A method of forming contact holes. The frame has a bottom channel with a slot traversing its length in which the wiper element is maintained. 0% by weight rare earth element, 0. Alternatively, a partitioning algorithm segments a routing trie into partitions, and then, either a separate, small TCAM or one of the partitions is used in the first stage to map a prefix of the destination address to one of the TCAM partitions for use in the second stage.