自制板，基于NDK例程(helloworld)进行修改测试百兆网。
使用的是SGMII0口，在程序中已修改为初始化port0，现在的情况是link可以通，然后打印信息如下，但是ping不通。请问这可能是因为什么呢？
[C66xx_8] QMSS successfully initialized
CPPI successfully initialized
PA successfully initialized
TCP/IP Stack 'Hello World!' Application
TCP/IP Stack 'Hello World!' Application
PASS successfully initialized
Ethernet subsystem successfully initialized
Ethernet eventId : 48 and vectId (Interrupt) : 7
Registration of the EMAC Successful, waiting for link up ..
Network Added: If-1:192.168.0.11
