Network Topology 2
Configuring OSPF on the Stoke router 3
Configuring OSPF on the London router 4
Viewing the routing table for the London router 5
Displaying the OSPF neighbours on the London router 5
Displaying the OSPF database on the London router 6
Displaying OSPF on the London router’s serial 0/0/1 interface 6
Displaying the routing table on the Stoke router 7
Configuring OSPF on the Glasgow router 7
Configuring a default static route on London 8
Propagating the default static route on London via OSPF 8
Checking Stoke’s routing table for propagated default static route 9
Checking Glasgow’s routing table for propagated default static route 10
Network Topology
Passwords: c1sco and cla$$
Configuring OSPF on the Stoke router
Stoke Router. Authorised access only!
User Access Verification
Password:
Stoke>enable
Password:
Stoke#conf t
 Enter configuration commands, one per line. End with CNTL/Z.
Stoke(config)#router ospf 51
Stoke(config-router)#network 192.168.1.0 0.0.0.127 area 0
Stoke(config-router)#network 145.50.0.0 0.0.255.255 area 0
Stoke(config-router)#network 155.50.0.0 0.0.255.255 area 0
Stoke(config-router)#exit
Stoke(config)#exit
Stoke#
%SYS-5-CONFIG_I: Configured from console by console
Stoke#copy run start
Destination filename [startup-config]?
Building configuration...
[OK]
Stoke#
Configuring OSPF on the London router
London Router! Keep out! Authorised access only!
User Access Verification
Password:
London>ena
Password:
London#conf t
Enter configuration commands, one per line. End with CNTL/Z.
London(config)#router ospf 51
London(config-router)#network 192.168.1.192 0.0.0.31 area 0
London(config-router)#network 165.50.0.0 0.0.255.255 area 0
London(config-router)#network 4.0.0.0 0.255.255.255 area 0
London(config-router)#network 155.50.0.0 0.0.255.255 area 0
 London(config-router)#
00:19:00: %OSPF-5-ADJCHG: Process 51, Nbr 192.168.1.126 on Serial0/0/0 from LOADING to FULL, Loading Done
London(config-router)#exit
London(config)#exit
London#
%SYS-5-CONFIG_I: Configured from console by console
London#copy run start
Destination filename [startup-config]?
Building configuration...
[OK]
Viewing the routing table for the London router
London#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
4.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 4.0.0.0/8 is directly connected, GigabitEthernet0/1
L 4.0.0.2/32 is directly connected, GigabitEthernet0/1
O 145.50.0.0/16 [110/128] via 155.50.0.2, 00:00:55, Serial0/0/0
155.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 155.50.0.0/16 is directly connected, Serial0/0/0
L 155.50.0.1/32 is directly connected, Serial0/0/0
165.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 165.50.0.0/16 is directly connected, Serial0/0/1
L 165.50.0.1/32 is directly connected, Serial0/0/1
192.168.1.0/24 is variably subnetted, 3 subnets, 3 masks
O 192.168.1.0/25 [110/65] via 155.50.0.2, 00:00:55, Serial0/0/0
C 192.168.1.192/27 is directly connected, GigabitEthernet0/0
L 192.168.1.222/32 is directly connected, GigabitEthernet0/0
Displaying the OSPF neighbours on the London router
 London#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
192.168.1.126 0 FULL/ - 00:00:39 155.50.0.2 Serial0/0/0
London#show ip ospf ?
<1-65535> Process ID number
border-routers Border and Boundary Router Information
database Database summary
interface Interface information
neighbor Neighbor list
virtual-links Virtual link information
Displaying the OSPF database on the London router
 London#show ip ospf database
OSPF Router with ID (192.168.1.222) (Process ID 51)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
192.168.1.222 192.168.1.222 137 0x80000005 0x002c24 5
192.168.1.126 192.168.1.126 137 0x80000004 0x002ad0 4
Displaying OSPF on the London router’s serial 0/0/1 interface
 London#show ip ospf interface serial 0/0/1
Serial0/0/1 is up, line protocol is up
Internet address is 165.50.0.1/16, Area 0
Process ID 51, Router ID 192.168.1.222, Network Type POINT-TO-POINT, Cost: 64
Transmit Delay is 1 sec, State POINT-TO-POINT, Priority 0
No designated router on this network
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:02
Index 2/2, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Suppress hello for 0 neighbor(s)
Displaying the routing table on the Stoke router
Stoke#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
O 4.0.0.0/8 [110/65] via 155.50.0.1, 00:03:40, Serial0/0/1
145.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 145.50.0.0/16 is directly connected, Serial0/0/0
L 145.50.0.1/32 is directly connected, Serial0/0/0
155.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 155.50.0.0/16 is directly connected, Serial0/0/1
L 155.50.0.2/32 is directly connected, Serial0/0/1
O 165.50.0.0/16 [110/128] via 155.50.0.1, 00:03:40, Serial0/0/1
192.168.1.0/24 is variably subnetted, 3 subnets, 3 masks
C 192.168.1.0/25 is directly connected, GigabitEthernet0/0
L 192.168.1.126/32 is directly connected, GigabitEthernet0/0
O 192.168.1.192/27 [110/65] via 155.50.0.1, 00:03:40, Serial0/0/1
Stoke#
Configuring OSPF on the Glasgow router
Glasgow router! Authorized access only! Keep out!
