Pathping

Pathping是Windows系統中自帶的一個網路診斷工具，用於檢測本地至目的地之間節點的網路延遲和穩定性。

## 原理

pathping在一段時間內，從本地至目的地之間發送多個Echo Request消息給中間經過的每個節點，然後基於數據包從每個路由器返回的資訊來計算結果。所以，pathping可以顯示每個節點的數據包丟失的百分比，以便判斷具體哪個節點或子網可能出現網路故障。pathping與tracert執行相同的路由跟蹤命令去識別這條路徑上有哪些路由器，但它額外多了一個步驟：給每個節點發送100個數據包，獲取返回資訊後去計算每個節點的統計資訊。

## 範例

```
C:\Documents and Settings\User>''pathping''
Usage: pathping [-g host-list] [-h maximum_hops] [-i address] [-n]
[-p period] [-q num_queries] [-w timeout] [-P] [-R] [-T]
[-4] [-6] target_name
Options:
-g host-list Loose source route along host-list.
-h maximum_hops Maximum number of hops to search for target.
-i address Use the specified source address.
-n Do not resolve addresses to hostnames.
-p period Wait period milliseconds between pings.
-q num_queries Number of queries per hop.
-w timeout Wait timeout milliseconds for each reply.
-P Test for RSVP PATH connectivity.
-R Test if each hop is RSVP aware.
-T Test connectivity to each hop with Layer-2 priority tags.
-4 Force using IPv4.
-6 Force using IPv6.<ref>
```

```dos
 C:\Documents and Settings\User>ver
 
 Microsoft Windows XP [Version 5.1.2600]
```

