This paper designed a kind of fiber bypass instructment based on 10 Gbit/s transport system

which protects the node devices of backbone network

we focus on the key issues during the u-boot transplantation process base on MPC8308ERDB. With the u-boot provids the most abundant supports for the PowerPC processors

and combined with the BSP source codes

analysed the compliation and configuration process of the u-boot

and finally emphatically analyzed the transplantation of the u-boot.