Cisco Packet Tracer 5 Manual

							 
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6.8.3.6 Connect to a Wireless Router and Configure Basic 
Settings
 
   
Learning Objectives  
   Configure a PC to join a wireless network.  
   Test the wireless connection.  
   
Introduction  
In this activity, you will configure the Linksys WRT300N wireless router to accept  CompanyLaptop as a 
wireless client and route its IP packets.  
   
Task 0: Changing WRT300N Display Name  
Step 1.  Change the WRT300N name  
a.  Click  Wireless Router1  and navigate to the  Config tab. 
b.  Change the  Display Name  to WRS1 . 
c.  Close  WRS1  window.  
d.  Notice that the topology now shows  WRS1. 
   
Task 1: Preparing the Network  
Step 1. Preparing the Network  
Note:  This activity will ignore the existence of the  WRT300N GUI  tab to be closer to a real world 
situation. A management PC ( PC0) is going to be prepared to access the Linksys wireless router via 
a wired connection. A web browser running on  PC0 is going to be used to perform the entire 
configuration.  
a.  Select  Connections  from the bottom-left side of Packet Tracer . 
b.  Click  Copper Straight-Through  (solid black line). 
c.  Once the cursor changes to connection mode, click on  PC0 and choose  FastEthernet . 
 
d.  Click WRS1  and choose  Ethernet 1. 
   
Notice that WRT300N has 2 network segments: internal  and  internet . Ports Ethernet 1-4  and 
Wireless  are considered part of the internal  segment while the internet port is part of the  Internet. 
WRS1  will act as a layer 2 switch to the devices connected to its internal segment and as a layer 3 
router between the two segments.  PC0 is now connected to the internal segment ( Ethernet 1). Once 
Packet Tracer  displays green dots on both sides of the connection between  PC0 and WRS1, 
continue to Task 2.  
   
Note : If no green dots are shown, make sure to enable  Show Link Lights under Options > 
Preferences . 
   
    
						

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Task 2: Preparing PC0
 
In order to reach  WRS1 management page,  PC0 must be able to successfully communicate on the network. 
Linksys routers’ factory configuration includes a DHCP server. Such server is enabled by default on the 
internal LAN section of the router. To make sure  PC0 acquires an IP address from the  WRS1, configure 
PC0  to acquire IP information over DHCP.  
Step 1. Setting up PC0 to use DHCP  
a.  Click  PC0. 
b.  Select the  Desktop tab. 
c.  Select  IP Configuration . 
d.  Select  DHCP. 
e.  What is the IP address of the computer?  
 
f.   What is the subnet mask of the computer?  
 
g.  What is the default gateway of the computer?  
 
           Note: Values can vary within the network range due normal DHCP operation.  
   
Task 3: Connect to the Wireless Router  
Step 1. Logging into the Wireless Router  
a.  Close the  IP Configuration  window. 
b.  Still from the  Desktop tab in PC0, Choose  Web Browser . 
c.  Type in the IP address of the wireless router  192.168.0.1. 
d.  When asked for username and password, use  admin for both. This is the default (factory settings) 
username/password for all the Linksys products.  
e.  Once  WRS1  web based configuration page loads, continue to Step 2.  
   
Step 2. Analyzing WRS1 Main Configuration Page  
The main page deals with the router’s network setup. Scroll down this page and notice the DHCP server 
already enabled (from factory) and the range of IP addresses currently being server by the router over 
DHCP.  
a.  The IP address range served by the  WRS1 over DHCP is  192.168.0.100/24 . Is PC0  IP address 
within this range? Is this expected?  
  
						

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Step 3. Configuring WSR1 Internet Port 
Since WRS1  will be routing wireless clients’ packets to remote networks, it  is necessary to configure 
the  Internet  port. Linksys calls this interface the  Internet Interface because it usually connects to an 
external network. In this activity this interface will be connected to the network segment containing 
Server0.  
a.  Change the Internet IP address method from Automatic Configuration –  DHCP to Static IP. 
b.  Type the IP address to be assigned to the Internet interface as follows:  
Internet IP Address:      192.168.20.1  
Subnet Mask:               255.255.255.0  
Default Gateway:         192.168.20.10  
Leave the rest unchanged.  
c.  Scroll down the page and click  Save Settings. 
d.  Click  Continue  and move on to Step 4.  
   
Step 4. Configuring WSR1 SSID  
a.  From a web browser in  PC0, log back into  WRS1 (refer back to  Task 3, Step 1  for more 
information).  
b.  Navigate to  Wireless > Basic Wireless Settings . 
c.  Change  Network Name (SSID)  from Default  to aCompany . Notice that SSIDs are case-sensitive.  
d.  Keep the other settings on this page in their defaults.  
e.  Scroll down the page and click  Save Settings. 
f.   Laptop0  should now be associated to  WRS1. 
   
Task 4: Advanced Configuration  
Step 1. Change WRS1 Access Password  
a.  From a web browser in  PC0, log back into  WRS1 (refer back to  Task 3, Step 1  for more 
information).  
b.  Navigate to  Administration > Management  and change the current WRS1 current password to 
cisco . 
c.  Scroll down the window and click  Save Settings. 
d.  The login window appears. Login again but this time using the new password  cisco. 
 
e.  A page showing the message  Settings are successful is displayed. Click Continue.   
    
