Invention Grant
US09275336B2 Method and system for skipping over group(s) of rules based on skip group rule 有权
基于跳过组规则跳过规则组的方法和系统

Method and system for skipping over group(s) of rules based on skip group rule
Abstract:
A method and corresponding system for providing a skip group rule feature is disclosed. When a search for a key matches a skip group rule in a group of prioritized rules, the search skips over rules having priorities lower than the skip group rule and the search continues to a next group. A convenient example of a compiler rewrites the lower priority rules by subtracting the skip group rule from them. The subtraction includes subtracting range, exact-match, mask, and prefix fields. The rewritten rules appear to a search processor as typical rules. Beneficially, the search processor requires no additional logic to process a skip group rule, skip over lower priority rules, and go on to search a next group of rules. Advantageously, this approach enables any number of skip group rules to be defined allowing for better classification of network data.
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