多區域OSPF的基本配置

一、場景設置

 

 

二、具體配置

 

1、RA的配置如下：

Router(config)#hostname RA
RA(config)#interface Loopback0
RA(config-if)#ip address 1.1.1.1 255.255.255.0
RA(config-if)#ip ospf network point-to-point
RA(config-if)#exit
RA(config)#interface Serial1/0
RA(config-if)#ip address 200.200.10.1 255.255.255.0
RA(config-if)#no shutdown
RA(config-if)#exit
RA(config)#router ospf 1
RA(config-router)#network 1.1.1.0 0.0.0.255 area 1
RA(config-router)#network 200.200.10.0 0.0.0.255 area 1
RA(config-router)#exit

 

2、RB的配置如下：

Router(config)#hostname RB
RB(config)#interface Loopback0
RB(config-if)#ip address 2.2.2.2 255.255.255.0
RB(config-if)#ip ospf network point-to-point
RB(config-if)#exit
RB(config)#interface Serial1/0
RB(config-if)#ip address 200.200.10.2 255.255.255.0
RB(config-if)#no shutdown
RB(config-if)#exit
RB(config)#interface Serial1/1
RB(config-if)#ip address 200.200.20.1 255.255.255.0
RB(config-if)#no shutdown
RB(config-if)#exit
RB(config)#router ospf 1
RB(config-router)#network 200.200.10.0 0.0.0.255 area 1
RB(config-router)#network 200.200.20.0 0.0.0.255 area 0
RB(config-router)#network 2.2.2.0 0.0.0.255 area 0
RB(config-router)#exit

 

3、RC的配置如下：

Router(config)#hostname RC
RC(config)#interface Loopback0
RC(config-if)#ip address 3.3.3.3 255.255.255.0
RC(config-if)#ip ospf network point-to-point
RC(config-if)#exit
RC(config)#interface Serial1/1
RC(config-if)#ip address 200.200.20.2 255.255.255.0
RC(config-if)#no shutdown
RC(config-if)#exit
RC(config)#interface Serial1/0
RC(config-if)#ip address 200.200.30.1 255.255.255.0
RC(config-if)#no shutdown
RC(config-if)#exit
RC(config)#router ospf 1
RC(config-router)#network 3.3.3.0 0.0.0.255 area 0
RC(config-router)#network 200.200.20.0 0.0.0.255 area 0
RC(config-router)#network 200.200.30.0 0.0.0.255 area 2
RC(config-router)#exit

 

4、RD的配置如下：

Router(config)#hostname RD
RD(config)#interface Loopback0
RD(config-if)#ip address 4.4.4.4 255.255.255.0
RD(config-if)#ip ospf network point-to-point
RD(config-if)#exit
RD(config)#interface Serial1/0
RD(config-if)#ip address 200.200.30.2 255.255.255.0
RD(config-if)#no shutdown
RD(config-if)#exit
RD(config)#router ospf 1
RD(config-router)#network 4.4.4.0 0.0.0.255 area 2
RD(config-router)#network 200.200.30.0 0.0.0.255 area 2
RD(config-router)#exit

 

三、驗證配置

 

1、查看路由器的OSPF路由表：

 

RA#show ip route ospf
O IA 200.200.20.0/24 [110/128] via 200.200.10.2, 00:10:10, Serial1/0
     2.0.0.0/24 is subnetted, 1 subnets
O IA    2.2.2.0 [110/65] via 200.200.10.2, 00:15:33, Serial1/0
     3.0.0.0/24 is subnetted, 1 subnets
O IA    3.3.3.0 [110/129] via 200.200.10.2, 00:07:49, Serial1/0
     4.0.0.0/24 is subnetted, 1 subnets
O IA    4.4.4.0 [110/193] via 200.200.10.2, 00:01:53, Serial1/0
O IA 200.200.30.0/24 [110/192] via 200.200.10.2, 00:02:43, Serial1/0

 

RB#show ip route ospf
     1.0.0.0/24 is subnetted, 1 subnets
O       1.1.1.0 [110/65] via 200.200.10.1, 00:16:05, Serial1/0
     3.0.0.0/24 is subnetted, 1 subnets
O       3.3.3.0 [110/65] via 200.200.20.2, 00:03:25, Serial1/1
     4.0.0.0/24 is subnetted, 1 subnets
O IA    4.4.4.0 [110/129] via 200.200.20.2, 00:02:34, Serial1/1
O IA 200.200.30.0/24 [110/128] via 200.200.20.2, 00:03:25, Serial1/1

 

