This article presents analysis and possible reactions of MPLS network on unauthorized access and on device’s failure. Five Cisco routers joined into a core network were used to conduct the project. The devices were connected into a classic reliability model with envelope shape. The key aspects of the research were incidents’ simulation in line with previously prepared scenarios as well as diagnosis of network’s reactions to a particular type of a device failure. These effects were modelled using special devices such as analysers and generators of data traffic. Additionally, the range of the project included measuring convergence time of the routing protocols acting inside the network combined with analysis of reactions to forced changes of route.
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