With increasing demands on storage devices in the modern communication environment, the storage area network (SAN) has evolved to provide a direct connection allowing these storage devices to be accessed efficiently. To optimize the performance of a SAN, a three-stage hybrid electronic/optical switching node architecture based on the concept of a MPLS label switching mechanism, aimed at serving as a multi-protocol label switching (MPLS) ingress label edge router (LER) for a SAN-enabled application, has been designed. New shutter-based free-space multi-channel optical switching cores are employed as the core switch fabric to solve the packet contention and switching path conflict problems. The system-level node architecture design constraints are evaluated through self-similar traffic sourced from real gigabit Ethernet network traces and storage systems. The extension performance of a SAN over a proposed WDM ring network, aimed at serving as an MPLS-enabled transport network, is also presented and demonstrated.
© 2012 OSA
Original Manuscript: May 7, 2012
Revised Manuscript: May 7, 2012
Manuscript Accepted: May 21, 2012
Published: June 8, 2012
Hsi-Hsir Chou, B. Pranggono, T. D. Wilkinson, F. Zhang, W. A. Crossland, and J. M. H. Elmirghani, "Free-Space Optoelectronic Switching Cores With MPLS for SANs Over WDM Ring Networks," J. Opt. Commun. Netw. 4, 533-545 (2012)