Traceroute 在第四跳到达目的地，然后再做 15 次

Question

Traceroute 显示我在第四跳到达目的地 (147.21.65.42)。 那么为什么它要多跳 15 次呢？

从我的位置来看，通往该服务器的管道是一个 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.

Answer 1

MPLS 以破坏 Traceroute 结果而闻名：http : //www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a008020a42a.shtml