tcpip-icmp

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ICMP測試

更新記錄

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20150824 第一版

目錄

TCP-IP / ICMP

  • 使用wireshark抓取封包內容

  • 第8個送出ICMP(ping request)，第9個接到ICMP(ping reply)

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  • 細節

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  • 板端訊息
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  ./tcpdump -i eth0 -nn

# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:09:52:77:00:11  
          inet addr:192.168.1.111  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::209:52ff:fe77:11/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1505 errors:0 dropped:237 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:181598 (177.3 KiB)  TX bytes:2552 (2.4 KiB)
          Interrupt:56 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:19 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2128 (2.0 KiB)  TX bytes:2128 (2.0 KiB)

# ping 192.168.1.51
PING 192.168.1.51 (192.168.1.51): 56 data bytes
00:10:12.682608 IP 192.168.1.111 > 192.168.1.51: ICMP echo request, id 56068, seq 0, length 64
00:10:12.683152 IP 192.168.1.51 > 192.168.1.111: ICMP echo reply, id 56068, seq 0, length 64
64 bytes from 192.168.1.51: seq=0 ttl=128 time=0.753 ms
00:10:13.682903 IP 192.168.1.111 > 192.168.1.51: ICMP echo request, id 56068, seq 1, length 64
00:10:13.683484 IP 192.168.1.51 > 192.168.1.111: ICMP echo reply, id 56068, seq 1, length 64
64 bytes from 192.168.1.51: seq=1 ttl=128 time=0.742 ms
00:10:14.683091 IP 192.168.1.111 > 192.168.1.51: ICMP echo request, id 56068, seq 2, length 64
00:10:14.683540 IP 192.168.1.51 > 192.168.1.111: ICMP echo reply, id 56068, seq 2, length 64
64 bytes from 192.168.1.51: seq=2 ttl=128 time=0.590 ms
00:10:15.683265 IP 192.168.1.111 > 192.168.1.51: ICMP echo request, id 56068, seq 3, length 64
00:10:15.683872 IP 192.168.1.51 > 192.168.1.111: ICMP echo reply, id 56068, seq 3, length 64
64 bytes from 192.168.1.51: seq=3 ttl=128 time=0.752 ms

參考來原