RC#show ip route ospf
     1.0.0.0/24 is subnetted, 1 subnets
O IA    1.1.1.0 [110/129] via 200.200.20.1, 00:03:19, Serial1/1
     2.0.0.0/24 is subnetted, 1 subnets
O       2.2.2.0 [110/65] via 200.200.20.1, 00:04:10, Serial1/1
     4.0.0.0/24 is subnetted, 1 subnets
O       4.4.4.0 [110/65] via 200.200.30.2, 00:03:19, Serial1/0
O IA 200.200.10.0/24 [110/128] via 200.200.20.1, 00:03:19, Serial1/1

 

RD#show ip route ospf
O IA 200.200.20.0/24 [110/128] via 200.200.30.1, 00:04:01, Serial1/0
     1.0.0.0/24 is subnetted, 1 subnets
O IA    1.1.1.0 [110/193] via 200.200.30.1, 00:04:01, Serial1/0
     2.0.0.0/24 is subnetted, 1 subnets
O IA    2.2.2.0 [110/129] via 200.200.30.1, 00:04:01, Serial1/0
     3.0.0.0/24 is subnetted, 1 subnets
O IA    3.3.3.0 [110/65] via 200.200.30.1, 00:04:01, Serial1/0
O IA 200.200.10.0/24 [110/192] via 200.200.30.1, 00:04:01, Serial1/0

 

2、查看路由器詳細的鄰居信息：

 

RA#show ip ospf neighbor detail
 Neighbor 2.2.2.2, interface address 200.200.10.2
    In the area 1 via interface Serial1/0
    Neighbor priority is 0, State is FULL, 6 state changes
    DR is 0.0.0.0 BDR is 0.0.0.0
    Options is 0x52
    LLS Options is 0x1 (LR)
    Dead timer due in 00:00:35
    Neighbor is up for 00:21:53
    Index 1/1, retransmission queue length 0, number of retransmission 1
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 1, maximum is 1
    Last retransmission scan time is 0 msec, maximum is 0 msec

 

RB#show ip ospf neighbor detail
 Neighbor 3.3.3.3, interface address 200.200.20.2
    In the area 0 via interface Serial1/1
    Neighbor priority is 0, State is FULL, 6 state changes
    DR is 0.0.0.0 BDR is 0.0.0.0
    Options is 0x52
    LLS Options is 0x1 (LR)
    Dead timer due in 00:00:33
    Neighbor is up for 00:14:43
    Index 1/2, retransmission queue length 0, number of retransmission 1
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 1, maximum is 1
    Last retransmission scan time is 0 msec, maximum is 0 msec
 Neighbor 1.1.1.1, interface address 200.200.10.1
    In the area 1 via interface Serial1/0
    Neighbor priority is 0, State is FULL, 6 state changes
    DR is 0.0.0.0 BDR is 0.0.0.0
    Options is 0x52
    LLS Options is 0x1 (LR)
    Dead timer due in 00:00:36
    Neighbor is up for 00:23:24
    Index 1/1, retransmission queue length 0, number of retransmission 0
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 0, maximum is 0
    Last retransmission scan time is 0 msec, maximum is 0 msec

 

RC#show ip ospf neighbor detail
 Neighbor 2.2.2.2, interface address 200.200.20.1
    In the area 0 via interface Serial1/1
    Neighbor priority is 0, State is FULL, 6 state changes
    DR is 0.0.0.0 BDR is 0.0.0.0
    Options is 0x52
    LLS Options is 0x1 (LR)
    Dead timer due in 00:00:39
    Neighbor is up for 00:16:10
    Index 1/1, retransmission queue length 0, number of retransmission 0
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 0, maximum is 0
    Last retransmission scan time is 0 msec, maximum is 0 msec
 Neighbor 4.4.4.4, interface address 200.200.30.2
    In the area 2 via interface Serial1/0
    Neighbor priority is 0, State is FULL, 6 state changes
    DR is 0.0.0.0 BDR is 0.0.0.0
    Options is 0x52
    LLS Options is 0x1 (LR)
    Dead timer due in 00:00:32
    Neighbor is up for 00:10:14
    Index 1/2, retransmission queue length 0, number of retransmission 1
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 1, maximum is 1
    Last retransmission scan time is 0 msec, maximum is 0 msec

 

