Crosslayer survivable mapping in Overlay-IP-WDM networks

Survivability is a critical requirement for reliable services in any network. As the Internet moves towards a three layer architecture consisting of Overlay on top of IP on top of WDM-based networks incorporating the interaction between and among network layers is crucial for efficient and effective implementation of survivability. This paper highlights the challenges of providing survivability in three-layer networks and develops a novel approach crosslayer survivable mapping to offer such survivability in an efficient way. We investigate the impacts of overlay network dependency on lower layer network layout in terms of the capacity allocated to overlay paths. The results demonstrate the impact due to layer dependency that it is more severe than initially anticipated making it clear that single layer network design is inadequate to assure service guarantees and efficient capacity allocation.