The TPMR frames discard details table. Each row in the table represents a discarded frame on a TPMR port. By definition there are two ports per TPMR. This table is maintained as a FIFO. A new entry is inserted in the first row, and existing entries are shuffled down, with the last entry being discarded. Because of the FIFO behavior, the relationship between the index and contents will change when an entry is added to the table. This may result in apparent duplication of row content during a table traversal.