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AM335X设置MTU无效



目前在测AM335X的千兆网通信,使用双RGMII接口,PHY用的AR8033。

使用pcap抓包,接受到的是MAC包,现在测试单个包800个Bytes可正常接受,但单个包6000个Bytes就无法接受,通过ifconfig eth1 mtu 9000 up修改mtu,ifconfig产看mtu已正确修改,但大数据的数据包还是接受不到,请教各位可能是什么原因造成的?