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版主及各们网友好： 有个现象困扰好多天了，特请教，请帮忙分析。 我们最近在用FETMX6ULC-V1.1核心板做产品，发现一个现象：网口eth0正常，但网口1（eth1）不正常，具体表现如下： 1. eth1必须插拔一下网线，才会检测有到有网络（RJ45的灯亮起）。 2. 在eth1上用SSH当控制台运行应用程序、观察程序打印输出信息的过程中eth1会莫名地断掉，此时SSH没有信息输出了，但控制台串口有如下信息打印输出： root@freescale /opt$[29556.290008] libphy: 20b4000.ethernet:02 - Link is Down [29556.295293] imx-uart 21e8000.serial: Rx FIFO overrun [29556.300366] imx-uart 21e8000.serial: Rx FIFO overrun [29556.305478] imx-uart 21ec000.serial: Rx FIFO overrun [29610.310521] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29610.316501] imx-uart 21ec000.serial: Rx FIFO overrun [29612.319969] libphy: 20b4000.ethernet:02 - Link is Down [29619.320270] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29621.319968] libphy: 20b4000.ethernet:02 - Link is Down [29621.325253] imx-uart 21e8000.serial: Rx FIFO overrun [29621.330388] imx-uart 21f4000.serial: Rx FIFO overrun [29621.335450] imx-uart 21e8000.serial: Rx FIFO overrun [29621.340551] imx-uart 21f4000.serial: Rx FIFO overrun [29643.340402] libphy: 20b4000.ethernet:02 - Link is Up - 100/Full [29661.340020] libphy: 20b4000.ethernet:02 - Link is Down [29667.340307] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29669.339991] libphy: 20b4000.ethernet:02 - Link is Down [29669.345282] imx-uart 21e8000.serial: Rx FIFO overrun [29669.350406] imx-uart 21f4000.serial: Rx FIFO overrun [29669.355471] imx-uart 21e8000.serial: Rx FIFO overrun [29669.360573] imx-uart 21f4000.serial: Rx FIFO overrun [29678.360297] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29678.366278] imx-uart 21ec000.serial: Rx FIFO overrun [29678.371353] imx-uart 21ec000.serial: Rx FIFO overrun [29680.370086] libphy: 20b4000.ethernet:02 - Link is Down [29695.370322] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29697.370021] libphy: 20b4000.ethernet:02 - Link is Down [29697.375306] imx-uart 21e8000.serial: Rx FIFO overrun [29697.380380] imx-uart 21f4000.serial: Rx FIFO overrun [29710.380309] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29710.386286] imx-uart 21e8000.serial: Rx FIFO overrun [29710.391358] imx-uart 21f4000.serial: Rx FIFO overrun [29712.389955] libphy: 20b4000.ethernet:02 - Link is Down [29715.390352] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29715.396328] imx-uart 21e8000.serial: Rx FIFO overrun [29715.401441] imx-uart 21f4000.serial: Rx FIFO overrun [29715.406504] imx-uart 21e8000.serial: Rx FIFO overrun [29715.411609] imx-uart 21f4000.serial: Rx FIFO overrun [29717.410064] libphy: 20b4000.ethernet:02 - Link is Down [29717.415355] imx-uart 21ec000.serial: Rx FIFO overrun [29720.420762] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29722.420351] libphy: 20b4000.ethernet:02 - Link is Down [29737.420437] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29737.426411] imx-uart 21ec000.serial: Rx FIFO overrun [29739.430391] libphy: 20b4000.ethernet:02 - Link is Down [29774.430452] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29776.430363] libphy: 20b4000.ethernet:02 - Link is Down [29776.435649] imx-uart 21e8000.serial: Rx FIFO overrun [29776.440726] imx-uart 21f4000.serial: Rx FIFO overrun [29792.440334] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29794.440022] libphy: 20b4000.ethernet:02 - Link is Down [29811.440456] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29811.446427] imx-uart 21ec000.serial: Rx FIFO overrun [29813.449985] libphy: 20b4000.ethernet:02 - Link is Down [29870.450308] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29870.456281] imx-uart 21e8000.serial: Rx FIFO overrun [29870.461414] imx-uart 21f4000.serial: Rx FIFO overrun [29872.460010] libphy: 20b4000.ethernet:02 - Link is Down [29872.465299] imx-uart 21ec000.serial: Rx FIFO overrun [29880.470269] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29882.470558] libphy: 20b4000.ethernet:02 - Link is Down [29882.475848] imx-uart 21e8000.serial: Rx FIFO overrun [29882.480970] imx-uart 21f4000.serial: Rx FIFO overrun [29882.486035] imx-uart 21e8000.serial: Rx FIFO overrun [29882.491140] imx-uart 21f4000.serial: Rx FIFO overrun [29882.496198] imx-uart 21e8000.serial: Rx FIFO overrun [29882.501294] imx-uart 21f4000.serial: Rx FIFO overrun [29886.500322] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29888.499999] libphy: 20b4000.ethernet:02 - Link is Down [29906.500435] libphy: 20b4000.ethernet:02 - Link is Up - 10/Half [29908.500032] libphy: 20b4000.ethernet:02 - Link is Down [29910.500421] libphy: 20b4000.ethernet:02 - Link is Up - 100/Full [29910.506481] imx-uart 21e8000.serial: Rx FIFO overrun [29910.511562] imx-uart 21f4000.serial: Rx FIFO overrun 核心板是在我们的产品板上运行的，以上现象在网口eth0上不存在，而对于以上eth1的故障我们换了三块核心板，情况都差不多。 
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4个回答
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查看一下etc/network/inte**ces文件，默认是将ETH1屏蔽掉了。删除屏蔽再试一下。
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您可以检查一下硬件，看看是不是底板或线路问题
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