Objective: Learn to configure a full mesh topology.
Lab Equipment: Router 1, Router 2, Router 3, and Router 4 from the eRouters menu
Background Reading: Lab Primer Lesson 9: Frame Relay
Again, the company’s corporate office is in Dallas and its sales offices are in San Francisco, New York, and Tampa. The sales offices should be able to access all company resources. You want to establish a full mesh topology in which a point-to-point Frame Relay connection links the corporate office to each sales office and links each sales office to every other sales office.
The difference between the Frame Relay hub-and-spoke topology and the full mesh topology is that, with a full mesh topology, every sales office has a direct connection to every other sales office and the corporate office. This is a very redundant topology so if one of the connections fails,data can still be transferred to every site by using a different path.

1. First, assign the host names of Dallas, San_Francisco, New_York, and Tampa to Router 1, Router 2, Router 3, and Router 4, respectively.
Dallas:
San_Francisco:
New_York:
Tampa:

2. Now, enter interface configuration mode for the serial 0 interface on Dallas, and set the encapsulation type to Frame Relay. Be sure to enable the interface.
Dallas(config)#interface serial 0
Dallas(config-if)#encapsulation frame-relay
Dallas(config-if)#no shutdown

3. Next, create a subinterface for the connection between Dallas and the San Francisco sales office.
Dallas(config-if)#exit
Dallas(config)#interface serial 0.100 point-to-point
Dallas(config-subif)#

4. Assign the subinterface the DLCI number for the connection from Dallas to San_Francisco, and configure the subinterface with the appropriate IP address. Remember to enable the subinterface.
Dallas(config-subif)#frame-relay interface-dlci 102
Dallas(config-subif)#ip address 172.16.1.1 255.255.255.0
Dallas(config-subif)#no shutdown

5. Create a subinterface for the connection from Dallas to the sales office in New York.
Dallas(config-subif)#exit
Dallas(config)#interface serial 0.200 point-to-point
Dallas(config-subif)#

6. Add the correct DLCI for the connection from Dallas to New_York, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
Dallas(config-subif)#frame-relay interface-dlci 103
Dallas(config-subif)#ip address 172.16.2.1 255.255.255.0
Dallas(config-subif)#no shutdown

7. Create a subinterface for the connection from Dallas to the sales office in Tampa.
Dallas(config-subif)#exit
Dallas(config)#interface serial 0.300 point-to-point
Dallas(config-subif)#

8. Add the correct DLCI for the connection from Dallas to Tampa, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
Dallas(config-subif)#frame-relay interface-dlci 104
Dallas(config-subif)#ip address 172.16.3.1 255.255.255.0
Dallas(config-subif)#no shutdown

9. Access the serial 0 interface of San_Francisco, set the encapsulation to Frame Relay, and enable the interface.
San_Francisco(config)#interface serial 0
San_Francisco(config-if)#encapsulation frame-relay
San_Francisco(config-if)#no shutdown

10. Create the first subinterface for the connection from San_Francisco to the corporate office in Dallas.
San_Francisco(config-if)#interface serial 0.100 point-to-point
San_Francisco(config-subif)#

11. Add the correct DLCI for the connection from San_Francisco to Dallas, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
San_Francisco(config-subif)#frame-relay interface-dlci 201
San_Francisco(config-subif)#ip address 172.16.1.2 255.255.255.0
San_Francisco(config-subif)#no shutdown

12. Create a subinterface for the connection from San_Francisco to New_York.
San_Francisco(config-subif)#exit
San_Francisco(config)#interface serial 0.200 point-to-point

13. Add the correct DLCI value for the connection from San_Francisco to New_York, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
San_Francisco(config-subif)#frame-relay interface-dlci 203
San_Francisco(config-subif)#ip address 172.16.4.1 255.255.255.0
San_Francisco(config-subif)#no shutdown

14. Create the subinterface for the connection from San_Francisco to Tampa.
San_Francisco(config-subif)#exit
San_Francisco(config)#interface serial 0.300 point-to-point

