Network Design Lab
IMPORTANT
You must use Packet Tracer 5.2 or above to complete this labwork.
The objective of today's lab is to begin to apply the principles that
we have examined over the last few weeks to a simulated network.
To enable you to carry out designs and modifications to networks, you
will need to draw clear diagrams on paper.
There will always be available a good supply of A3 paper in the Cisco
lab for your network diagrams.
Part 1 - Draw a good diagram
Begin by downloading the partially
configured network for today.
Use A3 paper provided to sketch the Packet
Tracer network provided for
you.
Ensure that you have included all IP addresses (plus subnet masks) of
all hosts and
interfaces, interface descriptions and all hostnames EXACTLY as
provided.
Identify the Access, Distribution and Core layer of your network. You
may need to recap on work from earlier in the course for this.
Make sure that all details on your diagram are clear to
read by OTHER people as well as yourself.
Show your network diagram to
another student colleague to check that your work is easy to read.
This is essential to allow you to carry out more complicated work on
complex networks in the future.
Part 2 - Check the
routing tables
Check the routing tables on your router. Do this via the CLI as follows.
Chatham# show ip route
Codes: C -
connected, S - static, I
- IGRP, R - RIP, M - mobile, B - BGP
D
- EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1
- OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1
- OSPF external type 1, E2 - OSPF external type 2, E - EGP
i
- IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
*
- candidate default, U - per-user static route, o - ODR
P
- periodic downloaded static route
Gateway of last resort is not set
192.168.10.0/25 is subnetted, 2 subnets
C
192.168.10.0
is directly connected, FastEthernet0/0
C
192.168.10.128
is directly connected, FastEthernet0/1
You should see the data above.
Check the codes
table to see how the router knows about the TWO
connected networks.
1. Will your network be able to route between the two Ethernet
networks attached to the Chatham router?
Base your response on the contents of the Chatham
routing table.
2. Check whether you were correct by pinging PC3 from PC0. Do this from
the command prompt on PC0.
Were you correct in your answer to question 1? What does this mean for
checking if routing is setup correctly?
3. Now add another Router (2621XM), Switch 2950-24 and LAN to your
network.
4. Name the new router Greenwich. You will have to add serial
interfaces to the existing Chatham router and your new router
(Greenwich).
Add these to your diagram too. Show all details on
the
diagram.
Use the following addressing scheme
for the additions
Serial link
Chatham to
Greenwich 172.16.0.0 /30 (use addressses 172.16.0.1 and
172.16.0.2)
Ethernet LAN on
Greenwich
192.168.20.0 /24 (use
192.168.20.1 for the Greenwich Ethernet interface)
Set the clock rate on the Chatham end of the serial link to 125000 bps
5. Examine the Greenwich router table. Which networks appear in the
Greenwich routing table?
Do you think that the Ethernet
LAN on Greenwich can communicate with either of the Chatham LANs?
Explain your reasoning.
6. Test your assumption using ping between the LANs.
7. Now add static routing to the network to enable routing.
Use the syntax
from earlier notes
to achieve this.
8. Check the routing tables on Chatham and Greenwich routers for the
existence of all networks.
Does
this mean that routing should now take place between all networks?
9. Test your assumption about routing using a ping between PC4 and PC2.
Does this work? Troubleshoot if necessary.
10. Save your router configurations on each router and also save the
Packet Tracer file.
11. Add an enable password to both routers and a message of the day.
Save your work securely.
Further Work (Optional)
At the command prompt of the PCs there are some extra commands
implemented in PT5.
Use a ?
at the command prompt to view these commands.
Explore these commands and check their functions.