Chapter 4 : Lab 4.5.2 Diagramming Intranet Traffic Flows

Step 1: Cable and configure the current network

a. Referring to the topology diagram, connect the console (or rollover) cable to the console port on the

router and the other cable end to the PC1 computer with a DB-9 or DB-25 adapter to the COM 1 port.

Ensure that power has been applied to both the host computer and router.

b. Establish a HyperTerminal or other terminal emulation program to the router.

c. Ping between Host1 and Host2 and between the hosts and Discovery Server to confirm network

connectivity. Troubleshoot and establish connectivity if the pings fail.

Step 2: Configure NetFlow on the interfaces

From the global configuration mode, issue the following commands to configure NetFlow:

FC-CPE-1(config)#interface fastethernet 0/0

FC-CPE-1(config-if)#ip flow egress

FC-CPE-1(config-if)#ip flow ingress

FC-CPE-1(config-if)#interface fastethernet 0/1

FC-CPE-1(config-if)#ip flow ingress

FC-CPE-1(config-if)#ip flow egress

FC-CPE-1(config-if)#end

Step 3: Verify the NetFlow configuration

a. From the privileged EXEC mode, issue the show ip flow interface command.

FC-CPE-1#show ip flow interface

FastEthernet0/0

ip flow ingress

ip flow egress

FastEthernet0/1

ip flow ingress

ip flow egress

Confirm that the output shown above is displayed. Troubleshoot your configuration if this output is not

displayed.

b. From the privileged EXEC mode, issue the following command to ensure that flow cache statistics are

reset:

FC-CPE-1#clear ip flow stats

Step 4: Create network data traffic

A range of network application data flows between the Host1, Host2, and the server is to be generated and captured. Generate as many of the data flows shown below as is possible in your lab. Your instructor will advise you of the particular applications that are available to be used in this lab.

a. On Host1, launch a web browser and enter the URL http://server.discovery.ccna

b. On Host2, launch a web browser and enter the URL http://server.discovery.ccna

If Discovery Server is not being used, then use http://172.17.1.1 to access the web services

configured on that server.

c. Use FTP to download a file.

On Host1 and Host2, launch a web browser and enter the URL ftp://server.discovery.ccna,

or issue ftp server.discovery.ccna from the command line. If DNS is not configured, use the

IP address 172.17.1.1 instead of the domain name.

Download a file from the server.

d. If email accounts have been configured using the POP3 and SMTP services on Discovery Server,

send two emails between users on Host1 and Host2 using these accounts.

e. Set up Windows file sharing between Host1 and Host2 and copy a file from one to the other.

Step 5: View the data flows

At the conclusion of the data flow, view the details by issuing the show ip cache verbose flow

command from privileged EXEC mode.

FC-CPE-1#show ip cache verbose flow

Application Type Source Destination Comments
Web Intranet Web Server Host1
Web Intranet Web Server Host2
File Transfer Intranet File Server Host1
File Transfer Intranet File Server Host2
Email Host1 Email Server
Email Host2 Email Server
File Share Host1 Host2

Step 6: Clean up

Erase the configurations and reload the routers and switches. Disconnect and store the cabling. For PC hosts that are normally connected to other networks (such as the school LAN or to the Internet), reconnect the appropriate cabling and restore the TCP/IP settings.

Challenge

This lab simulates LAN data traffic. The LAN data flows of a production network would be much more

extensive and recorded over a greater period of time, perhaps a full working week.

a. On the FilmCompany initial current network topology shown on the next page, add PC host and

printer icons as listed for each VLAN. Draw a circle that encloses the local LAN segments.

b. Then, using the data flows recorded in this lab as a starting point, use different colors to mark the

different LAN data flows between hosts and the server.



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