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Zach2's avatar
Zach2
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3 years ago

Arria 10 HPS EMAC with KSZ9131 PHY

We've developed a custom Arria 10 SX board that pairs a KSZ9131 Ethernet PHY with the HPS EMAC, and using Linux 5.4 we see inconsistent Ethernet behavior depending on whether the link has gone down: ...
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ZiYing_Intel's avatar
ZiYing_Intel
Icon for Frequent Contributor rankFrequent Contributor
3 years ago

Hi,


  • Subsequently, if the link goes down and then comes back up (either because the cable was unplugged or by using ifdown/ifup), we can't ping to or from the Arria 10.


For this statement, just wonder that are you running external loopback under the condition cable was unplugged?


Best regards,

Zi Ying


  • Zach2's avatar
    Zach2
    Icon for New Contributor rankNew Contributor
    3 years ago

    Hello,

    We weren't using any loopback modes. The only actual traffic we were testing was pings.

    Regarding your previous question, we're using the Synopsys DesignWare hard IP block for the MAC.

    Thanks,

    Zach