Implementasi Redundant Switch Menggunakan CISCO Catalyst Di PT. Citra Solusi Pratama

Spanning Tree protocol atau yang sering disingkat dengan STP adalah metode pada jaringan yang menjamin tidak adanya loop dalam jaringan. Dengan model jaringan OSI untuk jaringan komputer, STP ada di layer 2 OSI. Spanning tree protocol memperbolehkan desain jaringan memiliki redundant link untuk membuat jalur backup otomatis. Dengan menggunakan metode spanning tree protocol maka apabila perangkat switch cisco catalyst tersebut down maka akan berimbas pada jaringan tersebut karena sudah ada backup link. Apabila main link down atau terputus, maka port yang tadi terblok akan terbuka oleh switch, sehingga data dari komputer pengirim akan melewati redundant.Kata Kunci: Jaringan, Komputer, Spanning

Layer 2 Path Evaluation System using Machine Learning

Is it strange that the spanning tree protocol (STP) has been the only thing used to defend the Layer-2 backbone against looping? Do we trust it? For several decades, the campus backbone has often been an unsuspected problem, one of which is STP failure. Meanwhile, the MAC address flapping is probably a feasible issue for modern network fabrics. According to the serious Layer-2 issues, particularly the legacy switches extended STP design, this work uses the notion of a software-defined network fashion to evaluate the traditional and modern networks. Through the MAC address lookup of all bridge devices, this work proposes the Layer-2 evaluation system (LES), which uses a novel approach known as support supervised learning to create the data preparation for machine learning. Additionally, the LES enabled network administrators to determine their backbones. This study is intended to evaluate the potential slowdown network caused by MAC address problems. Furthermore, this work investigates the proposed method in a real network, and it also covers the evaluation and performance of our proposed method.

MPResiSDN: Multipath Resilient Routing Scheme for SDN-Enabled Smart Cities Networks

The number of smart cities is increasing rapidly around the world with the continuous increase of governments’ interest in exploiting Information and Communication Technologies (ICT) to solve issues arising from rapid urbanization. Most smart city services rely fundamentally on ubiquitous sensing, enabled by Wireless Sensor Network (WSN) technologies. However, WSNs in smart cities are naturally vulnerable to unavoidable external challenges like storms, fires, and other natural disasters. Such challenges pose a great threat to smart city infrastructure, including WSNs, as they might affect network connectivity or result in complete blockages of network services. However, some particular smart city services are critical, to the point where they must remain available in all situations, especially during disasters; to monitor the disaster and obtain sensory information needed for controlling it, limiting its danger, or for decision-making during rescue operations. Thus, it is crucial to design a smart-city network to maintain connectivity against such challenges. In this paper, we introduce MPResiSDN, a MultiPath Resilient routing system based on Software Defined Networking (SDN). The system introduced exploits SDN’s capabilities and aided-multipath routing to reactively provide connectivity in smart city networks in the presence of challenges. We evaluated our proposed system under simulations of different natural disasters. The results demonstrate that the system improved data delivery under the challenges by as much as 100% compared to the Spanning Tree Protocol when a suitable value for k diverse paths was selected.

Balanceamento de Carga entre Caminhos utilizando Redes Definidas por Software

É comum que redes de datacenters utilizem o modelo de rede Ethernet com encaminhamento de pacotes por caminho único baseado no Spanning Tree Protocol (STP), de forma a evitar loops na rede. Porém, tal fato não permite a utilização de enlaces ociosos para diminuir o congestionamento e aumentar a largura de banda agregada da rede. Uma forma de contornar este problema é realizar o balanceamento de carga entre enlaces. Este trabalho apresenta uma proposta de mecanismo de balanceamento de carga entre caminhos utilizando redes definidas por software (SDNs - Software Defined Networks).

An Improved Approach for Eliminating the Loop in Hybrid Software Defined Network (SDN) Using Modified Bellman-Ford Algorithm

SDN is approaching its own structure of acceptance. Therefore, the increasing deployment of SDNs is being discussed as a possible approach, appearing in the development of the hybrid SDN networks. An foremost work in the hybrid SDN networks is bandwidth allocation, taking into account the integration of both SDN-enabled and conventional switches. The network loop in layer 2 switches is skipped in Spanning Tree Protocol (STP) by ceaselessly watching the network to trace all links and block the unwanted ones. Bridge loops will occur anytime there’s a redundant Layer2 way between ends. By default, switches forward broadcast/multicast out all ports, other than the port from that the broadcast/multicast was delivered. Once a switch loop is brought in the network, broadcast messages are going to be broadcasted more often leading to broadcast storms. The Spanning-tree algorithm enforces a distributed divergent of the Bellman-Ford iterative algorithm that always looks for the optimal solution and selects an optimal influential switch anytime. In this paper we use controller’s global network view for resolving loop problem in layer 2 network. SDN controller acts on broadcast packets received from switch-ports and host-ports differently that is if the broadcast packets received from host ports, the SDN controller broadcasts these packets to all ports and if broadcast packets is received from switch ports, only some switches broadcasts these packets on all ports instead of all switches.

Sunrays Microcomputer FDDI Optical Fiber Computer Network Security System Design

Background: In order to solve the potential safety hazard of computer network security, a special congestion control strategy is adopted. Methods: This strategy used to discuss the design and implementation technology of network adapter, bridge, concentrator, device driver, Netware interface software, and a complete set of FDDI optical fiber computer network. All source address tracking, frame forwarding, frame format conversion, spanning tree protocol, and other functions are achieved. Results: The research shows that the Sunrays micro-computer follows the SNMP simple network management protocol, which can support multiple Ethernet protocols and multiple ports, and the number of ports is scalable. Conclusion: The proposed method is useful for the multiple input and output ports in computer network with security enabled congestion control for data traffic.