchestrated lightweight containers, and efficient power usage are key components of this three-year project. Edge infrastructure, virtualization, and containerization in future telecom systems enable new and more demanding use cases for telecom operators and industrial verticals. Increased service flexibility adds complexity that must be addressed with novel management and orchestration systems. To address this, ANIARA will provide en-ablers and solutions for services in the domains of smart cities and manufacturing deployed and operated at the network edge(s). © 2021 Owner/Author.
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| 21. |
- Marsico, Antonio, et al.
(author)
-
An interactive intent-based negotiation scheme for application-centric networks
- 2017
-
In: 2017 IEEE Conference on Network Softwarization. - 9781509060085
-
Conference paper (peer-reviewed)abstract
- The demonstration presents the first implementation of a resource negotiation scheme between users and a network for the provisioning of application-aware connectivity services. This active interaction enables the users, who request connectivity services with multiple application requirements, to select an alternative solution when the network does not have enough resources to satisfy the original requests.
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| 22. |
- Marsico, Antonio, et al.
(author)
-
Enriching intent-based SDN to ease customer service management in transport networks
- 2018
-
In: <em></em> Find other works by these authors Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF) OSA Technical Digest (online) (Optical Society of America, 2018), paper NeW2F.2. - 9781557528209
-
Conference paper (peer-reviewed)abstract
- Intent-based Software-Defined Networking can automate mapping of customer services to transport services. We demonstrate this using a multi-layer orchestrator that provisions a complex customer service over an IP/Optical testbed.
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| 23. |
- Matias, Jon, et al.
(author)
-
FlowSNAC : Improving FlowNAC with secure scaling and resiliency
- 2016
-
In: 2016 Fifth European Workshop on Software-Defined Networks (EWSDN). - 9781509061464 ; , s. 59-61
-
Conference paper (peer-reviewed)abstract
- Life-cycle management of stateful VNF services is a complicated task, especially when automated resiliency and scaling should be handled in a secure manner, without service degradation. We present FlowSNAC, a resilient and scalable VNF service for user authentication and service deployment. FlowSNAC consists of both stateful and stateless components, some of that are SDN-based and others that are NFVs. We describe how it adapts to changing conditions by automatically updating resource allocations through a series of intermediate steps of traffic steering, resource allocation, and secure state transfer. We conclude by highlighting some of the lessons learned during implementation, and their wider consequences for the architecture of SDN/NFV management and orchestration systems.
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| 24. |
- Nemeth, Felician, et al.
(author)
-
Roles of DevOps tools in an automated, dynamic service creation architecture
- 2015. - 11
-
In: 2015 IFIP/IEEE International Symposium on Integrated Network Management (IM). - 9781479982417 ; , s. 1153-1154
-
Conference paper (peer-reviewed)abstract
- Software Defined Networking (SDN) and Network Functions Virtualization facilitate, with their advanced pro- grammability features, the design of automated dynamic service creation platforms. Applying DevOps principles to service design can further reduce service creation times and support continuous operation. Monitoring, troubleshooting, and other DevOps tools can have different roles within virtualised networks, depending on virtualization level, type of instantiation, and user intent. We have implemented and integrated four key DevOps tools that are useful in their own right, but showcase also an integrated scenario, where they form the basis for a more complete and realistic DevOps toolkit. The current set of tools include a message bus, a rudimentary configuration tool, a probabilistic congestion detector, and a watchpoint mechanism. The demo also presents potential roles and use-cases for the tools.
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| 25. |
- Nordell, Viktor, et al.
(author)
-
BFD-triggered, GMPLS-based, multi-layer ethernet access network protection
- 2011
-
In: 2011 Asia Communications and Photonics Conference and Exhibition, ACP 2011.
-
Conference paper (peer-reviewed)abstract
- In this paper we present a solution for providing protection in a Ethernet based access and metro network. To accomplish this we targeted two issues, protection aimed path computation in networks which does not provide fully disjoint paths, and the design and implementation of bi-directional forward detection (BFD) protocol in a GMPLS controlled Ethernet network. To the best of our knowledge, neither issue has been previously addressed through a similar approach and is therefore to be considered novel in its design and implementation. Our implementation shows good performances and reliability in both performance testing and testbed experiments.
|
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| 26. |
- Nordell, Viktor, et al.
(author)
-
GMPLS controlled multi-layer ethernet
- 2010
-
In: Proceedings of SPIE Conference Volume 7989. - : SPIE.
-
Conference paper (peer-reviewed)abstract
- This paper presents the novel idea of using GMPLS control plane for all flavors of an IEEE 802.1Q multi-layer Ethernet, applied to an access and aggregation network scenario. Such a network could provide better resilience, control of resource allocation, bandwidth guarantees and the possibility of having a unified control plane in an environment that includes more and more type of forwarding technologies.It might also be possible to reuse existing equipment and provide backward compatibility for legacy systems when deploying such a GMPLS network over an existing Ethernet based network.This was accomplished through extending GMPLS protocols by defining a new switch capability object, new label object for ML Ethernet, and the development of control plane procedures for handling scenarios specific to ML Ethernet. These extensions has been implemented and verified, along with the development of a ML Ethernet aware PCE, and the results indicates that this novel architecture is plausible and his an interesting potential.
