OSPF Lab 3

Tasks:

Enable OSPF on the routers .All the interfaces should belong to area 0 and R1 should elected Designated Router. Do not use neighbor  command on R1.

Lab Diagram:

NB: Click here to download the .net file and the initial configuration files.

Solutions:

R1:
interface Serial1/0
ip ospf network broadcast

router ospf 1
network 0.0.0.0 255.255.255.255 area 0

R2:
interface Serial1/0
ip ospf network broadcast
ip ospf priority 0

router ospf 1
network 0.0.0.0 255.255.255.255 area 0

R3:
interface Serial1/0
ip ospf network broadcast
ip ospf priority 0

router ospf 1
network 0.0.0.0 255.255.255.255 area 0

Verification:

R1#show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
22.22.123.2       0   FULL/DROTHER    00:00:36    22.22.123.2     Serial1/0
22.22.123.3       0   FULL/DROTHER    00:00:38    22.22.123.3     Serial1/0

R1#show ip route ospf
22.0.0.0/24 is subnetted, 4 subnets
O       22.22.2.0 [110/65] via 22.22.123.2, 00:00:10, Serial1/0
O       22.22.3.0 [110/65] via 22.22.123.3, 00:00:10, Serial1/0

R2#show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
22.22.123.1       1   FULL/DR         00:00:39    22.22.123.1     Serial1/0

R2#show ip route ospf
22.0.0.0/24 is subnetted, 4 subnets
O       22.22.1.0 [110/65] via 22.22.123.1, 00:00:22, Serial1/0
O       22.22.3.0 [110/65] via 22.22.123.3, 00:00:22, Serial1/0

R3#sh ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
22.22.123.1       1   FULL/DR         00:00:37    22.22.123.1     Serial1/0

R3#show ip route ospf
22.0.0.0/24 is subnetted, 4 subnets
O       22.22.1.0 [110/65] via 22.22.123.1, 00:00:23, Serial1/0
O       22.22.2.0 [110/65] via 22.22.123.2, 00:00:23, Serial1/0