This read-create Integer32 (1..8) identifies a version-2 QoS shaper instance by its Class of Service level, where, per the description, index 1 represents COS 0, index 2 represents COS 1, and so on. An administrator uses this index to select which of up to eight per-COS shapers on a port is being configured. For example, to shape the highest-priority traffic class (COS 7), the administrator would work with the shaper entry at index 8.