Computer Science – Networking and Internet Architecture
Scientific paper
2012-04-11
International Journal of Computer Networks & Communications (IJCNC) Vol.4, No.2, March 2012 17-34
Computer Science
Networking and Internet Architecture
18 pages
Scientific paper
10.5121/ijcnc.2012.4202
A reliable network infrastructure must be able to sustain traffic flows, even when a failure occurs and changes the network topology. During the occurrence of a failure, routing protocols, like OSPF, take from hundreds of milliseconds to various seconds in order to converge. During this convergence period, packets might traverse a longer path or even a loop. An even worse transient behaviour is that packets are dropped even though destinations are reachable. In this context, this paper describes a proactive fast rerouting approach, named Fast Emergency Paths Schema (FEP-S), to overcome problems originating from transient link failures in OSPF routing. Extensive experiments were done using several network topologies with different dimensionality degrees. Results show that the recovery paths, obtained by FEPS, are shorter than those from other rerouting approaches and can improve the network reliability by reducing the packet loss rate during the routing protocols convergence caused by a failure.
Luiz Nacamura Jr.
Barreto Fernando
Wille Emilio C. G.
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