Article ID: 000085431 Content Type: Troubleshooting Last Reviewed: 06/30/2014

Unable to Successfully Trigger XON in Low Latency Ethernet 10G MAC

Environment

  • Quartus® II Subscription Edition
  • Ethernet
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT

    Critical Issue

    Description

    The Low Latency Ethernet 10G MAC MegaCore function cannot handle back-to-back triggering of XOFF/XON.

    This issue affects all versions that support Low Latency Ethernet 10G MAC.

    Resolution

    After you assert the avalon_st_pause_data[1] signal to 1 (trigger XOFF), wait for at least three clock cycles before asserting the avalon_st_pause_data[0] to 1 (trigger XON).

    This issue will be fixed in a future version of the Low Latency Ethernet 10G MAC.

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