An important drawback of the existing models of fault-tolerant routing at this stage of the technology is the lack of a rapid response to network congestion. Most routing protocols provide re-route with a period of tens of seconds, which is unacceptable in today's dynamic network. In this paper a study resources that provides fault tolerance Advanced routing networks SDN. A mathematical model of fault-tolerant routing that counts just two ways: main and reserve.
mathematical model, fault-tolerant routing, Fast ReRoute, protection unit, channel protection, the protection route, SDN