Quản trị mạng Lab 10 - Frame relay

CCNA LAB No. 10 Frame Relay CONFIGURATION Lab time: 1
session
 Students are recommended to read the entire lab requirement before starting. The TIP session should
only be used for troubleshooting. For any problem concerns hardware or losing connectivity, please contact
instructor.
Note
All routers are connected to the Frame-relay cloud through their S0 interfaces.
DLCI is assigned based on the virtual circuits that connect the routers.
VC connects R4 and R5 will be seen as 405 from R4 and 504 from R5
Task 1:
1. xây dựng một mạng frame-relay full mesh giữa các router – các kết nối sử dụng
cổng vật lý (tức là chưa chia sub-interface)
Router(config)#interface s0
Router(config-if)#no shut
Router(config-if)#encapsulation frame-relay
Router(config-if)#ip address 192.168.100.x 255.255.255.0 (x : the number of
router)
2. Enable inverse-arp (default)
3. Test mapping using show frame-relay map

4. Test the status of each PVC using show frame-relay pvc.
5. Test the IP connectivity between routers using ping command.
Task 2 :
1. Delete full-mesh configuration from task 1.  shut cổng, sau đó bật lại
2. Divide routers into two groups:group1 includes R1, 2, 3, 4; group2 includes R5, 6, 7, 8.
3. Disable Inverse-ARP using no frame-relay inverse-arp command  vào cổng vật lý và gõ
lệnh
Router(config)#interface s0
Router(config-if)#no frame-relay inverse-arp

4. Each router has two virtual circuits to two neighbors. Use subinterface point-to-point to

make connections between routers. Use a separate subnet for each virtual circuit.
Router(config)# int s0.1 point-to-point
Router(config-if)#ip add 192.168.xy.x 255.255.255.0
x : the number of your router
y : the number of your neighbor router
Router(config-if)#frame-relay interface-dlci x0y
5. Enable a routing protocol that supports VLSM so that routers can ping to the opposite
router.  như vậy ở đây ta có 4 miền broadcast nối với nhau  cần có một giao
thức định tuyến. vì các mạng này ở dạng point-to-point nên chỉ cần 2 địa chỉ / dải
mạng – đó là lý do sử dụng giao thức định tuyến VLSM
Router(config)# router ospf 1
Router(config)# network 192.168.xy.0 0.0.0.255 area 0
You can use one of the routing which you learned
Task 3 :
1. Delete hub-and-spoke configuration from task 2.
2. Remain the same group as Task 2
3. Disable Inverse-ARP.
Router(config-if)#no frame-relay inverse-arp
4. You decide to use subinterface point-to-multipoint with this topology to reserve IP
address. The IP subnet is 192.168.100.0 /24.
5. Tip: create a subinterface point-to-multipoint and configure map between remote IP
address and local DLCI by using frame-relay map command.
Router(config)#int s0
Router(config-if)#ip address 192.168.100.x 255.255.255.0
If router x has PVC to router y , issue the command :
Router(config-if)#Frame-relay map ip 192.168.100.y x0y
If router x has no PVC to router y , we will map to remote router via neighbor router
Exp : Router 1 to router 2 but has no PVC , so router 1 will reach to router 2 via router 3
( using PVC between router 1 and router 3 )
Router3(config-if)#frame-relay map ip 192.168.100.2 302 broadcast

Router3(config-if)#frame-relay map ip 192.168.100.1 301 broadcast
Router2(config-if)#frame-relay map ip 192.168.100.3 203 broadcast
Router1(config-if)#frame-relay map ip 192.168.100.3 103 broadcast
Router1(config-if)#frame-relay map ip 192.168.100.2 103 broadcast
6. Test the IP connectivity between routers using ping command.
Chú ý:
1 – các cổng sub interface point-to-point / multipoint không thể xóa đi
được – khi ta reload thì chúng tự động bị xóa. Nếu không muốn reload, ta
có thể sử dụng cổng khác để làm.
2 – Đối với mô hình trong Task 3: có 2 router để ở dạng multipoint và 2
router ở dạng point-to-point
Đối với các router multipoint: cần vào subinterface multipoint và dùng
lệnh frame-relay map để map tới các router khác
Đối với các router point-to-point: cần vào subinterface point-to-point và
dùng lệnh frame-relay interface dlci để gắn tĩnh dlci cho subinterface đó.
End of lab 10