If an error occurs during the routing, such as when the selected route has a transmission problem that corrupts the frame, an Internet Control Message Protocol (ICMP) packet is delivered to the host, informing the host of the problem.
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- 如果在寻找路径的过程中发生错误,比如当一条选中的路径发生传输硬件故障从而破坏了帧时,一个互联网控制信息协议(ICMP)数据包就送达发出此帧的主机,通知该机此帧数据发生了问题。