Current scientific data applications require advanced network provisioning systems to support the transport of large volumes of data. Due to the availability of diverse\ud computing and Grid clusters, these applications can benefit from anycasting capabilities. In contrast to unicasting, anycast routing allows the selection of a node from a group of candidate destinations. This new means of communication allows for greater routing flexibility and better network resource consumption.\ud However, current provisioning systems do not provide fully compliant anycast implementations. In this paper, we extend\ud ESnet’s OSCARS virtual circuit provisioning system with anycast routing capabilities to support destination-agnostic applications\ud on single- and multi-domain network scenarios. The proposed implementation significantly improves provisioning success over the native unicast implementation in compliance with the existing OSCARS framework.Peer ReviewedPostprint (author’s final draft

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In this paper we investigate the problem of provisioning dynamic anycast holding-time-aware (HTA) lightpaths in all-optical wavelength division multiplexed (WDM) networks. We employ a technique called lightpath switching (LPS) wherein the data transmission may begin on one lightpath and switch to a different lightpath at a later time. We propose two heuristics to solve the anycast routing and wavelength assignment (RWA) problem: anycast with continuous segment (ACS) and anycast with lightpath switching (ALPS). We first compare the performance of ACS to ALPS and observe that ALPS achieves better blocking than ACS. Furthermore, we also compare the performance of these two anycast RWA algorithms to the traditional unicast RWA algorithm. We show that the anycast RWA algorithms presented here significantly out-perform the traditional unicast RWA algorithms.