2 Troubleshooting the PHY Application

The following sections approach the debug from a high level, attempting to start with application characteristics that have a broad impact and then zero in on a more focused aspects of the design.

This document is intended to address common Ethernet issues such as:

• Cannot access registers
• Cannot get link OR intermittent linkup
• Linkup but seeing packet errors
• Inability to ping

TI recommends going through the following sections in order unless otherwise specified.