Discovering computer networks: hands on in the Open Networking Lab
Discovering computer networks: hands on in the Open Networking Lab

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8.1 Tracing the route

Traceroute is a diagnostic tool for locating blockages on the route of an IP packet. This section shows you how to use it. Traceroute is also useful for giving an idea of the number of routers, and sometimes their locations, that a packet has to pass though to reach its destination.

Now watch the video below, which is about 6 minutes long.

Tracing the route

Download this video clip.Video player: 51_tracing_the_route.mp4
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Activity 1 Try it out

20 minutes

  1. Configure the computers on this PT Anywhere [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] network.

  2. Send a traceroute probe to one of the computers from the other.

  3. Send a traceroute probe from the router to one of the computers. Bear in mind that the router is a Cisco device.

  4. Send a traceroute probe from any device to 127.0.0.1. (This is an example of a loopback address. Loopback addresses were explained in Session 2, Section 2.5.)

The next video compares traceroute responses when a computer uses a wired connection and Wi-Fi.

Now watch the video below, which is about 2 minutes long.

Traceroute using wired and wireless connections

Download this video clip.Video player: 52_traceroute_using_wired.mp4
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