4 documents found, page 1 of 1
Network virtualization - a virtual router performance evaluation
Parreira, Bruno; Melo, Márcio; Soares, João; Carapinha, Jorge; Monteiro, Romeu; Sargento, SusanaNetwork Virtualization is claimed to be a key component of the Future Internet by enabling the coexistence of heterogeneous (virtual) networks on the same physical infrastructure [1], providing the dynamic creation and support of different networks with different paradigms and mechanisms. In order for virtualization to be used in a network operator’s infrastructure, its impact on the network traffic must be stu...
Testing IP differentiated services implementations
Parada, Carlos; Carapinha, Jorge; Fontes, Francisco; Lima, Solange; Carvalho, PauloDiffserv architecture is pointed out as a promising solution for the provision of QoS in the Internet in a scalable manner. The main objective of this work is to test, evaluate and discuss, from a practical point of view, two platforms for implementing Diffserv services: one developed at ICA/EPFL for the Linux OS and the other based on Cisco Systems routers. After comparing the configuration strategy in each pl...
Comparaçao de plataformas para suporte de serviços diferenciados em redes IP
Parada, Carlos; Fontes, Francisco; Carapinha, Jorge; Lima, Solange; Carvalho, PauloO principal objectivo deste trabalho é fazer a comparação, de um ponto de vista prático, de duas plataformas para o suporte de Serviços Diferenciados em redes IP: uma desenvolvida pelo ICA/EPFL para plataformas Linux, e a outra baseada em routers Cisco. Para além de comparar e estabelecer as estratégias de configuração em cada plataforma, funcionalidades Diffserv como a classificação, condicionamento de tráfego...
Arquitecturas para redes privadas virtuais em ATM
Carapinha, Jorge; Valadas, RuiThis paper provides an overview of the main strengths of the ATM technology to establish virtual private networks (VPN) over ATM public networks. Three basic models are analysed: VPN based on permanent end-to-end VPCs, VPN based on permanent VCCs and VPN based on switched VCCs.; Este artigo analisa as principais potencialidades da tecnologia ATM para estabelecer e explorar redes privadas virtuais. São...