## 例子

```
 >''pathping wikipedia.org''
Tracing route to wikipedia.com [207.142.131.235]
over a maximum of 30 hops:
0 simonslaptop [192.168.0.11]
1 192.168.0.1
2 thus1-hg2.ilford.broadband.bt.net [217.32.64.73]
3 217.32.64.34
4 217.32.64.110
5 anchor-border-1-4-0-2-191.router.demon.net [212.240.162.126]
6 anchor-core-2-g0-0-1.router.demon.net [194.70.98.29]
7 ny1-border-1-a1-0-s2.router.demon.net [194.70.97.66]
8 ge-8-0-153.ipcolo1.NewYork1.Level3.net [209.246.123.177]
9 ae-0-51.bbr1.NewYork1.Level3.net [64.159.17.1]
10 so-2-0-0.mp1.Tampa1.Level3.net [209.247.11.201]
11 ge-6-0.hsa2.Tampa1.Level3.net [64.159.1.10]
12 unknown.Level3.net [63.208.24.2]
13
Computing statistics for 325 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 simonslaptop [192.168.0.11]
0/ 100 = 0% |
1 0ms 0/ 100 = 0% 0/ 100 = 0% 192.168.0.1
0/ 100 = 0% |
2 18ms 1/ 100 = 1% 1/ 100 = 1% thus1-hg2.ilford.broadband.bt.net [217.32.64.73]
0/ 100 = 0% |
3 18ms 0/ 100 = 0% 0/ 100 = 0% 217.32.64.34
0/ 100 = 0% |
4 21ms 0/ 100 = 0% 0/ 100 = 0% 217.32.64.110
0/ 100 = 0% |
5 21ms 1/ 100 = 1% 1/ 100 = 1% anchor-border-1-4-0-2-191.router.demon.net [212.240.162.126]
0/ 100 = 0% |
6 --- 100/ 100 =100% 100/ 100 =100% anchor-core-2-g0-0-1.router.demon.net [194.70.98.29]
0/ 100 = 0% |
7 --- 100/ 100 =100% 100/ 100 =100% ny1-border-1-a1-0-s2.router.demon.net [194.70.97.66]
0/ 100 = 0% |
8 100ms 0/ 100 = 0% 0/ 100 = 0% ge-8-0-153.ipcolo1.NewYork1.Level3.net [209.246.123.177]
0/ 100 = 0% |
9 94ms 0/ 100 = 0% 0/ 100 = 0% ae-0-51.bbr1.NewYork1.Level3.net [64.159.17.1]
0/ 100 = 0% |
10 134ms 1/ 100 = 1% 1/ 100 = 1% so-2-0-0.mp1.Tampa1.Level3.net [209.247.11.201]
0/ 100 = 0% |
11 137ms 0/ 100 = 0% 0/ 100 = 0% ge-6-0.hsa2.Tampa1.Level3.net [64.159.1.10]
0/ 100 = 0% |
12 131ms 0/ 100 = 0% 0/ 100 = 0% unknown.Level3.net [63.208.24.2]
100/ 100 =100% |
13 --- 100/ 100 =100% 0/ 100 = 0% win2000 [0.0.0.0]
Trace complete.

>''pathping wikipedia.org -q 10''<ref>note the shorter wait with only 10 queries per hop instead of the default 100</ref>
Tracing route to wikipedia.org [66.230.200.100]
over a maximum of 30 hops:
0 Aaron.hsd1.mn.comcast.net. [192.168.11.3]
1 air.setup [192.168.11.1]
2 73.127.68.1
3 ge-1-38-ur01.minnetonka.mn.minn.comcast.net [68.86.234.41]
4 68.86.232.37
5 68.86.232.33
6 * 68.86.232.5
7 68.86.232.1
8 12.116.99.41
9 tbr2.cgcil.ip.att.net [12.122.99.70]
10 * ggr2.cgcil.ip.att.net [12.123.6.69]
11 ar1-a3120s2.wswdc.ip.att.net [192.205.34.6]
12 66.192.247.163
13 ge8-13.csw5-pmtpa.wikimedia.org [66.193.50.242]
14 * rr.pmtpa.wikimedia.org [66.230.200.100]
Computing statistics for 35 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 Aaron.hsd1.mn.comcast.net. [192.168.11.3]
0/ 10 = 0% |
1 0ms 0/ 10 = 0% 0/ 10 = 0% air.setup [192.168.11.1]
0/ 10 = 0% |
2 8ms 0/ 10 = 0% 0/ 10 = 0% 73.127.68.1
0/ 10 = 0% |
3 8ms 0/ 10 = 0% 0/ 10 = 0% ge-1-38-ur01.minnetonka.mn.minn.comcast.net [68.86.234.41]
0/ 10 = 0% |
4 9ms 0/ 10 = 0% 0/ 10 = 0% 68.86.232.37
0/ 10 = 0% |
5 8ms 0/ 10 = 0% 0/ 10 = 0% 68.86.232.33
0/ 10 = 0% |
6 12ms 0/ 10 = 0% 0/ 10 = 0% 68.86.232.5
0/ 10 = 0% |
7 8ms 0/ 10 = 0% 0/ 10 = 0% 68.86.232.1
0/ 10 = 0% |
8 20ms 0/ 10 = 0% 0/ 10 = 0% 12.116.99.41
0/ 10 = 0% |
9 --- 10/ 10 =100% 10/ 10 =100% tbr2.cgcil.ip.att.net [12.122.99.70]
0/ 10 = 0% |
10 --- 10/ 10 =100% 10/ 10 =100% ggr2.cgcil.ip.att.net [12.123.6.69]
0/ 10 = 0% |
11 --- 10/ 10 =100% 10/ 10 =100% ar1-a3120s2.wswdc.ip.att.net [192.205.34.6]
0/ 10 = 0% |
12 --- 10/ 10 =100% 10/ 10 =100% 66.192.247.163
0/ 10 = 0% |
13 63ms 0/ 10 = 0% 0/ 10 = 0% ge8-13.csw5-pmtpa.wikimedia.org [66.193.50.242]
0/ 10 = 0% |
14 63ms 0/ 10 = 0% 0/ 10 = 0% rr.pmtpa.wikimedia.org [66.230.200.100]
Trace complete.

>''pathping wikipedia.org -n''
Tracing route to wikipedia-lb.eqiad.wikimedia.org [208.80.154.225]over a maximum of 30 hops:
0 192.168.1.102
1 192.168.1.1
2 10.202.181.110
3 10.202.182.109
4 10.202.181.153
5 10.202.181.49
6 212.72.4.97
7 82.178.32.102
8 63.218.109.117
9 63.218.44.38
10 206.111.0.249
11 216.156.8.189
12 * * *
Computing statistics for 275 seconds...
```