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以往的产品设计中,比如单板卡上可能有3个DSP、2个FPGA,希望通过SGMII互联,然后选用BCM5389这样的以太网SWITCH把3个DSP和2个FPGA互联,如图1
但是如今66AK2H14支持4个SGMII口,如果我单板要实现1片66AK2H14+2片C6678+2片FPGA,这样的话,我将2片C6678和2片FPGA连接到66AK2H14上,如图2
比较上述两图,图2能否达到图1那样的两两以太网交换的性能?或者说用66AK2H14内部的以太网SIWTCH替代BCM5389,会有哪些优势、劣势?