Learning by Doing: CISCO Certified Network ... - SCN Research

4. Stop the capture. You should see good icmp request and reply statements. It should
look something like this:
Figure 1—Good icmp request and replies seen.
5. a should be able to ping to b and c.
6. b should be able to ping to a and c.
7. c should be able to ping to a and b.
8. Now let’s go and “enable” VTP on the bx port on the top switch:
a. From the main menu, click on [M] for menus.
b. Click on [V] for VLAN assignments
c. Click on [T] for Trunk Configuration (only A and B are allowed to be
trunks)
d. Type in [b] to make changes to port bx
e. Click on [T] for trunking (off by default)
f. Type “1” to enable VTP (turn it on)
g. Exit all the way out to the main menu if you want.
9. Start the Ethereal capture again.
10. Ping from workstation b to c again. (It should not work…“Request Timed Out”).
11. Stop the Ethereal capture. You should see only icmp requests…no replies
anywhere…this is because the VTP stops the requests from getting through. You
should see something like figure 2 on the next page.
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