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DP83TC811S-Q1: Why can it not work normally ?

Part Number: DP83TC811S-Q1

Dear all

      I had find a question, I use one DP83TC811S-Q1 device as master, use other one DP83TC811S-Q1 device as slave,:

     1. When I power up the slave device, then power up the master device, the slave device can not work normally.

     2. When I power up the master device, then power up the slave device, the slave device can work normally.

     Why ? What's wrong ?

     Below is configuration information:

     Master:

echo 0xd 0x1 > /sys/class/net/eth0/device/phy_regnum

echo 0xe 0x0834 > /sys/class/net/eth0/device/phy_regnum

echo 0xd 0x4001 > /sys/class/net/eth0/device/phy_regnum

echo 0xe 0xc000> /sys/class/net/eth0/device/phy_regnum

      Slaver:

echo 0xd 0x1 > /sys/class/net/eth0/device/phy_regnum
echo 0xe 0x0834 > /sys/class/net/eth0/device/phy_regnum
echo 0xd 0x4001 > /sys/class/net/eth0/device/phy_regnum
echo 0xe 0x8000> /sys/class/net/eth0/device/phy_regnum