Free Play Labs – CCNA Vol 1, Chapter 17

The book example lists output from the  show ip route connected command, which on real gear lists connected and local routes. In the tested version of PT, PT lists only connects routes. You may prefer to simply use the show ip route instead, which lists both connected and local routes in both real gear and PT.

This example lists show command output. The book does not specify whether the output comes from a network configured like Example 17-1 or like either of the variations in Example 17-2. For the purposes of this PKT file, we configured the router (B1) like the lower half of Example 17-2.

The example lists the output from the show vlans command – a command not accepted in PT.

Note that to enable layer 3 switching (that is, routing) in the PT layer 3 switch, you also need to add the sdm prefer routing on the 3560 L3 switch. This command is the logical equivalent of the sdm prefer lanbase-routing command listed in the book. (The ending topology/configuration includes this command.)

This example lists output from the show ip route command on the layer 3 switch. Note that PT omits local routes (the /32 routes that routers and layer 3 switches create for each interface IP address.) But you can still do the lab, and just ignore the differences between the book example’s output (which lists local routes) vs. PT.

We do not supply a PKT file to match this example because PT’s behavior with the sdm prefer command differs too much from the output in the example, which was taken from a real 2960S switch. However, you can experiment with the sdm prefer command on your own in the various PT switch models.

This book example lists the output from four show commands on the layer 3 switch. A few of the particular bits of output noted in the example happen to be listed incorrectly in PT. For the four commands in the example, here are the differences we observed:

1. The show interfaces g0/1 command on real gear (as shown in the book example) would list the IP address near the top of the output; PT does not list this value.
2. The show interfaces status command on real gear (as shown in the book example) looks the same as the PT output in this case.
3. The show ip route command on real gear (and in the book example) includes local routes; PT does not.
4. The show interfaces g0/1 switchport command on real gear (and in the book example) lists the switch port status as disabled (due to the configuration of the no switchport interface subcommand); PT incorrectly shows the switchport status as enabled.

You can still repeat the example, but keep the differences in mind.

To repeat this book example, you need to configure both layer 3 switches for the two-link EtherChannel shown in the middle of Figure 17-7 in the book. Note that both the initial and ending topology/configuration parts of the PKT file pre-configure the ports and VLANs connected to the PCs, so that you can concentrate on the EtherChannel.

Also, note that the figure in the book uses port numbers that cannot be replicated with PT switches, so we used the following different port numbers:

• Fa0/21 > G1/0/21
• Fa0/22 > G1/0/22
• Fa0/23 > G1/0/23
• Fa0/24 > G1/0/24

Note that the output of the show ip route command in the book correctly includes local routes along with connected routes; PT does not include the local routes.

The book example lists the command show etherchannel 12 summary, but PT does not support that specific command. Instead, omit the “12”, and use show etherchannel summary, for which PT shows the equivalent output.