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

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

When the txFrameMemoryAvailable attribute decreases to the second value, the txFrameMemoryCongestionState 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 transmit frame memory size.

When the txFrameMemoryAvailable attribute decreases to the third value, the txFrameMemoryCongestionState 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 transmit frame memory size.

When the txFrameMemoryAvailable attribute decreases to the fourth value, the txFrameMemoryCongestionState 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 transmit frame memory size.

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