Article ID: 000084028 Content Type: Troubleshooting Last Reviewed: 11/30/2015

LL 40GBASE-KR4 IP Cores with Both Auto-Negotiation and Link Training Turned Off Are Non-Functional

Environment

  • Intel® Quartus® Prime Pro Edition
  • Ethernet
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT

    Critical Issue

    Description

    When you parameterize a 40GBASE-KR4 variation of the LL 40GbE IP core, you must turn on at least one of auto-negotiation (AN) and Link Training (LT). Variations with neither of these features turned on might be non-functional. They might fail to lock to incoming 40GbE data, or might show a high packet error rate. This issue is seen in configurations with and without forward error correction (FEC) enabled.

    Resolution

    This issue has no workaround.

    This issue will be fixed in a future version of the Low Latency 40- and 100-Gbps Ethernet MAC and PHY IP core.

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