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

Protocol Deathmatch: RIP versus RIPv2
Objectives:
To be able to discern between RIP and RIPv2 and when to use each. (A good review of
part 2)
Lab Design:
Workstation “A”
Router name: robert morris worm
Workstation “B”
Step-by-Step Instructions for RIP:
1. Set up the network shown using a 24-bit mask with a Class “C” private address using
RIP as the routing protocol. Don’t forget to advertise the routes.
2. Test ping from workstation A to workstation B.
3. Do a trace route from workstation A to workstation B.
4. On each router view and record its routing table.
5. Turn on all debug on Robert and Worm.
6. Test ping from workstation A to workstation B and view the ICMP messages on
Robert and Worm.
7. Change the serial lines to a 30-bit mask. (hint: the IP numbers will also need to be
changed).
8. Repeat steps 2-6. About 60% of the time you will not be able to ping from
workstation A to workstation B. A known quirk with RIP. Don’t sweat it if it works.
9. Switch to using RIP version 2 on all routers.
10. Repeat steps 2-6. So why do you think it works with RIPv2 and not RIP? Why or
when would you use RIPv2 instead of RIP? Why or when would you use RIP instead
of RIPv2?
Guest Router Name Derivation
In 1991 Robert Morris became the first individual convicted for violating the 1986
Federal Computer Fraud and Abuse Act. He created an internet worm as part of a
graduate school project whose sole purpose was to expose security vulnerabilities in
networks so that network administrators could pro-actively fix any security holes.
Unfortunately the project went amiss and computer networks crashed left and right when
it was released errantly on the Internet. In hind-sight he should have kept it a little better
under control. It just goes to show you that good intentions also get punished…
“ignorance of the law is no excuse.”
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