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

5. Then open up one for workstation B. When Ethereal first comes up everything is
sequentially ordered by time. Let’s change to ordering by “protocol.” Just click
on the protocol button near the headers to sort them alphabetically by protocol
from A to Z. Clicking “protocol” again will sort them descending from Z to A.
Notice here how we have two entry routes into the network.
Click here
Supplemental Lab or Challenge Activity:
1. Try using workstation C without the second gateway. What happens when you try to
ping both A and B?
2. Since Ethereal is showing us our IGRP responses then where are the requests
(queries)?
3. We also see that we are using IGRP version 1…is there an IGRP version 2? We
know RIP has a version 2.
4. Why do we have two entries into our network on workstation B?
5. What would you expect to see on workstation A?
6. How could we force a IGRP routing update?
7. Repeat this lab using a class “B” IP addressing scheme.
8. Repeat this lab using a class “C” IP addressing scheme.
So What Did I Learn Here?
In this lab you learned how to capture IGRP packets with Ethereal. In our next lab you
will expand upon this by changing the metrics over our Ethernet lines and “watch” the
routing in action. Having fun yet? This stuff is just so much fun!
290