The Ethernet subsystem of the Keystone I series chips (C6670, C6671, C6672, C6674, C6678, TCI6614) can be divided into three functional entities: internal switch (SGMII Serdes/SGMII/EMAC/CPSW), PA (packet accelerator), and SA (security accelerator). This subsystem is relatively complex because it contains many submodules. The content organization of the four related user manuals is not very easy to understand, and many users have encountered some technical difficulties during the development process. This manual summarizes some typical technical problems encountered in actual applications and debugging methods for various problems. It also provides various practical configurations and suggestions for the Ethernet subsystem. For users with basic Keystone I Ethernet knowledge, this manual can serve as a powerful supplement to the user manual. It is expected that readers will refer to this article after reading the user guide and having basic PA LLD/SA LLD development experience.
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