5 October 2000 Routing and switching in optical networks: comparing the benefits of hybrid vs. router-only solutions
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Abstract
The public network is rapidly moving from being a voice-optimized network that carries data, to a data-optimized network that will carry multiple services with IP as the predominant traffic. One of the key issues confronting carriers is the balance between circuit switching and packet switching in the core of the network. With the emergence of fast IP switch/routers, it is becoming possible to directly connect all ports on DWDM equipment directly on the router vs. connecting the router to DWDM infrastructure through an optical cross-connect. Comparing the costs of circuit switching and packet switching in the core of the network, a hybrid of packet and circuit switching solution proves more cost-effective than the pure packet switching whenever the port cost of the IP router is more than twice the port cost of the optical cross- connect. Furthermore, to enable cost effective evolution toward the converged network, the next generation of switching equipment will need to accommodate astronomical growth, while providing carriers with more flexibility in network design.
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Peter Chadwick, Peter Chadwick, Yassi Moghaddam, Yassi Moghaddam, } "Routing and switching in optical networks: comparing the benefits of hybrid vs. router-only solutions", Proc. SPIE 4213, Terabit Optical Networking: Architecture, Control, and Management Issues, (5 October 2000); doi: 10.1117/12.402551; https://doi.org/10.1117/12.402551
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