多区域OSPF的基本配置

一、场景设置




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[align=left]二、具体配置[/align]
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[align=left]1、RA的配置如下：[/align]
[align=left]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[/align]
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[align=left]2、RB的配置如下：[/align]
[align=left]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[/align]
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[align=left]3、RC的配置如下：[/align]
[align=left]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[/align]
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[align=left]4、RD的配置如下：[/align]
[align=left]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[/align]
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[align=left]三、验证配置[/align]
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[align=left]1、查看路由器的OSPF路由表：[/align]
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[align=left]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[/align]
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[align=left]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[/align]
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[align=left]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[/align]
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[align=left]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[/align]

2、查看路由器详细的邻居信息：

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数据库：

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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