The 100G Ethernet subsystem is capable of handling 802.3x and priority-based pause operation. The RX path parses pause packets and presents the extracted quanta on the status interface; the TX path can accept pause packet requests from the control interface and will inject the requested packets into the data stream. Both global pause packets and priority-based pause packets are handled. Details are described in Pause Processing Interface .
Note: “802.3x” and “global pause” are used interchangeably throughout the document.