						

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Step 2. Changing DHCP address range in WRS1
 
Since the IP address assigned to the internal LAN interface of  WRS1 must be within the range of IP 
addresses used by DHCP, the IP address of that interface must be changed.  
a.  From a web browser in  PC0, log back into  WRS1 using 192.168.0.1 as the website address, enter 
admin  as the username and cisco  as the password. 
b.  Navigate to  Setup > Basic Setup . 
c.  Scroll down the page to  Network Setup. 
d.  The IP address assigned to  WRS1 internal LAN is 192.168.0.1/24. Change it to 192.168.50.1/24.  
e.  Scroll down the page and click  Save Settings. 
f.   Note that the DHCP range of address has been automatically updated to reflect the interface IP 
address change.  
g.  Close the  PC0 web browser.  
h.  Still from PC0 Desktop  tab, Click on the Command Prompt . 
i.   Type  ipconfig /renew to force  PC0 re-acquire its IP information via DHCP.  
j.   PC0  IP address now belongs to the 192.168.50.0/24 IP range.  
   
Ch eck your score, you should have 100%.  
  
						

							 
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Step 2. Configuring  Laptop0 wireless client  
a.  
Click on  Laptop0  to bring up its configuration window. 
b. 
Click on the  Desktop tab. 
c.  
Select  PC Wireless . 
d. 
You should see the message  No association with access point. 
e.  
Click on the  Connect tab. 
f.  
Allow a few seconds to the SSID broadcasted by  WRS1 to appear. You should see the SSID 
aCompany  listed under the  Wireless Network Name  column.
 
g. 
Select SSID  aCompany by clicking on it. Then click  Connect. 
h. 
In the  Security  field, choose  WPA2-Personal . 
i.  
Enter the password for the wireless network,  aCompWiFi (same password configured in  WRS1) and 
click Connect .
 
j.  
Laptop0 should now be associated to  WRS1. 
k. 
Take note of  Laptop0 IP address (acquired via DHCP from  WRS1) and MAC address. Close PC 
Wireless window and, still from the  Desktop tab, select  Command Prompt .
 
l.  
Type  ipconfig /all  and take note of  Laptop0 IP and MAC addresses. 
Step 3. Configuring WRS1  to support MAC Filtering 
a.  
Close the  Laptop0 configuration page. 
b. 
Click on  PC0 and open  a web browser by going to  PC0 > Desktop > Web Browser . 
c.  
Type in the IP address of  WRS1 to open its configuration web page. Enter  admin as the username 
and password when requested.
 
d. 
Navigate to  Wireless > Wireless MAC Filter . 
e.  
Select  Enabled  and Permit PCs listed below to access wireless network . 
f.  
Type in  Laptop0  MAC address (written down in Task 2, Step 2) in the  MAC 01: field. Notice the 
MAC address format required by  WRS1. It must be in the  XX:XX:XX:XX:XX:XX format.
 
g. 
Scroll down the page and click on  Save Settings. 
h. 
Because  Laptop0’s MAC address is t he only one specified,  Laptop0 is the only wireless device 
currently capable of associating to  WRS1.
 
   
						

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Step 4. Testing Connectivity  
a.  
Click on  PC0 and go to  Desktop > Command Prompt . 
b. 
Ping  RemotePC  by issuing ping 200.100.50.10 . The pings should be successful. 
c.  
Close  PC0 configuration window and click  Laptop0. 
d. 
From  Laptop0  configuration window, go to  Desktop > Command Prompt . 
e.  
Once again, ping  RemotePC by issuing ping 200.100.50.10 . The pings should also be successful. 
f.  
Close  Laptop0  configuration window. 
g. 
Click on  RemotePC  to bring up its configuration window. 
h. 
From  RemotePC  configuration window, go to  Desktop > Command Prompt . 
i.  
Ping  Server0  from RemotePC  by issuing ping 192.168.0.20 . The pings should  not be successful. 
j.  
Still from  RemotePC , open a  Web Browser  (Desktop > Web Browser) and type the address of the 
internal web page hosted at  Server0, www.acompany.com . The page should not display.
 
Pings and/or HTTP requests from  RemotePC to Server0  (or any other internal device) are not 
successful because  WRS1 doesn’t know which internal device shoul d get it. In order to accomplish that, 
Port Forwarding must be configured in  WRS1.
 
k. 
Close any device configuration window t hat may be open and continue to the next step. 
 
Step 5. Configuring Singl e Port Forward in WRS1. 
a.  
Click on  PC0 to bring up its configuration window. 
b. 
Go to  Destop > Web Browser  and connect to WRS1. 
c.  
From  WRS1  configuration web page, navigate to  Application & Gaming > Single Port 
Forwarding .
 
d. 
From the left hand menu, choose  HTTP from the first combo box. 
e.  
From the middle portion of the window, locate the first row. In the first row, change the IP address to 
match  Server0  IP address, 192.168.0.20. Also check the Enabled  check box at the end of that 
same row.
 
f.  
Scroll down the page and click  Save Settings. 
g. 
You should now be able to r each the webpage hosted in  Server0. Open a web browser in 
RemotePC .
 
h. 
In the address bar, type in  121.120.119.100. This is the IP address assigned to  WRS1 Internet port. 
i.  
You should now see t he web page hosted in  Server0. 
Check your score. You should now have 100%.