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When a link or node fails, flows are detoured around the failed portion, so the hop count of flows and the link load could change dramatically as a result of the failure. As real-time traffic such as video or voice increases on the Internet, ISPs are required to provide stable quality as well as connectivity at failures. For ISPs, how to effectively improve the stability of these qualities at failures...
In the maintenance of communication networks, nodes often need to be rebooted or brought off line for software updates, configuration updates or hardware maintenance. ISPs often run the same protocols and use equipment from the same vendor network-wide, increasing the probability that a maintenance window will be network wide. Some of the updates can be critical where we have to update fast, for example,...
P2P applications attract a lot of users and generate the dominant portion of the overall traffic in the Internet today. On the one hand, this large amount of traffic results in high operational costs for ISPs, mainly because of expensive interdomain connections. On the other hand, the performance of P2P applications is constricted by suboptimal peer selection or by bandwidth limitations of ISPs. To...
Internet Service Providers (ISPs) run the internal flavor of the Border Gateway Protocol (iBGP) for distributing routing information among border routers. While configuration languages allow routers to change iBGP attributes as a BGP message travels within the ISP's network, most prior work neglected this possibility, focusing only on the common case where iBGP attributes are left untouched. In this...
P2P application has accounted a large proportion of the total Internet traffic. However, existing P2P topology formation protocols always assume a homogeneous environment or neglect the underlying Internet topology. These methods will increase inter-domain traffic so that ISPs always restrict the P2P traffic and current neighbor selection procedure always randomly chooses a peer as its neighbor probably...
The random nature of unstructured P2P overlays imbues them with enhanced self-* properties. Most of the algorithms which make searching in unstructured P2P systems scalable, such as dynamic querying and 1-hop replication, rely on the random nature of the overlay to function efficiently. However, they do not take into account the structure of the underlying physical communications network, which is...
Peer-to-peer (P2P) technologies rapidly attracted people and had a big success for file sharing applications as well as for other kinds of applications such as voice and now video streaming applications. But this success has also an impact on the physical networks, which become more loaded and could lead to a point where the quality of P2P services may decrease. Therefore it is necessary to study...
Overlay applications are generating most of the traffic in today's Internet. Therefore, the impact of the increasing P2P traffic on ISP's Capital and Operational Expenditures (CAPEX/OPEX) is one of its major concerns. In this paper, an overview of ISP methods for P2P traffic management is provided. The ISP has to consider the optimization of this traffic and its associated operational costs. Therefore,...
Power consumption of ICT is becoming more and more a sensible problem, which is of interest for both the research community, for ISPs and for the general public. In this paper we consider a real IP backbone network and a real traffic profile. We evaluate the energy cost of running it, and, speculating on the possibility of selectively turning off spare devices whose capacity is not required to transport...
When a link or node fails, flows are detoured around the failed portion, so the hop count of flows and the link load could change dramatically as a result of the failure. As real-time traffic such as video or voice increases on the Internet, ISPs are required to provide stable quality as well as connectivity at failures. For ISPs, how to effectively improve the stability of these qualities at failures...
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