http://hdl.handle.net/10016/883 Wed, 19 Jun 2013 18:57:26 GMT 2013-06-19T18:57:26Z http://hdl.handle.net/10016/16995 Title: BGP-XM: BGP eXtended Multipath for Transit Autonomous Systems Author(s): Camacho Camacho, Jose Manuel; García-Martínez, Alberto; Bagnulo, Marcelo; Valera Pintor, Francisco Abstract: Multipath interdomain routing has been proposed to enable flexible traffic engineering for transit Autonomos Systems (ASes). Yet, there is a lack of solutions providing maximal path diversity and backwards compatibility at the same time. The BGP-XM (Border Gateway Protocol-eXtended Multipath) extension presented in this paper is a complete and flexible approach to solve many of the limitations of previous BGP multipath solutions. ASes can benefit from multipath capabilities starting with a single upgraded router, and without any coordination with other ASes. BGP-XM defines an algorithm to merge into regular BGP updates information from paths which may even traverse different ASes. This algorithm can be combined with different multipath selection algorithms, such as the K-BESTRO (K-Best Route Optimizer) tunable selection algorithm proposed in this paper. A stability analysis and stable policy guidelines are provided. The performance evaluation of BGP-XM, running over an Internet-like topology, shows that high path diversity can be achieved even for limited deployments of the multipath mechanism. Further results for large-scale deployments reveal that the extension is suitable for large deployment since it shows a low impact in the AS path length and in the routing table size. Tue, 12 Mar 2013 23:00:00 GMT http://hdl.handle.net/10016/16995 2013-03-12T23:00:00Z http://hdl.handle.net/10016/16994 Title: SAVI: The IETF Standard in Address Validation Author(s): Bagnulo, Marcelo; García-Martínez, Alberto Abstract: In this article we describe Source Address Validation Implementation (SAVI), a security architecture being standardized by the IETF to prevent source address spoofing within a link. SAVI devices, usually layer 2 switches, create bindings between the IP address of a node and a property of the host¿s network attachment, such as the port through which the packet is received. Bindings are created by monitoring the packet exchange associated with IP address configuration mechanisms such as DHCP, SLAAC, or SEND. SAVI devices filter out packets whose source IP address does not match with an existing binding. Sun, 31 Mar 2013 22:00:00 GMT http://hdl.handle.net/10016/16994 2013-03-31T22:00:00Z http://hdl.handle.net/10016/16269 Title: An Integrated Approach to Prevent Address Spoofing in IPv6 Links Author(s): García-Martínez, Alberto; Bagnulo, Marcelo Abstract: We propose an integrated approach to protect from address spoofing for both IPv6 and Layer-2 addresses, and from address resolution attacks. The proposed approach is an extension to the FCFS SAVI specification, and relies on the inspection and generation of standard Neighbor Solicitation messages. It does not require host modification and manual configuration is only needed to indicate the ports to which routers connect. Wed, 31 Oct 2012 23:00:00 GMT http://hdl.handle.net/10016/16269 2012-10-31T23:00:00Z http://hdl.handle.net/10016/15825 Title: Performance analysis of Energy Efficient Ethernet on video streaming servers Author(s): Oliva, Antonio de la; Vargas Hernández, Tito R.; Guerri, Juan Carlos; Hernández, José Alberto; Reviriego, Pedro Abstract: Current trends on traffic growth oversee a steady increase of video streaming services, and the subsequent development of the associated infrastructure to allocate and distribute such contents. One of the operational costs associated to this infrastructure is the power bill. Therefore any mechanism used to decrease it, reducing also the carbon footprint associated to it, is welcome. In this work we investigate the suitability of the recently standardized IEEE 802.3az Energy Efficient Ethernet (EEE) for video traffic generated by video-streaming servers. The conclusion of the analysis is positive about the achievable energy savings, due to the inherent features of traffic patterns of video-streaming servers which help reducing the number of transitions between active and low-power modes in EEE. Sat, 31 Dec 2011 23:00:00 GMT http://hdl.handle.net/10016/15825 2011-12-31T23:00:00Z