Description: This attribute indicates the total received frame memory size and the discard thresholds of the receive frame memory. The receive frame memory is the memory (in units of frames) used for storing frames received by this FP.

The first parameter indicates the total size of the receive frame memory. This is derived from the connectionPoolCapacity and the rxFrameMemoryAllocation under the ARC component.

When the rxFrameMemoryAvailable attribute decreases to the second value, the rxFrameMemoryCongestionState changes from 3 to 2. In congestion state 2, traffic with discard priority (DP) = 3 is discarded. This threshold is set approximately at 25 percent of the first value, the total received frame memory size.

When the rxFrameMemoryAvailable attribute decreases to the third value, the rxFrameMemoryCongestionState changes from 2 to 1. In congestion state 1, traffic with discard priority (DP) >= 2 is discarded. This threshold is set approximately at 20 percent of the first value, the total received frame memory size.

When the rxFrameMemoryAvailable attribute decreases to the fourth value, the rxFrameMemoryCongestionState changes from 1 to 0. In congestion state 0, traffic with discard priority (DP) >= 1 is discarded. This threshold is set approximately at 10 percent of the first value, the total received frame memory size.

The opposite effect occurs when the rxFrameMemoryAvailable attribute increases (rxFrameMemoryCongestionState increases from 0 to 3 accordingly).