Analisa dan Simulasi Integrasi Teknologi MPLS dan Diffserv (Differentiated Services)

ABSTRAKSI: Differentiated Services (Diffserv) dapat dipertimbangkan untuk pengembangan dunia internt saat ini, dan Multi Protocol Label Switching(MPLS) menyediakan fast packet switching dan kesempatan untuk rekayasa trafik. Lebih Dari Itu, MPLS dapat menyebar di atas suatu teknologi lapisan link seperti IP, ATM, dan Frame Relay. Maka, kombinasi dari keduanya, Diffserv dan MPLS menyajikan strategi yang sangat attraktif untuk penyedia backbone network. Tugas akhir ini mencoba untuk menjelaskan konsep dari Diffserv, MPLS dan Diffserv + MPLS serta mengilustrasikan keefektifannya menggunakan simulasi dengan NS-2. Dari hasil penelitian dan simulasi Diffserv+MPLS ini menunjukkan keistimewaan fast rerouting dari MPLS dan mengurangi masalah kegagalan link pada jaringan diffserv.Kata Kunci : ABSTRACT: Differentiated Services (DiffServ) is scalable for deployment in today’s Internet, and Multiprotocol Label Switching (MPLS) provides fast packet switching and the opportunity for traffic engineering. Thus, the combination of DiffServ and MPLS presents a very attractive strategy to backbone network providers. This paper attempts to explain the con-cepts of DiffServ + MPLS and illustrate its effectiveness by performing a simulation using Network Simulator (ns-2). The results show the fast rerouting feature of MPLS and how it alleviates the problem of link failures in DiffServ networks.Keyword

ICONA: Inter Cluster ONOS Network Application

Several Network Operating Systems (NOS) have been proposed in the last few years for Software Defined Networks; however, a few of them are currently offering the resiliency, scalability and high availability required for production environments. Open Networking Operating System (ONOS) is an open source NOS, designed to be reliable and to scale up to thousands of managed devices. It supports multiple concurrent instances (a cluster of controllers) with distributed data stores. A tight requirement of ONOS is that all instances must be close enough to have negligible communication delays, which means they are typically installed within a single datacenter or a LAN network. However in certain wide area network scenarios, this constraint may limit the speed of responsiveness of the controller toward network events like failures or congested links, an important requirement from the point of view of a Service Provider. This paper presents ICONA, a tool developed on top of ONOS and designed in order to extend ONOS capability in network scenarios where there are stringent requirements in term of control plane responsiveness. In particular the paper describes the architecture behind ICONA and provides some initial evaluation obtained on a preliminary version of the tool.Comment: Paper submitted to a conferenc

Segment Routing: a Comprehensive Survey of Research Activities, Standardization Efforts and Implementation Results

Fixed and mobile telecom operators, enterprise network operators and cloud providers strive to face the challenging demands coming from the evolution of IP networks (e.g. huge bandwidth requirements, integration of billions of devices and millions of services in the cloud). Proposed in the early 2010s, Segment Routing (SR) architecture helps face these challenging demands, and it is currently being adopted and deployed. SR architecture is based on the concept of source routing and has interesting scalability properties, as it dramatically reduces the amount of state information to be configured in the core nodes to support complex services. SR architecture was first implemented with the MPLS dataplane and then, quite recently, with the IPv6 dataplane (SRv6). IPv6 SR architecture (SRv6) has been extended from the simple steering of packets across nodes to a general network programming approach, making it very suitable for use cases such as Service Function Chaining and Network Function Virtualization. In this paper we present a tutorial and a comprehensive survey on SR technology, analyzing standardization efforts, patents, research activities and implementation results. We start with an introduction on the motivations for Segment Routing and an overview of its evolution and standardization. Then, we provide a tutorial on Segment Routing technology, with a focus on the novel SRv6 solution. We discuss the standardization efforts and the patents providing details on the most important documents and mentioning other ongoing activities. We then thoroughly analyze research activities according to a taxonomy. We have identified 8 main categories during our analysis of the current state of play: Monitoring, Traffic Engineering, Failure Recovery, Centrally Controlled Architectures, Path Encoding, Network Programming, Performance Evaluation and Miscellaneous...Comment: SUBMITTED TO IEEE COMMUNICATIONS SURVEYS & TUTORIAL

An automatic restoration scheme for switch-based networks

International audienceThis paper presents a fully automated distributed resilient routing scheme for switch-based or new generation router based networks. The failure treatment is done locally and other nodes in the network do not need to undertake special actions. In contrast to conventional IP routing schemes, each node routes the traffic on the basis of the entering arc and of the destination. The resulting constraint is that two flows to the same destination entering in a node by a common arc have to merge after this arc. It is shown that this is sufficient for dealing with all single link failure situations, assuming that the network is symmetric and two-link connected. Two heuristic approaches are proposed to handle the corresponding dimensioning problem for large network instances. The proposed method generalizes some methods of literature [6], [8] and provides more cost-efficient solutions