CertExams.com Simulator Lab Exercises Answers

Description: Configure frame-relay using point-to-point sub-interfaces. This example uses 4 routers connected together in the form of a star using sub-interfaces.

Note that on a frame-relay network without sub-interfaces, the LMI-type is automatically detected. Similarly, PVC DLCIs are learned through CMS status messages. There is no need to specify the same explicitly. On the otherhand, in a FR network with point-to-point sub-interface configurations, you need to specify the interface-dlci number.

Instructions:

IP Address Assignment Table

Device-Interface-Sub Interface	IP Address/Mask
NY-S0.1	192.160.1.1/24
NY-S0.2	192.160.2.1/24
NY-S0.3	192.160.3.1/24
ND-S0.1	192.160.1.2/24
London-S0.1	192.160.2.2/24
LA-S0.1	192.160.3.2/24

Router NY:

1. Specify hostname

2. Enter sub-interface configuration mode for s0.1

3. Specify ip address

4. Specify interface-dlci number 62

5. Exit

6. Specify hostname

7. Enter sub-interface configuration mode for s0.2.

8. Specify ip address

9. Specify interface-dlci number 63

10. Exit

11. Specify hostname

12. Enter sub-interface configuration mode for s0.3

13. Specify ip address

14. Specify interface-dlci number 64

15. Exit

Router ND:

1. Specify hostname

2. Specify frame-relay encapsulation

3. Enter sub-interface configuration mode for s0.1

4. Specify ip address

5. Specify interface-dlci number 62

6. Exit

Router London :

1. Specify hostname

2. Specify frame-relay encapsulation

3. Enter sub-interface configuration mode for s0.1

4. Specify ip address

5. Specify interface-dlci number 63

6. Exit

Router LA:

1. Specify hostname

2. Specify frame-relay encapsulation

3. Enter sub-interface configuration mode for s0.1

4. Specify ip address

5. Specify interface-dlci number 64

6. Exit

R1>enable
R1#conf term
R1(config)#hostname NY
NY(config)#interface serial 0
NY(config-if)#encapsulation frame-relay
NY(config-if)#exit
NY(config)#interface serial 0.1 point-to-point
NY(config-subif)#ip address 192.160.1.1 255.255.255.0
NY(config-subif)#frame-relay interface-dlci 62
NY(config-subif)#exit
NY(config)#interface serial 0.2 point-to-point
NY(config-subif)#ip address 192.160.2.1 255.255.255.0
NY(config-subif)#frame-relay interface-dlci 63
NY(config-subif)#exit
NY(config)#interface serial 0.3 point-to-point
NY(config-subif)#ip address 192.160.3.1 255.255.255.0
NY(config-subif)#frame-relay interface-dlci 64
NY(config-subif)#^z
NY#copy running-config startup-config

R2>enable
R2#configure terminal
R2(config)#hostname ND
ND(config)#interface serial 0
ND(config-if)#encapsulation frame-relay
ND(config-if)#exit
ND(config)#interface serial 0.1 point-to-point
ND(config-subif)#ip address 192.160.1.2 255.255.255.0
ND(config-subif)#frame-relay interface-dlci 62
ND(config-subif)#^z
ND#copy running-config startup-config

R3>enable
R3#configure terminal
R3(config)#hostname London
London(config)#interface serial 0
London(config-if)#encapsulation frame-relay
London(config-if)#exit
London(config)#interface serial 0.1 point-to-point
London(config-subif)#ip address 192.160.2.2 255.255.255.0
London(config-subif)#frame-relay interface-dlci 63
London(config-subif)#^z
London#copy running-config startup-config

R4>enable
R4#configure terminal
R4(config)#hostname LA
LA(config)#interface serial 0
LA(config-if)#encapsulation frame-relay
LA(config-if)#exit
LA(config)#interface serial 0.1 point-to-point
LA(config-subif)#ip address 192.160.3.2 255.255.255.0
LA(config-subif)#frame-relay interface-dlci 64
LA(config-subif)#^z
LA#copy running-config startup-config