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IP address lookup is one of the most challenging problems of Internet routers. In this paper, an IP lookup rate of 263 Mlps (Million lookups per second) is achieved using a novel architecture on reconfigurable hardware platform. A partial reconfiguration may be needed for a small fraction of route updates. Prefixes can be added or removed at a rate of 2 million updates per second, including this hardware reconfiguration overhead. A route update may fail due to the physical resource limitations. In this case, which is rare if the architecture is properly configured initially, a full reconfiguration is needed to allocate more resources to the lookup unit.