SPRADJ8 October   2024 AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3359 , AM4372 , AM4376 , AM4377 , AM4378 , AM4379 , AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM62A1-Q1 , AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62P , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442 , DP83822H , DP83822HF , DP83822I , DP83822IF , DP83826E , DP83826I , DP83848-EP , DP83848Q-Q1 , DP83867CR , DP83867CS , DP83867E , DP83867IR , DP83867IS , DP83TC812R-Q1 , DP83TC812S-Q1 , DP83TC813R-Q1 , DP83TC813S-Q1 , DP83TC814R-Q1 , DP83TC814S-Q1 , DP83TG720R-Q1 , DP83TG720S-Q1 , DP83TG721R-Q1 , DP83TG721S-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Terminology
  5. 2 Prerequisites
  6. 3 Quick Initial Steps
  7. 4 Debug Overview
  8. 5 Network Driver Initialization Process
  9. 6 Ethernet PHY Analysis
  10. 7 Ethernet MAC Statistics Analysis
  11. 8 How IPv4 Address is Obtained
  12. 9 Follow the Packet
  13. 10Debug Network Topologies and Techniques
    1. 10.1 Direct Connection
    2. 10.2 Static IP Addresses
    3. 10.3 Setting Low Bit Rates
    4. 10.4 Beware When Connecting to a Switch
  14. 11Linux® Utilities Summary
  15. 12Checklist for Requesting Ethernet Support

10.1 Direct Connection

The simplest topology is to directly connect two link partners together without a switch or WLAN router. A direct connection example is between the DUT and a known good test platform such as an Ubuntu Linux PC. Figure 10-1 shows a direct connection where there is not a switch or WLAN router connecting the two link partners.

Connecting the two link partners generates traffic without further action because both platforms send out broadcast packets in an attempt to acquire an IP address.

AM62x, AM64x, AM62Ax, AM62P Direct Connection Topology Figure 10-1 Direct Connection Topology