A method for determining the validity of an n-dimensional policy table in a router. The router may include a processor, a memory (e.g. ROM, flash memory, non-volatile memory, hard disk, etc.), and two or more policy rules stored in the memory. Each policy rule may have one or more dimensions (or parameters), designated generally by the symbol n. In accord with the method, the processor may make a determination whether any particular policy rule in the table intersects any subsequent policy rule in the table in every dimension n. If no rules in the table intersect in every dimension n, then the policy table is valid, and the router may operate normally.