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AM62A7-Q1: ethernet failes after a long time

haijun
Intellectual 525 points
Part Number: AM62A7-Q1
Other Parts Discussed in Thread: AM62A7

Tool/software:

Hello,

I am currently working on the AM62A7 platform (SDK 09.02) and encountering an unusual networking issue. Here are the details:

  1. Setup:

    • Direct Ethernet connection between my AM62A7 board and a PC (no intermediate switches).
    • Continuous bidirectional ping tests to monitor connectivity.

  2. Problem:

    • After approximately 24 hours, both devices lose connectivity—ping fails in both directions.
    • The issue resolves immediately when I enable promiscuous mode (ifconfig eth0 promisc) on the AM62A7 network interface, restoring full bidirectional ping functionality.
    • Disabling promiscuous mode (ifconfig eth0 -promisc) causes the connectivity to fail again.

  3. Observations:

    • No obvious errors in kernel logs or network stack traces during failure.
    • The problem persists across reboots but is consistently resolved by promiscuous mode

Could you provide insights into what might cause this behavior?