Intel® Stratix® 10 Hard Processor System Technical Reference Manual

ID 683222
Date 1/25/2024
Public
Document Table of Contents

17.6.8.3.5. Layer 3 Filtering

The EMAC supports perfect matching or inverse matching for the IP Source Address and Destination Address. In addition, you can match the complete IP address or mask the lower bits.

For IPv6 frames filtering, you can enable the last four data registers of a register set to contain the 128-bit IP Source Address or IP Destination Address. The IP Source or Destination Address should be programmed in the order defined in the IPv6 specification. The specification requires that you program the first byte of the received frame IP Source or Destination Address in the higher byte of the register. Subsequent registers should follow the same order.

For IPv4 frames filtering, you can enable the second and third data registers of a register set to contain the 32-bit IP Source Address and IP Destination Address. The remaining two data registers are reserved. The IP Source and Destination Address should be programmed in the order defined in the IPv4 specification. The specification requires that you program the first byte of received frame IP Source and Destination Address in the higher byte of the respective register.