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Abstract

A technique for updating a content addressable memory is disclosed. In one exemplary embodiment, wherein the content addressable memory has a plurality of entries, and wherein each of the plurality of entries has a prefix field, a prefix length field, and an associated index identifier, the technique is realized by determining a first index identifier associated with a first of the plurality of entries, wherein the first entry has a first prefix with a first prefix length that is greater than a third prefix length of a third prefix to be added to the content addressable memory. A second index identifier associated with a second of the plurality of entries is also determined, wherein the second entry has a second prefix with a second prefix length that is less than the third prefix length of the third prefix to be added to the content addressable memory. Based upon the first index identifier and the second index identifier, a third index identifier is determined. The third index identifier is associated with a third of the plurality of entries where the third prefix with the third prefix length may be added to the content addressable memory. The third index identifier is located at one of or between the first index identifier and the second index identifier.

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First Claim