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AR# 35261

LogiCORE IP 10-Gigabit Ethernet MAC v9.3 and earlier - VLAN frame misclassified after pause frame


The flow control block inhibits VLAN mode in the transmitter when it is sending a flow control frame. If a VLAN frame is transmitted directly following a flow control frame, it is possible for the VLAN mode to be incorrectly disabled. This can result in the VLAN frame not be counted as a VLAN frame in the statistics. This could also cause the frame to be truncated if it is between 1518 and 1522 bytes in length and Jumbo frames are not enabled.


This issue has been fixed in the 10-Gigabit Ethernet MAC v10.1 and later available starting in ISE 12.1 software.

Linked Answer Records

Master Answer Records

AR# 35261
Date 05/23/2014
Status Archive
Type General Article
  • Virtex-5 LXT
  • Virtex-5 SXT
  • Virtex-5 TXT
  • More
  • Virtex-5 FXT
  • Virtex-6 HXT
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Virtex-4 FX
  • Less
  • ISE Design Suite - 11.3
  • 10 Gigabit Ethernet Media Access Controller
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