Service Level Agreement Framework for Differentiated Survivability in GMPLS-based IP-over-Optical Networks

Abstract

In the next generation optical internet, GMPLSbased IP-over-optical networks, ISPs will be required to support a wide variety of applications each having their own requirements. These requirements are contracted by means of the SLA. This paper describes a recovery framework that may be included in the SLA contract between ISP and customers in order to provide the required level of survivability. A key concern with such a recovery framework is how to present the different survivability alternatives including recovery techniques, failure scenario and layered integration into a transparent manner for customers. In this paper, two issues are investigated. First, the performance of the recovery framework when applying a proposed mapping procedure as an admission control mechanism in the edge router considering a smart-edge simple-core GMPLS-based IP/WDM network is considered. The second issue pertains to the performance of a pre-allocated restoration and its ability to provide protected connections under different failure scenarios.Index Terms-Multi-layer survivability, quality of restoration, recovery mechanisms.

Restoration in Optical Cloud Networks With Relocation and Services Differentiation

“…For example, critical applications (e.g., transactional systems, security applications, infrastructure as a service) may require service availability levels close to 99.999%, while less critical cloud services (e.g., multimedia offline processing, preemptible virtual machines), may be provisioned with less stringent availability figures (i.e., between four or three 9s). Normally these requirements are specified in the Service Level Agreement (SLA) [9], [10].…”