OSPFV2 Multi area Technology ( Configuration )

OSPFV2 Multi area configuration

OSPFV2 Multi area configuration

Router R1:

R1(config)#: interface GigabitEthernet0/0
R1(config-if)#ip address 10.1.1.1 255.255.255.0

R1(config)#: interface GigabitEthernet0/1
R1(config-if)#ip address 10.1.2.1 255.255.255.0

R1(config)#: interface Serial0/3/0
R1(config-if)#ip address 192.168.10.1 255.255.255.252
R1(config-if)#clock rate 64000

OSPFV2 Configuration Command:

R1(config)#router ospf 10
R1(config-router)#router-id 1.1.1.1
R1(config-router)#network 10.1.1.1 0.0.0.0 area 1
R1(config-router)#network 10.1.2.1 0.0.0.0 area 1
R1(config-router)#network 192.168.10.1 0.0.0.0 area 0
R1(config-router)#

Summarizing OSPF: 

R1(config)#router ospf 10

R1(config-router)#area 1 range 10.1.0.0 255.255.252.0
Router R2:

R2(config)#interface Serial0/3/0
R2(config-if)#ip address 192.168.10.2 255.255.255.252
R2(config)#

R2(config)#interface Serial0/3/1
R2(config-if)#ip address 192.168.10.5 255.255.255.252
R2(config-if)clock rate 64000

R2(config)#router ospf 10
R2(config-router)#router-id 2.2.2.2
R2(config-router)#network 192.168.10.0 0.0.0.3 area 0
R2(config-router)#network 192.168.10.4 0.0.0.3 area 0
R2(config-router)#
Router R3:

R3(config)#interface GigabitEthernet0/0
R3(config-if)# ip address 192.168.1.1 255.255.255.0

R3(config)#interface GigabitEthernet0/1
R3(config-if)# ip address 192.168.2.1 255.255.255.0
R3(config)#interface Serial0/3/1
R3(config-if)#ip address 192.168.10.6 255.255.255.252
Router(config)#hostname R3
R3(config)#router ospf 10
R3(config-router)#router-id 3.3.3.3
R3(config-router)#network 192.168.10.6 0.0.0.0 area 0
R3(config-router)#network 192.168.1.1 0.0.0.0 area 2

R3(config-router)#network 192.168.2.1 0.0.0.0 area 2
R3(config-router)#end

Summarizing OSPF: 

R2(config)#router ospf 10

R2(config-router)#area 2 range 192.168.0.0 255.255.252.0

Verification and Troubleshooting Command:

R3#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/ – 00:00:38 192.168.10.5 Serial0/3/1
R3#
R3#
R3#show ip ospf border-routers
OSPF Process 10 internal Routing Table

Codes: i – Intra-area route, I – Inter-area route

i 1.1.1.1 [128] via 192.168.10.5, Serial0/3/1, ABR, Area 0, SPF 128
R3#
R1#show ip ospf interface

R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/ – 00:00:30 192.168.10.2 Serial0/3/0
R1#

R1#show ip ospf border-routers
OSPF Process 10 internal Routing Table

Codes: i – Intra-area route, I – Inter-area route

i 3.3.3.3 [128] via 192.168.10.2, Serial0/3/0, ABR, Area 0, SPF 128
R1#
R1#show ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 10)

Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 239 0x80000002 0x00ffcf 2
2.2.2.2 2.2.2.2 164 0x80000004 0x00bc75 4
3.3.3.3 3.3.3.3 144 0x80000003 0x0004b1 2

Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.1.1.0 1.1.1.1 284 0x80000001 0x00db72
10.1.2.0 1.1.1.1 284 0x80000002 0x00ce7d
192.168.1.0 3.3.3.3 139 0x80000001 0x007c6b
192.168.2.0 3.3.3.3 119 0x80000002 0x006f76

Router Link States (Area 1)

Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 288 0x80000003 0x008f8f 2

Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
192.168.10.0 1.1.1.1 284 0x80000001 0x00bbee
192.168.10.4 1.1.1.1 219 0x80000002 0x001451
192.168.1.0 1.1.1.1 134 0x80000003 0x00b9b3
192.168.2.0 1.1.1.1 114 0x80000004 0x00acbe
R1#

R1#show ip route ospf
O IA 192.168.1.0 [110/129] via 192.168.10.2, 00:04:37, Serial0/3/0
O IA 192.168.2.0 [110/129] via 192.168.10.2, 00:04:17, Serial0/3/0
192.168.10.0/24 is variably subnetted, 3 subnets, 2 masks
O 192.168.10.4 [110/128] via 192.168.10.2, 00:06:03, Serial0/3/0
R2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 0 FULL/ – 00:00:31 192.168.10.1 Serial0/3/0
3.3.3.3 0 FULL/ – 00:00:34 192.168.10.6 Serial0/3/1
R2#

R2#show ip ospf border-routers
OSPF Process 10 internal Routing Table

Codes: i – Intra-area route, I – Inter-area route

i 1.1.1.1 [64] via 192.168.10.1, Serial0/3/0, ABR, Area 0, SPF 64
i 3.3.3.3 [64] via 192.168.10.6, Serial0/3/1, ABR, Area 0, SPF 64
R2#

R2#show ip ospf database
OSPF Router with ID (2.2.2.2) (Process ID 10)

Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 304 0x80000002 0x00ffcf 2
2.2.2.2 2.2.2.2 230 0x80000004 0x00bc75 4
3.3.3.3 3.3.3.3 209 0x80000003 0x0004b1 2

Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.1.1.0 1.1.1.1 349 0x80000001 0x00db72
10.1.2.0 1.1.1.1 349 0x80000002 0x00ce7d
192.168.1.0 3.3.3.3 204 0x80000001 0x007c6b
192.168.2.0 3.3.3.3 184 0x80000002 0x006f76
R2#

List of verification command:

R1# show Ip route OSPF
R1#show IP OSPF NEIGHBOR
R1#SHOW IP OSPF
R1#SHOW IP OSPF INTERFACE
R1#SHOW IP PROTOCOLS
R1#SHOW IP OSPF INTERFACE BRIEF
R1#SHOW IP OSPF DATABASE
R1#SHOW IP OSF BORDER-ROUTERS

Summarizing OSPF verification Command:

R3#show ip route ospf

10.0.0.0/22 is subnetted, 1 subnets

O IA 10.1.0.0 [110/129] via 192.168.10.5, 00:00:55, Serial0/3/1

192.168.10.0/24 is variably subnetted, 3 subnets, 2 masks

O 192.168.10.0 [110/128] via 192.168.10.5, 00:01:05, Serial0/3/1

R3#

Thank you

Momataj Momo

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