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| 27. |
- Pederzolli, Federico, et al.
(author)
-
SDN application-centric orchestration for multi-layer transport networks
- 2016
-
In: 2016 18th International Conference on Transparent Optical Networks (ICTON). - 9781509014675
-
Conference paper (peer-reviewed)abstract
- Modern IP/Optical transport networks are seldom jointly operated and optimized, and do not cater to the usually implicit requirements of applications, which ultimately drive network traffic. In this concept paper we propose a Software Defined Networking (SDN) based Network Orchestrator to manage multi-layer transport networks while taking explicit application requirements into account. We discuss its architecture and requirements, an interface to allow applications to explicitly specify their requirements in a network-agnostic manner, and possible strategies to optimize the network taking these requirements into account.
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| 28. |
- Popov, Mikhail, et al.
(author)
-
Integration of QoS provisioning in home and access networks
- 2010
-
In: Access Networks and In-house Communications.
-
Conference paper (peer-reviewed)abstract
- Approaches for QoS provisioning using UPnP for home networks and GMPLS for access networks are described. A solution for interworking the UPnP and the GMPLS at the residential gateway is proposed
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| 29. |
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| 30. |
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| 31. |
- Sköldström, Pontus, et al.
(author)
-
DISMI - An intent interface for application-centric transport network services
- 2017
-
In: International Conference on Transparent Optical Networks. - 9781538608586
-
Conference paper (peer-reviewed)abstract
- Application-centric networking is a novel approach to construct transport networks that allows application-specific requirements to be taken into account through the entire service provisioning process: the service offered to each application is differentiated at each layer of the transport network, from IP to optical. This approach replaces the grooming of traffic with different requirements into a shared path in the transport layer, and allows for a finer control and utilization of network resources by network operators. To make this concept viable, an interface for requesting a connectivity service by applications requires an abstraction with respect to the various underlying network technologies. Interfaces based on the concept of Intents provide such an abstraction: applications can describe what they need from the network (their requirements) rather than how to achieve them. This paper describes the design and implementation of the solution we propose: DISMI, the Intent-based North-Bound Interface of a network controller.
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| 32. |
- Sköldström, Pontus, et al.
(author)
-
Implementation and evaluation of a carrier-grade openflow virtualization scheme
- 2013
-
In: Proceedings - 2013 2nd European Workshop on Software Defined Networks, EWSDN 2013. - : IEEE Computer Society. - 9781479924332 ; , s. 75-80
-
Conference paper (peer-reviewed)abstract
- Software Defined Networking (SDN) concepts are seen as suitable enablers for network virtualization, especially in the Data Center Network domain. However, also carrier network operators can benefit from network virtualization, since it allows new business models, promising economical benefits through sharing the cost of network infrastructure in e.g. multi-tenancy or service-isolation scenarios. Such use-cases pose additional requirements on virtualization schemes, including strict performance and information isolation, transparency of the virtualization system, high availability, as well as low CAPEX and OPEX demands. In order to fulfill these requirements, we previously proposed a flexible virtualization scheme for OpenFlow. In this paper we discuss the implementation of the proposed scheme and point out relevant lessons learned during the process, leading to architectural and technological updates. We then evaluate the system in terms of data path performance: the impact on forwarding latency is negligible, while the impact on network throughput is depending on the type of traffic and the choice of encapsulation technology. In summary, the overhead can be kept small and would not significantly affect a production network. Thus, we conclude that the minor performance degradations are outweighed by the benefits of the virtualization system.
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| 33. |
- Sköldström, Pontus, et al.
(author)
-
Making powerful friends : Introducing ONOS and Net2Plan to each other
- 2017
-
In: International Conference on Transparent Optical Networks. - 9781538608586
-
Conference paper (peer-reviewed)abstract
- In this paper, we present our efforts for integrating network control and network planning, connecting the popular open-source ONOS control platform with Net2Plan, an open source network planner. The integration allows ONOS to use Net2Plan, combined with our resource allocation framework, as an on-line network optimization tool, calculating and re-routing paths as new requests arrive. It also lets Net2Plan obtain an up-to-date topology from ONOS. Net2Plan can then use the topology and our algorithms to perform planning operations such as investigating hypothetical questions about consequences of network failures or additional network equipment. The interface also lets the paths computed by the algorithms running on Net2Plan to be transferred to ONOS and implemented in the running network. While we currently only support IP/Optical networks, additional layers could easily be incorporated. As an interesting side-effect, code used for network simulation can be instrumented and applied to the real network.
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| 34. |
- Sköldström, Pontus, et al.
