重复DUPLICATE,同一个序号的ICMP包却收到了多个回应. 一般在PING网段广播地址才会出现这种情况,但这里的地址应该不是广播地址,为什么. 1、远端交换机或HUB流量超过负载,即堵塞;重启交换机或者HUB解决. 这种情况很难得.除非有恶意的行为.故意不回复IP冲突检测的包. Duplicates may occur in many situations and are rarely (if ever) a good sign, although the presence of low levels of duplicates may not always be cause for alarm.