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66ak2H14板子万兆只测试出1Gbit的速度

Other Parts Discussed in Thread: DS100DF410, 66AK2H14

在自己的板子上

移植的版本:
uboot     K2_UBOOT_2013_01_15.02_02
linux       K2_LINUX_03.10.10_14.12

硬件:直接从dsp中引出万兆接口,采用mac to mac 模式(没PHY),外接SFP+模块,通过光纤(30cm)与普通PC上的万兆网卡连接。在PC显示该网络链路为10Gbps

通过iperf软件测试  速度只有1144Mbit/s

请问有什么办法解决···············