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1. About the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide
2. Low Latency Ethernet 10G MAC Intel® FPGA IP Overview
3. Getting Started
4. Functional Description
5. Low Latency Ethernet 10G MAC Intel® FPGA IP Parameters
6. Interface Signals
7. Configuration Registers
8. Document Revision History for the F-Tile Low Latency Ethernet 10G MAC Intel® FPGA IP User Guide
3.1. Introduction to Intel® FPGA IP Cores
3.2. Installing and Licensing Intel® FPGA IP Cores
3.3. Specifying the IP Core Parameters and Options ( Intel® Quartus® Prime Pro Edition)
3.4. Generated File Structure
3.5. Simulating Intel® FPGA IP Cores
3.6. Upgrading the Low Latency Ethernet 10G MAC Intel® FPGA IP Core
3.7. Low Latency Ethernet 10G MAC Intel® FPGA IP Design Examples
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4.5.4. Frame Type Checking
The MAC RX checks the length/type field to determine the frame type:
- Length/type < 0x600—The field represents the payload length of a basic Ethernet frame. The MAC RX continues to check the frame and payload lengths.
- Length/type >= 0x600—The field represents the frame type.
- Length/type = 0x8100, 88A8, 88F5, 9100, 9200 —VLAN or stacked VLAN tagged frames (up to a total of two tags). The MAC RX continues to check the frame and payload lengths.
- Length/type = 0x8808—Control frames. The next two bytes are the Opcode field which indicates the type of control frame. For pause frames (Opcode = 0x0001), the MAC RX proceeds with pause frame processing. By default, the MAC RX drops all control frames. If configured otherwise (FWD_CONTROL bit in the rx_frame_control register = 1), the MAC RX forwards control frames to the client.
- For other field values, the MAC RX forwards the receive frame to the client.
Category | Packet Size | Length/Type = Payload | Length/Type > Payload | Length/Type < Payload | MAC Behavior | |
---|---|---|---|---|---|---|
Frame Drop | avalon_st_rx_error[] | |||||
Normal packet | 64–1518 | Yes | No | No | No | — |
No | No | Yes | No | |||
No | Yes | No | No | avalon_st_rx_error[4] = 1 |
||
Undersized | Packet < 64 | Yes | No | No | No | avalon_st_rx_error[2] = 1 |
No | No | Yes | No | |||
No | Yes | No | No | avalon_st_rx_error[2] = 1 avalon_st_rx_error[4] = 1 |
||
Oversized | 1518 < Packet < 1535 | Yes | No | No | No | avalon_st_rx_error[3] = 1 |
No | No | Yes | No | |||
No | Yes | No | No | avalon_st_rx_error[3] = 1 avalon_st_rx_error[4] = 1 |