(author)
-
Network virtualization and resource allocation in OpenFlow-based wide area networks
- 2012
-
In: IEEE International Conference on Communications. - 9781457720529 ; , s. 6622-6626, s. 6622-6626
-
Conference paper (peer-reviewed)abstract
- In this paper we investigate a number of network virtualization models for OpenFlow networks. Specifically, we investigate three sub-modules of the system - the control channel and the software and hardware parts of an OpenFlow switch. We propose a number of extensions to the OpenFlow specification for this purpose and present a model of a full solution that compared to existing systems provides stricter isolation between different virtual networks while at the same time providing more flexibility.
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| 35. |
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| 36. |
- Sköldström, Pontus, et al.
(author)
-
Virtual aggregation using SDN
- 2013
-
In: Proceedings - 2013 2nd European Workshop on Software Defined Networks, EWSDN 2013. - : IEEE Computer Society. - 9781479924332 ; , s. 56-61
-
Conference paper (peer-reviewed)abstract
- We describe the design and implementation of a system for performing Virtual Aggregation, a method for dividing and spreading a forwarding table over multiple forwarding elements, in an SDN/OpenFlow network. The primary use-case for this method is to alleviate the scalability problems caused by a rapidly growing routing table in the Default-Free Zone (i.e. the BGP routers on the Internet), secondly it could be extended to support OpenFlow network abstractions. The design provides a scalable system for quickly dividing and distributing a forwarding table in an SDN environment running NOX and OpenFlow 1.1. After evaluating the system we conclude that our design is fast, scalable, and extensible.
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| 37. |
- Sköldström, Pontus, 1983-, et al.
(author)
-
Virtualizing Open Access Networks
- 2011
-
In: 7th Swedish National Computer Networking Workshop (SNCNW).
-
Conference paper (peer-reviewed)abstract
- Existing network virtualization methods in Open-Flow networks are lacking in many respects, especially whenapplied in multi-tenant scenarios such as open access networks. Inthis paper we investigate how OpenFlow can be used to simplifythe use and management of a shared network infrastructure inopen access networks. We then present initial ideas on how toimprove virtualization in OpenFlow networks by applying novelmethods to virtualize the forwarding plane itself.
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| 38. |
- Soenen, Thomas, et al.
(author)
-
A model to select the right infrastructure abstraction for Service Function Chaining
- 2017
-
In: 2016 IEEE Conference on Network Function Virtualization and Software Defined Networks, NFV-SDN 2016. - 9781509009336 ; , s. 233-239
-
Conference paper (peer-reviewed)abstract
- Through network function virtualization (NFV), telecom providers aim to flexibly re-use generic-purpose hardware to provide services on-demand and in an agile way. Service function chaining is becoming the preferred model to describe the characteristics of the packet-processing network functions which, together, form these services. NFV allows for network function embedding freedom, creating new dynamics between providers and the users requesting services. Users want this freedom to optimise the performance of their requested services, while providers aim to optimise their resource cost with it. This trade-off is heavily influenced by how the available infrastructure is exposed to the users. In this paper, we present an infrastructure abstraction model for network, compute and storage resources that exposes the infrastructure in an abstracted manner. We use this abstraction to propose a solution for the placement freedom trade-off problem by studying its relation with metrics that capture both the user's and the provider's aspects. We conclude with a heuristic that determines the right abstraction for particular scenarios.
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| 39. |
- Tomkos, Ioannis, et al.
(author)
-
Application Aware Multilayer Control and Optimization of Elastic WDM Switched Optical Networks
- 2018
-
In: 2018 Optical Fiber Communications Conference and Exposition (OFC). - 9781943580385 ; , s. 1-3
-
Conference paper (peer-reviewed)abstract
- In dynamic networks with diverse application requirements, Software Defined Networking (SDN) principles enable application-aware in-operation planning. Project ACINO built a network orchestrator as the connecting component between network applications and the underlying network infrastructure.
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| 40. |
- Van Rossem, Steven, et al.
(author)
-
NFV service dynamicity with a DevOps approach : Insights from a use-case realization
- 2017
-
In: Proceedings of the IM 2017 - 2017 IFIP/IEEE International Symposium on Integrated Network and Service Management. - 9783901882890 ; , s. 674-679
-
Conference paper (peer-reviewed)abstract
- This experience paper describes the process of leveraging the NFV orchestration platform built in the EU FP7 project UNIFY to deploy a dynamic network service exemplified by an elastic router. Elasticity is realized by scaling dataplane resources as a function of traffic load. To achieve this, the service includes a custom scaling logic and monitoring capabilities. An automated monitoring framework not only triggers elastic scaling, but also a troubleshooting process which detects and analyzes anomalies, pro-actively aiding both dev and ops personnel. Such a DevOps-inspired approach enables a shorter update cycle to the running service. We highlight multiple learnings yielded throughout the prototype realization, focussing on the functional areas of service decomposition and scaling; programmable monitoring; and automated troubleshooting. Such practical insights will contribute to solving challenges such as agile deployment and efficient resource usage in future NFV platforms.
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| 41. |
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