Traceroute 显示我在第四跳到达了目的地 (147.21.65.42)。 那么为什么它要多跳 15 步呢?
从我的位置来看,到该服务器的管道是 MPLS 虚拟专用网络。我认为这可能会影响 traceroute 报告的内容。
C:\>tracert example.com
Tracing route to example.com [147.21.65.42]
over a maximum of 30 hops:
1 4 ms <1 ms <1 ms 172.18.41.254
2 8 ms 10 ms 8 ms 192.168.208.30
3 14 ms 8 ms 7 ms 192.168.208.50
4 8 ms 8 ms 8 ms 147.21.65.42
5 16 ms 15 ms 16 ms 147.21.65.42
6 55 ms 54 ms 55 ms 147.21.65.42
7 55 ms 55 ms 55 ms 147.21.65.42
8 55 ms 55 ms 54 ms 147.21.65.42
9 55 ms 55 ms 55 ms 147.21.65.42
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 143 ms 135 ms 119 ms 147.21.65.42
Trace complete.
答案1
众所周知,MPLS 会破坏 Traceroute 结果:http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a008020a42a.shtml