This object specifies the lower 32 bits of the Excess Information Rate (EIR) for QoS traffic shaping on a port in a Ciena metro ethernet device. The EIR defines the maximum rate at which traffic exceeding the committed rate can be forwarded; combined with the upper 32 bits, it represents a 64-bit value. Operators set this to implement tiered bandwidth policies where traffic above the committed rate is allowed but at a lower priority or may be discarded under congestion.