User Externs

Simplify Packet Processing Design with P4 and Vivado Tools (WP555)

Document ID
WP555
Release Date
2024-01-24
Revision
1.0 English

User externs provide an interface between the match-action control block and your own RTL module that resides outside of the VNP4. You can implement whatever function is useful for your design, such as a custom checksum calculation or a hash function.