An SNMP Based Traffic Characterisation Paradigm for Green-Aware Networks

This chapter describes a novel approach to study network patterns in a data centre with the aim of reducing power consumed. Cloud infrastructures rely on numerous networked devices in data-centers to provide virtualization and sharing of resources. Network traffic is one of the key contributors to power consumption. Numerous techniques to develop power-aware data-centers have been proposed in the recent years. Virtualization management is based on many critical decisions including work-load, utilization, location of physical resources etc. This chapter takes a unique network management angle to greening a data center. It describes how Simple Network Management Protocol (SNMP) has a great potential to characterize traffic which can then feed into decisions for management of virtualized entities.

Burst-Switched Optical Networks Supporting Legacy and Future Service Types

Focusing on the principles and the paradigm of OBS an overview addressing expectable performance and application issues is presented. Proposals on OBS were published over a decade and the presented techniques spread into many directions. The paper comprises discussions of several challenges that OBS meets, in order to compile the big picture. The OBS principle is presented unrestricted to individual proposals and trends. Merits are openly discussed, considering basic teletraffic theory and common traffic characterisation. A more generic OBS paradigm than usual is impartially discussed and found capable to overcome shortcomings of recent proposals. In conclusion, an OBS that offers different connection types may support most client demands within a sole optical network layer.