结合ping和tcpdump快速定位网络问题
tcpdump -nni eth0 icmp and host IP1 and host IP2tcpdump -w /tmp/icmp.pcap -nni eth0 icmptcpdump -C 100 -w /tmp/icmp.pcap -nni eth0 icmptcpdump -W 50 -C 100 -w /tmp/icmp.pcap -nni eth0 icmpip.addr==IP and not icmp.resp_in and icmp.type==8案例
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