Virtex 4 ThE链路速度协商

你好，
我正在组建一个在Memec 4VFX12LC评估板上使用V4FX硬TEMAC的项目，从一个EDK参考设计（使用lwIP的echo服务器）开始。
有时一切都有效，但通常（90％的时间），随着软件启动，GbEfails上的链接速度协商。
在评估板上，链路显示为GbE，半双工，但不起作用。
有一段时间，它出现了GbE全双工，然后一切正常。
奇怪的是，每当我在电路板上进行硬复位时，链路总是最初以GbE全双工的形式出现。
只有在软件启动过程中才能重新协商，并且搞砸了。
但我没有看到任何处理链接速度协商的软件指令。
有谁知道在哪里看，解决这个问题？
谢谢你的帮助，
- 直到Rosenband
Ion Storage Group，time＆amp;
频分
美国商务部/ NIST
325百老汇
Bouldewr，CO 80305



以下为原文

Hello,I'm putting together a project that uses the V4FX hard TEMAC on the Memec 4VFX12LC eval board, starting from one of the EDK reference designs (echo server using lwIP).  Sometimes everything works, but often (90% of the time), as the software boots up, link-speed negotiation on the GbE fails.  On the eval board, the link comes up as GbE, half-duplex, which doesn't work.  Once in a while, it comes up as GbE full-duplex, and then everything works fine. Curiously, whenever I do a hard reset on the board, the link always comes up initially as GbE full-duplex.  It's only during the software-startup process that this gets re-negotiated, and messed up.  But I don't see any software instructions that deal with link-speed negotation. Does anyone know where to look, to fix this problem? Thanks for you help,-Till RosenbandIon Storage Group, Time & Frequency DivisionU.S. Department of Commerce / NIST325 BroadwayBouldewr, CO 80305