32.6.17 MAC PFC Priority-based Pause Frame Support
Note: Refer to the 802.1Qbb standard for
a full description of priority-based pause operation.
The following table shows the start of a Priority-based Flow Control (PFC) pause frame.
| Address | Type (Mac Control Frame) | Pause Opcode | Priority Enable Vector | Pause Time | |
|---|---|---|---|---|---|
| Destination | Source | ||||
| 0x0180C2000001 | 6 bytes | 0x8808 | 0x1001 | 2 bytes | 8 × 2 bytes |
The GMAC supports PFC priority-based pause transmission and reception. Before PFC pause frames can be received, bit 16 of the Network Control register must be set (NCR.ENPBPR =1).