15. Add the correct DLCI value for the San_Francisco to Tampa connection, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
San_Francisco(config-subif)#frame-relay interface-dlci 204
San_Francisco(config-subif)#ip address 172.16.6.1 255.255.255.0
San_Francisco(config-subif)#no shutdown

16. Access the serial 0 interface of New_York, set the encapsulation to Frame Relay, and enable the interface.
New_York(config)#interface serial 0
New_York(config-if)#encapsulation frame-relay
New_York(config-if)#no shutdown

17. Create the fi rst subinterface for the connection from New_York to the corporate office in Dallas.
New_York(config-if)#exit
New_York(config)#interface serial 0.100 point-to-point

18. Add the correct DLCI value for the connection from New_York to Dallas, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
New_York(config-subif)#frame-relay interface-dlci 301
New_York(config-subif)#ip address 172.16.2.2 255.255.255.0
New_York(config-subif)#no shutdown

19. Create the subinterface for the connection from New_York to San_Francisco.
New_York(config-subif)#exit
New_York(config)#interface serial 0.200 point-to-point

20. Add the correct DLCI value for the connection from New_York to San_Francisco, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
New_York(config-subif)#frame-relay interface-dlci 302
New_York(config-subif)#ip address 172.16.4.2 255.255.255.0
New_York(config-subif)#no shutdown

21. Create the subinterface for the connection from New_York to Tampa.
New_York(config-subif)#exit
New_York(config)#interface serial 0.300 point-to-point

22. Add the correct DLCI value for the New_York to Tampa connection, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
New_York(config-subif)#frame-relay interface-dlci 304
New_York(config-subif)#ip address 172.16.5.1 255.255.255.0
New_York(config-subif)#no shutdown

23. Access the serial 0 interface on Tampa, set the encapsulation to Frame Relay, and enable the interface.
Tampa(config)#interface serial 0
Tampa(config-if)#encapsulation frame-relay
Tampa(config-if)#no shutdown

24. Create the first subinterface for the connection from Tampa to the corporate office in Dallas.
Tampa(config-if)#exit
Tampa(config)#interface serial 0.100 point-to-point

25. Add the correct DLCI value for the Tampa to Dallas connection, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
Tampa(config-subif)#frame-relay interface-dlci 401
Tampa(config-subif)#ip address 172.16.3.2 255.255.255.0
Tampa(config-subif)#no shutdown

26. Create the subinterface for the connection from Tampa to San_Francisco.
Tampa(config-subif)#exit
Tampa(config)#interface serial 0.200 point-to-point

27. Add the correct DLCI value for the Tampa to San_Francisco connection, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
Tampa(config-if)#frame-relay interface-dlci 402
Tampa(config-subif)#ip address 172.16.6.2 255.255.255.0
Tampa(config-subif)#no shutdown

28. Create the subinterface for the connection from Tampa to New_York.
Tampa(config-subif)#exit
Tampa(config)#interface serial 0.300 point-to-point

29. Add the correct DLCI value for the Tampa to New_York connection, and configure the appropriate IP address for the subinterface. Remember to enable the subinterface.
Tampa(config-subif)#frame-relay interface-dlci 403
Tampa(config-subif)#ip address 172.16.5.2 255.255.255.0
Tampa(config-subif)#no shutdown

30. Now, all interfaces should be up and up. To test the configuration, connect to Dallas and try to ping each of the three sales offices.
Dallas(config-subif)#exit
Dallas(config)#exit
Dallas#ping 172.16.1.2
Dallas#ping 172.16.2.2
Dallas#ping 172.16.3.2

31. Connect to San_Francisco, and try to ping the other three offices.
San_Francisco(config-subif)#exit
San_Francisco(config)#exit
San_Francisco#ping 172.16.1.1
San_Francisco#ping 172.16.4.2
San_Francisco#ping 172.16.6.2
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