User Access Verification
Password:
Glasgow>enable
Password:
Glasgow#conf t
 Enter configuration commands, one per line. End with CNTL/Z.
Glasgow(config)#router ospf 51
Glasgow(config-router)#network 192.168.1.128 0.0.0.63 area 0
Glasgow(config-router)#network 165.50.0.0 0.0.255.255 area 0
Glasgow(config-router)#network 145.50.0.0 0.0.255.255 area 0
00:31:33: %OSPF-5-ADJCHG: Process 51, Nbr 192.168.1.222 on Serial0/0/1 from LOADING to FULL, Loading Done
Glasgow(config-router)#
00:31:34: %OSPF-5-ADJCHG: Process 51, Nbr 192.168.1.126 on Serial0/0/0 from LOADING to FULL, Loading Done
Glasgow(config-router)#exit
Glasgow(config)#exit
Glasgow#
Glasgow#copy run start
Destination filename [startup-config]?
Building configuration...
[OK]
Glasgow#
Configuring a default static route on London
London#conf t
Enter configuration commands, one per line. End with CNTL/Z.
London(config)#ip route 0.0.0.0 0.0.0.0 gigabitEthernet 0/1
Propagating the default static route on London via OSPF
London(config)#router ospf 51
London(config-router)#default-information originate
London(config-router)#exit
London(config)#exit
London#
London#copy run start
Destination filename [startup-config]?
Building configuration...
[OK]
London#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 0.0.0.0 to network 0.0.0.0
4.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 4.0.0.0/8 is directly connected, GigabitEthernet0/1
L 4.0.0.2/32 is directly connected, GigabitEthernet0/1
O 145.50.0.0/16 [110/128] via 165.50.0.2, 00:01:38, Serial0/0/1
[110/128] via 155.50.0.2, 00:01:38, Serial0/0/0
155.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 155.50.0.0/16 is directly connected, Serial0/0/0
L 155.50.0.1/32 is directly connected, Serial0/0/0
165.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 165.50.0.0/16 is directly connected, Serial0/0/1
L 165.50.0.1/32 is directly connected, Serial0/0/1
192.168.1.0/24 is variably subnetted, 4 subnets, 4 masks
O 192.168.1.0/25 [110/65] via 155.50.0.2, 00:14:22, Serial0/0/0
O 192.168.1.128/26 [110/65] via 165.50.0.2, 00:01:48, Serial0/0/1
C 192.168.1.192/27 is directly connected, GigabitEthernet0/0
L 192.168.1.222/32 is directly connected, GigabitEthernet0/0
S* 0.0.0.0/0 is directly connected, GigabitEthernet0/1
London#
Checking Stoke’s routing table for propagated default static route
Stoke#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 155.50.0.1 to network 0.0.0.0
O 4.0.0.0/8 [110/65] via 155.50.0.1, 00:14:52, Serial0/0/1
145.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 145.50.0.0/16 is directly connected, Serial0/0/0
L 145.50.0.1/32 is directly connected, Serial0/0/0
155.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 155.50.0.0/16 is directly connected, Serial0/0/1
L 155.50.0.2/32 is directly connected, Serial0/0/1
O 165.50.0.0/16 [110/128] via 145.50.0.2, 00:02:04, Serial0/0/0
[110/128] via 155.50.0.1, 00:02:04, Serial0/0/1
192.168.1.0/24 is variably subnetted, 4 subnets, 4 masks
C 192.168.1.0/25 is directly connected, GigabitEthernet0/0
L 192.168.1.126/32 is directly connected, GigabitEthernet0/0
O 192.168.1.128/26 [110/65] via 145.50.0.2, 00:02:04, Serial0/0/0
O 192.168.1.192/27 [110/65] via 155.50.0.1, 00:14:52, Serial0/0/1
O*E2 0.0.0.0/0 [110/1] via 155.50.0.1, 00:00:34, Serial0/0/1
Stoke#
Checking Glasgow’s routing table for propagated default static route
Glasgow# show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 165.50.0.1 to network 0.0.0.0
O 4.0.0.0/8 [110/65] via 165.50.0.1, 00:02:41, Serial0/0/1
145.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 145.50.0.0/16 is directly connected, Serial0/0/0
L 145.50.0.2/32 is directly connected, Serial0/0/0
O 155.50.0.0/16 [110/128] via 165.50.0.1, 00:02:41, Serial0/0/1
[110/128] via 145.50.0.1, 00:02:41, Serial0/0/0
165.50.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 165.50.0.0/16 is directly connected, Serial0/0/1
L 165.50.0.2/32 is directly connected, Serial0/0/1
192.168.1.0/24 is variably subnetted, 4 subnets, 4 masks
O 192.168.1.0/25 [110/65] via 145.50.0.1, 00:02:41, Serial0/0/0
C 192.168.1.128/26 is directly connected, GigabitEthernet0/0
L 192.168.1.190/32 is directly connected, GigabitEthernet0/0
O 192.168.1.192/27 [110/65] via 165.50.0.1, 00:02:41, Serial0/0/1
O*E2 0.0.0.0/0 [110/1] via 165.50.0.1, 00:01:00, Serial0/0/1
Glasgow#
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