最後更新: 2015-07-08

目錄

• tracepath
• mtr

tracepath

* discovering MTU along this path

* It uses UDP port

Install

apt-get install iputils-tracepath

Usage

tracepath [-n] [-b] [-l pktlen] destination [port]

Opts:

-n      IP addresses numerically
-l       Sets the initial packet length

output:

 1:  203.xxx.xxx.158                                       0.058ms pmtu 1500
 1:  203.xxx.xxx.254                                       0.798ms
 1:  203.xxx.xxx.254                                       0.586ms
 2:  202.xxx.xxx.66                                        0.967ms
 3:  202.67.141.73                                         1.339ms asymm  2
 4:  203.131.241.97                                        2.697ms asymm  3
 5:  129.250.6.126                                         2.699ms asymm  4
 6:  129.250.3.124                                        57.624ms
 7:  129.250.8.58                                         82.392ms asymm 13
 8:  202.97.58.106                                       147.986ms asymm 10
 9:  202.97.61.217                                        79.618ms asymm 11
10:  202.97.53.85                                        142.849ms asymm 12
11:  58.61.216.122                                       161.268ms asymm 13
12:  113.98.78.206                                       165.791ms asymm 15
13:  121.8.223.110                                       136.036ms asymm 15
14:  no reply
15:  no reply
16:  no reply

column:

 - TTL
 - network hop
 - information about path (RTT, "Path MTU", async(path isasymmetric))

mtr

它的功能是 ping 在 path 上所有的 node, 查看 package drop 情況

mtr 與 mtr-tiny 的分別

mtr - Full screen ncurses and X11 traceroute tool       <-- 會安多好多野 !!

mtr-tiny - Full screen ncurses traceroute tool (compiled without support for X)

* combines the functionality of the 'traceroute' and 'ping' programs

-u       Use UDP datagrams instead of ICMP ECHO.
-n       display numeric IP numbers
-r        puts mtr into report mode
-c       number of cycles specified by the  -c
-w      wide report mod

output:

                                                        My traceroute  [v0.82]
xxxx (0.0.0.0)                                        Wed Nov 27 15:52:51 2013
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                      Packets               Pings
 Host                               Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 203.xxx.xxx.254                  0.0%   140    0.3   1.9   0.2 126.8  11.9
 2. 202.xx.xxx.66                    0.0%   140    0.4  12.8   0.4 198.5  38.5
 3. 202.xx.xxx.73                    0.0%   139    0.6   9.3   0.4 158.4  27.4
 4. 203.xxx.xxx.97                   0.0%   139    2.3   2.4   2.1  16.9   1.3
 5. 129.250.6.126                    0.7%   139    2.0   2.7   1.9  25.7   3.4
 6. 129.250.3.76                     0.0%   139   52.8  61.0  52.5 127.7  11.3
    129.250.3.124
 7. 129.250.8.58                    31.2%   139  126.6  96.3  76.7 145.1  25.3
    129.250.9.170
    61.120.146.54
    61.120.146.58
 8. 202.97.60.150                   37.0%   139  140.6  98.7  78.1 150.6  26.5
    202.97.58.106
 9. 202.97.60.41                    30.9%   139   84.0 101.0  77.6 152.9  26.1
    202.97.53.225
10. 202.97.35.241                   26.8%   139   82.4 105.9  78.7 160.6  29.8
    202.97.53.97
11. 61.144.3.9                      32.4%   139   78.7 104.6  78.4 209.7  32.1
    202.97.80.30
12. 58.61.216.54                    34.5%   139  157.0 105.2  78.2 268.2  36.1
    183.56.33.114
13. 121.8.223.114                   33.8%   139   81.6 105.4  79.0 262.3  36.0
    183.56.29.106
14. 218.20.26.30                    32.6%   139   86.9 100.2  80.2 156.7  27.4

由表可知, 在 7 出事了