# Shared Shaper Terms

Table 6 defines terms used in this discussion of shared shaping.

Table 6: Shared Shaper Terminology Used in This Chapter

Term | Description
--- | ---
Constituent | Scheduler node or queue associated with a logical interface. A shared shaper is configured for a logical interface; all queues and scheduler nodes associated with that logical interface are constituents of the shared shaper.
Active constituent | Constituent that is monitored or controlled by the shared shaper mechanism.
Inactive constituent | Constituent that is ignored by the shared shaper mechanism. Inactive constituents can be indirectly controlled; for example, queues stacked above a node that is an active constituent.
Shared Shaping | Mechanism for shaping a logical interface's aggregate traffic to a rate when the traffic for that logical interface is queued through more than one scheduler hierarchy.
Implicit shared shaper | Shared shaper where the system automatically selects the active constituents. The system selects scheduler nodes as active; queues above nodes remain inactive.
Explicit shared shaper | Shared shaper where you select the active constituents by issuing the shared-shaping-constituent command in a scheduler profile.
Compound shared shaping | Hardware-assisted mechanism that controls bandwidth for all active constituents.
Simple shared shaping | Software-assisted mechanism that measures the rate of active constituents, and shapes the rate of the best-effort node or queue to the residual shared-shaping rate.

#### Related Documentation

- For definitions of other common QoS terms, see QoS Terms