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When a link or router failure occurs in a routed network, there is unpredictable period of network traffic interruption. This problem persists until network reconverges on the new topology. New technology which solves these problems after link or router failure has been developed - IP Fast Reroute (IPFRR).
Live Virtual machine (VM) migration is a promising solution for data center (DC) administrators to achieve a wide range of objectives - from load balancing to disaster evacuation. Ideally, live VM migration is seamless and the challenge is to minimize the downtime during which the VM is not responding to requests or providing the service. The duration of the downtime is mainly influenced by the migration...
The aim of this research is to enhance the performance of the Fast Re-Route (FRR) mechanism by adopting a methodology similar in many aspects to that used in Software Defined Networking (SDN). This methodology is represented by using a central controller to calculate the paths of backup MPLS tunnels that are used to protect previously established primary MPLS tunnels, and a messaging system to install...
The IPFRR technology provides fast network recovery after a link or router failure within an ISP network. During the link or the router failure within network, there is unpredictable period of time when part of communication is lost until the process of network convergence will complete. During this process specific networks may become unavailable and problems with critical applications and services,...
Up to not so long ago, Loop-Free Alternates (LFA) was the only viable option for providing fast protection in pure IP and MPLS/LDP networks. Unfortunately, LFA cannot provide protection for all possible failure cases in general. Recently, the IETF has initiated the Remote Loop-Free Alternates (rLFA) technique, as a simple extension to LFA, to boost the fraction of failure cases covered by fast protection...
The selection strategy of overlay link directly affects the performance of overlay network routing, and another important factor that can affect the performance of overlay network is that the overlay link has an exorbitant level of reuse with the physical link, but they are not much considered in previous studies. Taking full account of various factors that can affect the performance of overlay network...
The maintenance of communication systems is a critical operation which monopolizes human and network resources. The management of multiple, parallel maintenance jobs is a complex task that can generate faults and undesirable service interruption. In the context of IP/MPLS networks, Graceful Restart mechanisms allow, under strict conditions, the maintenance of a single router without impacting its...
In this paper, we propose a routing technique, “recursive Loop-Free Alternates (rLFAs)”, to alleviate packet loss due to transient link failures. The technique consists of a backup path calculation with corresponding re-routing scheme based on the Loop-Free Condition (LFC) as defined in the basic specification for IP Fast Re-Route (IPFRR). Under this routing strategy, nodes calculate backup paths...
This paper presents an inter-FE topology discovery technology on ForCES router, it introduced a new type of topology discovery protocol ITDP (Inter-FE Topology Discovery Protocol). ITDP broadcast the prescribed format of the ITDP packets to each ITDP protocol port when FE is initialized, adjacent FE put these information into a neighbor table after the receipt of ITDP message packet, constructed FE...
We present an efficient multi-plane based fast network failure recovery scheme which can be realized using the recently proposed multi-path enabled BGP platforms. We mainly focus on the recovery scheme that takes into account BGP routing disruption avoidance at network boundaries, which can be caused by intra-AS failures due to the hot potato routing effect. On top of this scheme, an intelligent IP...
Overlay networks enable applications to communicate with users without disclosing their IP addresses; hence overlay networks are used to protect applications against DoS attacks by hiding an applicationpsilas location. This paper analyzes three popular overlay networks (Chord, CAN, and Pastry) by simulation to answer to this question: which topology is more favorable for location-hiding and resisting...
Due to vast use of network centric environments in critical applications, reliability and availability are the essential characteristics of these networks. A fundamental requirement is the ability to keep the relation between the network elements even in any malfunctions in network topology. Rerouting is a suitable response to this issue. In this paper, we consider several retrieval and rerouting...
A fast loss recovery scheme for IP multicast services is presented in this paper. In this scheme, the head field of retransmission request packets contains the one-way delay between the requestor and the sender of the lost packet, and the head field of repair packets contains the one-way delay between the repairer and the requestor. Each member in the multicast group compares its own one-way delay...
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