This object identifies which type of consistency checker generated a particular inconsistency record. Since different checker types validate different aspects of FIB correctness, knowing which one flagged the issue tells the admin what kind of problem to expect, such as a checksum-focused checker versus one comparing route presence against the RIB. If two different inconsistency records both point to the same checker type, that pattern, rather than isolated one-off flags, suggests a systemic issue with whatever that checker validates, not random noise.