When debug Linux kernel, there is one more network device with "ifconfig -a", it show a bond0 device. detail information as following:
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bond0
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After check the Linux network configuration, I found disable the following configuration, the bond0 device will disappear.
make menuconfig
---> device drivers
---> Network device support
---> Bonding driver support
More detail information, please read: Documentation/networking/bonding.tx under Linux source tree.
