1. A method of configuring a network, the method comprising the steps of: performing network management optimizations at respective points in time separated by intervals of a first time scale; performing network provisioning optimizations at respective points in time separated by intervals of a second time scale, the intervals of the second time scale being on average substantially longer than the intervals of the first time scale; and configuring the network utilizing information specified by the network management and network provisioning optimizations; wherein a given one of the intervals of the second time scale has a length which is determined based on results of performance of one or more of the network management optimizations; and wherein the steps of performing network management optimizations, performing network provisioning optimizations and configuring the network are implemented under control of a network device comprising a processor coupled to a memory.