Totally Stubby Area
LAB6: OSPF – IPv4
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LAB 6: Diagram
Note: This Lab was developed on Cisco IOS Version15.2(4) M1 ADVENTERPRISEK9-M.
LAB 6: OSPF Totally Stubby Area
Task 1: Configure OSPF Totally Stubby Area
In the configuration mode of router configure loopbacks with network address in sequence & redistribute these connected network in OSPF process
R1:
interface loopback 100
ip address 100.0.0.2 255.255.255.0
interface loopback 101
ip address 100.0.1.2 255.255.255.0
interface loopback 102
ip address 100.0.2.2 255.255.255.0
interface loopback 103
ip address 100.0.3.2 255.255.255.0
exit
R1:
router ospf 1
redistribute connected subnet metric-type 1
exit
R2#show ip route
! (Show router’s routing table and IPv4 routes entries)
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
11.0.0.0/32 is subnetted, 3 subnets
O 11.0.1.1 [110/65] via 12.0.0.1, 01:07:41, Serial2/0
O 11.0.2.1 [110/65] via 12.0.0.1, 01:07:41, Serial2/0
O 11.0.3.1 [110/65] via 12.0.0.1, 01:07:41, Serial2/0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.0.0.0/24 is directly connected, Serial2/0
L 12.0.0.2/32 is directly connected, Serial2/0
22.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 22.0.1.0/24 is directly connected, Loopback1
L 22.0.1.2/32 is directly connected, Loopback1
C 22.0.2.0/24 is directly connected, Loopback2
L 22.0.2.2/32 is directly connected, Loopback2
C 22.0.3.0/24 is directly connected, Loopback3
L 22.0.3.2/32 is directly connected, Loopback3
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.0.0.0/24 is directly connected, Ethernet0/0
L 23.0.0.2/32 is directly connected, Ethernet0/0
33.0.0.0/32 is subnetted, 3 subnets
O 33.0.1.3 [110/11] via 23.0.0.3, 01:06:57, Ethernet0/0
O 33.0.2.3 [110/11] via 23.0.0.3, 01:06:57, Ethernet0/0
O 33.0.3.3 [110/11] via 23.0.0.3, 01:06:57, Ethernet0/0
34.0.0.0/24 is subnetted, 1 subnets
O IA 34.0.0.0 [110/74] via 23.0.0.3, 01:06:57, Ethernet0/0
44.0.0.0/32 is subnetted, 3 subnets
O IA 44.0.1.4 [110/75] via 23.0.0.3, 00:01:45, Ethernet0/0
O IA 44.0.2.4 [110/75] via 23.0.0.3, 00:01:45, Ethernet0/0
O IA 44.0.3.4 [110/75] via 23.0.0.3, 00:01:45, Ethernet0/0
100.0.0.0/24 is subnetted, 4 subnets
O E1 100.0.0.0 [110/84] via 12.0.0.1, 00:11:48, Serial2/0
O E1 100.0.1.0 [110/84] via 12.0.0.1, 00:11:48, Serial2/0
O E1 100.0.2.0 [110/84] via 12.0.0.1, 00:11:48, Serial2/0
O E1 100.0.3.0 [110/84] via 12.0.0.1, 00:11:48, Serial2/0
Configure OSPF Stub
R3:
router ospf 1
area 2 stub no-summary
exit
R4:
router ospf 1
area 2 stub no-summary
exit
Task 2: Verification:
Verify routes on neighbor router routing table
R4#show ip route
! (Show router’s routing table and IPv4 routes entries)
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
i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is 34.0.0.3 to network 0.0.0.0
O*IA 0.0.0.0/0 [110/65] via 34.0.0.3, 00:00:05, Serial2/0
34.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 34.0.0.0/24 is directly connected, Serial2/0
L 34.0.0.4/32 is directly connected, Serial2/0
44.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 44.0.1.0/24 is directly connected, Loopback1
L 44.0.1.4/32 is directly connected, Loopback1
C 44.0.2.0/24 is directly connected, Loopback2
L 44.0.2.4/32 is directly connected, Loopback2
C 44.0.3.0/24 is directly connected, Loopback3
L 44.0.3.4/32 is directly connected, Loopback3
(Total Stubby area is area in which external routes LSA 5 and Inter-area routes LSA3/4 does not propagate, instead it automatically creates default route 0.0.0.0 towards ABR.)
R4#ping 100.0.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.0.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/9 ms
R4#ping 22.0.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 22.0.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/9 ms
