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— Buffered crossbars have been considered as an alternative for non-buffered crossbars to improve switching throughput. The drawback of a buffered crossbar is the memory amount that is proportional to the square of the number of ports (O(N 2)). This is not the main limitation when the buffer size is kept to a minimum size such that implementation is(More)
Invited Paper As the broadband access technologies, such as DSL, cable modem, and gigabit Ethernet, are providing affordable broadband solutions to the Internet from home and the enterprise, it is required to build next generation routers with high-speed interfaces (e.g., 10 or 40 Gb/s) and large switching capacity (e.g., multipetabit). This paper first(More)
Two centralized arbitration schemes are proposed for a large-capacity optical ATM switch: the dual round-robin matching (DRRM) scheme and the centralized multicast contention resolution (CMCR) scheme. The DRRM scheme is similar to the iSLIP scheme 1], but is simpler and faster. The DRRM scheme can only handle unicast cells, while the CMCR scheme can handle(More)
3.1 INTRODUCTION Traditionally, Internet routers only provide best effort service by processing each incoming packet in the same manner. With the emergence of new applications, Internet Service Providers (ISPs) would like routers to provide different QoS levels to different applications. To meet these QoS requirements, routers need to implement new(More)
— Virtual Output Queuing is widely used by fixed-length high-speed switches to overcome head-of-line blocking. This is done by means of matching algorithms. Maximum matching algorithms have good performance , but their implementation complexity is quite high. Maximal matching algorithms need speedup to guarantee good performance. Iterative algorithms (such(More)
A Clos-network switch architecture is attractive because of its scalability. Previously proposed implementable dispatching schemes from the first stage to the second stage, such as random dispatching (RD), are not able to achieve high throughput unless the internal bandwidth is expanded. This paper presents two round-robin-based dispatching schemes to(More)
— Input-buffered switches have been widely considered for implementing feasible packet switches. However, their matching process may not be time efficient for switches with high-speed ports. Buffered crossbars are an alternative to relax timing for packet switches with high-speed ports and to provide high-performance switching. Buffered crossbar switches(More)
—It is becoming apparent that the next generation IP route lookup architecture needs to achieve speeds of 100-Gbps and beyond while supporting both IPv4 and IPv6 with fast real-time updates to accommodate ever-growing routing tables. Some of the proposed multibit-trie based schemes, such as Tree Bitmap [1], have been used in today's high-end routers.(More)