Basic OSPF Configuration LAB
This lab uses routers: R1, R2, R3, R4, R5.
Configure OSPF process 1 on all routers with AREA 0.
Tasks
- Check in all routers:
- OSPF route
- Neighborship
- Database
Configure OSPF LAB
OSPF Configuration on R1
hostname R1
interface Loopback0
ipv4 address 1.1.0.1 255.255.255.255
!
interface GigabitEthernet0/0/0/1
ipv4 address 1.1.12.1 255.255.255.0
!
interface GigabitEthernet0/0/0/2
ipv4 address 1.1.13.1 255.255.255.0
!
interface GigabitEthernet0/0/0/4
ipv4 address 1.1.14.1 255.255.255.0
!
interface GigabitEthernet0/0/0/5
ipv4 address 1.1.15.1 255.255.255.0
!
router ospf 1
router-id 1.1.0.1
area 0
interface Loopback0
interface GigabitEthernet0/0/0/1
interface GigabitEthernet0/0/0/2
interface GigabitEthernet0/0/0/4
interface GigabitEthernet0/0/0/5
OSPF Configuration on R2
hostname R2
interface Loopback0
ipv4 address 1.1.0.2 255.255.255.255
!
interface GigabitEthernet0/0/0/1
ipv4 address 1.1.12.2 255.255.255.0
!
interface GigabitEthernet0/0/0/3
ipv4 address 1.1.23.2 255.255.255.0
!
router ospf 1
router-id 1.1.0.2
area 0
interface Loopback0
interface GigabitEthernet0/0/0/1
interface GigabitEthernet0/0/0/3
OSPF Configuration on R3
hostname R3
interface Loopback0
ipv4 address 1.1.0.3 255.255.255.255
!
interface GigabitEthernet0/0/0/2
ipv4 address 1.1.13.3 255.255.255.0
!
interface GigabitEthernet0/0/0/3
ipv4 address 1.1.23.3 255.255.255.0
!
router ospf 1
router-id 1.1.0.3
area 0
interface Loopback0
interface GigabitEthernet0/0/0/2
interface GigabitEthernet0/0/0/3
OSPF Configuration on R4
hostname R4
interface Loopback0
ipv4 address 1.1.0.4 255.255.255.255
!
interface GigabitEthernet0/0/0/3
ipv4 address 1.1.45.4 255.255.255.0
!
interface GigabitEthernet0/0/0/4
ipv4 address 1.1.14.4 255.255.255.0
!
router ospf 1
router-id 1.1.0.4
area 0
interface Loopback0
interface GigabitEthernet0/0/0/3
interface GigabitEthernet0/0/0/4
OSPF Configuration on R5
hostname R5
interface Loopback0
ipv4 address 1.1.0.5 255.255.255.255
!
interface GigabitEthernet0/0/0/3
ipv4 address 1.1.45.5 255.255.255.0
!
interface GigabitEthernet0/0/0/5
ipv4 address 1.1.15.5 255.255.255.0
!
router ospf 1
router-id 1.1.0.5
area 0
interface Loopback0
interface GigabitEthernet0/0/0/3
interface GigabitEthernet0/0/0/5
Verification Commands
Check OSPF Neighbors on R1
RP/0/0/CPU0:R1#show ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
1.1.0.2 1 FULL/DR 00:00:34 1.1.12.2 GigabitEthernet0/0/0/1
1.1.0.3 1 FULL/DR 00:00:38 1.1.13.3 GigabitEthernet0/0/0/2
1.1.0.4 1 FULL/DR 00:00:38 1.1.14.4 GigabitEthernet0/0/0/4
1.1.0.5 1 FULL/DR 00:00:38 1.1.15.5 GigabitEthernet0/0/0/5
Total neighbor count: 4
Check OSPF Database on R1
RP/0/0/CPU0:R1#show ospf database
OSPF Router with ID (1.1.0.1) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.0.1 1.1.0.1 1943 0x80000006 0x00e173 5
1.1.0.2 1.1.0.2 1949 0x80000004 0x00416a 3
1.1.0.3 1.1.0.3 1949 0x80000004 0x00bfe3 3
1.1.0.4 1.1.0.4 1944 0x80000004 0x0095d7 3
1.1.0.5 1.1.0.5 1944 0x80000003 0x003a2c 3
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
1.1.12.2 1.1.0.2 1954 0x80000001 0x001d02
1.1.13.3 1.1.0.3 1964 0x80000001 0x00100b
1.1.14.4 1.1.0.4 1948 0x80000001 0x000314
1.1.15.5 1.1.0.5 1944 0x80000001 0x00f51d
1.1.23.3 1.1.0.3 1950 0x80000001 0x00ab64
1.1.45.5 1.1.0.5 1944 0x80000001 0x00c829
Check OSPF Enabled Interfaces on R1
RP/0/0/CPU0:R1#show ospf interface brief
Interfaces for OSPF 1
Interface PID Area IP Address/Mask Cost State Nbrs F/C
Lo0 1 0 1.1.0.1/32 1 LOOP 0/0
Gi0/0/0/1 1 0 1.1.12.1/24 1 BDR 1/1
Gi0/0/0/2 1 0 1.1.13.1/24 1 BDR 1/1
Gi0/0/0/4 1 0 1.1.14.1/24 1 BDR 1/1
Gi0/0/0/5 1 0 1.1.15.1/24 1 BDR 1/1
Check OSPF Routes on R1
RP/0/0/CPU0:R1#show ip route ospf
O 1.1.0.2/32 [110/2] via 1.1.12.2, 00:36:37, GigabitEthernet0/0/0/1
O 1.1.0.3/32 [110/2] via 1.1.13.3, 00:36:47, GigabitEthernet0/0/0/2
O 1.1.0.4/32 [110/2] via 1.1.14.4, 00:36:30, GigabitEthernet0/0/0/4
O 1.1.0.5/32 [110/2] via 1.1.15.5, 00:36:26, GigabitEthernet0/0/0/5
O 1.1.23.0/24 [110/2] via 1.1.13.3, 00:36:33, GigabitEthernet0/0/0/2
[110/2] via 1.1.12.2, 00:36:33, GigabitEthernet0/0/0/1
O 1.1.45.0/24 [110/2] via 1.1.15.5, 00:36:26, GigabitEthernet0/0/0/5
[110/2] via 1.1.14.4, 00:36:26, GigabitEthernet0/0/0/4