RD#show ip ospf neighbor detail
 Neighbor 3.3.3.3, interface address 200.200.30.1
    In the area 2 via interface Serial1/0
    Neighbor priority is 0, State is FULL, 6 state changes
    DR is 0.0.0.0 BDR is 0.0.0.0
    Options is 0x52
    LLS Options is 0x1 (LR)
    Dead timer due in 00:00:34
    Neighbor is up for 00:11:05
    Index 1/1, retransmission queue length 0, number of retransmission 0
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 0, maximum is 0
    Last retransmission scan time is 0 msec, maximum is 0 msec

 

3、查看路由器的OSPF數據庫：

 

RA#show ip ospf database

            OSPF Router with ID (1.1.1.1) (Process ID 1)

                Router Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum Link count
1.1.1.1         1.1.1.1         1600        0x80000003 0x005CE9 3
2.2.2.2         2.2.2.2         1545        0x80000003 0x00E073 2

                Summary Net Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum
2.2.2.0         2.2.2.2         1540        0x80000001 0x000F1F
3.3.3.0         2.2.2.2         1076        0x80000001 0x006D7D
4.4.4.0         2.2.2.2         720         0x80000001 0x00CBDB
200.200.20.0    2.2.2.2         1217        0x80000001 0x0057F7
200.200.30.0    2.2.2.2         770         0x80000001 0x006B99

 

RB#show ip ospf database

            OSPF Router with ID (2.2.2.2) (Process ID 1)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
2.2.2.2         2.2.2.2         1096        0x80000004 0x0052CE 3
3.3.3.3         3.3.3.3         801         0x80000004 0x00E830 3

                Summary Net Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum
1.1.1.0         2.2.2.2         1560        0x80000001 0x00B53B
4.4.4.0         3.3.3.3         746         0x80000001 0x002BB8
200.200.10.0    2.2.2.2         1560        0x80000001 0x00C593
200.200.30.0    3.3.3.3         796         0x80000001 0x00CA76

                Router Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum Link count
1.1.1.1         1.1.1.1         1616        0x80000003 0x005CE9 3
2.2.2.2         2.2.2.2         1559        0x80000003 0x00E073 2

                Summary Net Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum
2.2.2.0         2.2.2.2         1555        0x80000001 0x000F1F
3.3.3.0         2.2.2.2         1093        0x80000001 0x006D7D
4.4.4.0         2.2.2.2         747         0x80000001 0x00CBDB
200.200.20.0    2.2.2.2         1234        0x80000001 0x0057F7
200.200.30.0    2.2.2.2         798         0x80000001 0x006B99

 

RC#show ip ospf database

            OSPF Router with ID (3.3.3.3) (Process ID 1)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
2.2.2.2         2.2.2.2         1132        0x80000004 0x0052CE 3
3.3.3.3         3.3.3.3         826         0x80000004 0x00E830 3

                Summary Net Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum
1.1.1.0         2.2.2.2         1596        0x80000001 0x00B53B
4.4.4.0         3.3.3.3         771         0x80000001 0x002BB8
200.200.10.0    2.2.2.2         1596        0x80000001 0x00C593
200.200.30.0    3.3.3.3         822         0x80000001 0x00CA76

                Router Link States (Area 2)

Link ID         ADV Router      Age         Seq#       Checksum Link count
3.3.3.3         3.3.3.3         776         0x80000003 0x009781 2
4.4.4.4         4.4.4.4         776         0x80000003 0x007384 3

                Summary Net Link States (Area 2)

Link ID         ADV Router      Age         Seq#       Checksum
1.1.1.0         3.3.3.3         827         0x80000001 0x001A92
2.2.2.0         3.3.3.3         850         0x80000001 0x007376
3.3.3.0         3.3.3.3         850         0x80000001 0x00CC5A
200.200.10.0    3.3.3.3         850         0x80000001 0x002AEA
200.200.20.0    3.3.3.3         851         0x80000001 0x003912

 

RD#show ip ospf database

            OSPF Router with ID (4.4.4.4) (Process ID 1)

                Router Link States (Area 2)

Link ID         ADV Router      Age         Seq#       Checksum Link count
3.3.3.3         3.3.3.3         826         0x80000003 0x009781 2
4.4.4.4         4.4.4.4         826         0x80000003 0x007384 3

                Summary Net Link States (Area 2)

Link ID         ADV Router      Age         Seq#       Checksum
1.1.1.0         3.3.3.3         878         0x80000001 0x001A92
2.2.2.0         3.3.3.3         878         0x80000001 0x007376
3.3.3.0         3.3.3.3         878         0x80000001 0x00CC5A
200.200.10.0    3.3.3.3         878         0x80000001 0x002AEA
200.200.20.0    3.3.3.3         878         0x80000001 0x003912

 

 

 

 

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