OSPF多区域的简单配置

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1、OSPF 多区域的简单配置

a、静态路由重分布，使得外部路由能注入自治系统

b、必须包含主干区域，主干区域负责收集非主干区域发出的汇总路由信息，并将这些信息返回给到其他区域

R1配置

enconf thostname R1 int loopback 0ip address 1.1.1.1 255.255.255.0no shutdownexit int f0/0ip address 192.168.1.1 255.255.255.0no shutdownexit router ospf 1network 1.1.1.0 0.0.0.255 area 0network 192.168.1.0 0.0.0.255 area 0exitend

R2配置

enconf thostname R2 int loopback 0ip address 2.2.2.2 255.255.255.0no shutdownexit int f0/0ip address 192.168.1.2 255.255.255.0no shutdownexit int f0/1ip address 192.168.2.1 255.255.255.0no shutdownexit router ospf 1network 2.2.2.0 0.0.0.255 area 0network 192.168.1.0 0.0.0.255 area 0network 192.168.2.0 0.0.0.255 area 1exitend

R3配置

enconf thostname R3 int loopback 0ip address 3.3.3.3 255.255.255.0no shutdownexit int f0/1ip address 192.168.2.2 255.255.255.0no shutdownexit int f0/0ip address 202.168.1.1 255.255.255.0no shutdownexit router ospf 1network 192.168.2.0 0.0.0.255 area 1network 3.3.3.0 0.0.0.255 area 1redistribute static metric-type 1 subnetsexit  ip route 4.4.4.0 255.255.255.0 f0/0end

R4配置

enconf thostname R4 int f0/0ip address 202.168.1.2 255.255.255.0no shutdownexit int loopback 0ip address 4.4.4.4 255.255.255.0no shutdownexit ip route 0.0.0.0 0.0.0.0 f0/0end

R2#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 6 0x80000004 0x00410e 2

1.1.1.1 1.1.1.1 6 0x80000003 0x00500e 2

Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum

192.168.1.2 2.2.2.2 6 0x80000001 0x00741f

Summary Net Link States (Area0)

Link ID ADV Router Age Seq# Checksum

192.168.2.0 2.2.2.2 1 0x80000001 0x008f5b

Router Link States (Area 1)

Link ID ADV Router Age Seq# Checksum Link count

2.2.2.2 2.2.2.2 6 0x80000002 0x005d0c 1

3.3.3.3 3.3.3.3 6 0x80000003 0x004af6 2

Net Link States (Area 1)

Link ID ADV Router Age Seq# Checksum

192.168.2.2 3.3.3.3 6 0x80000001 0x007f07

Summary Net Link States (Area1)

Link ID ADV Router Age Seq# Checksum

192.168.1.0 2.2.2.2 1 0x80000001 0x009a51

2.2.2.2 2.2.2.2 1 0x80000002 0x00f854

1.1.1.1 2.2.2.2 1 0x80000003 0x002f20

Type-5 AS External Link States

Link ID ADV Router Age Seq# Checksum Tag

4.4.4.0 3.3.3.3 50 0x80000001 0x005bcd 0

解释：外部路由通过LSA5传送到各个路由器。

R2#show ip route

Codes: C - connected, S - static, I - IGRP,R - RIP, M - mobile, B - BGP

D - EIGRP, EX -EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 -OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPFexternal type 2, E - EGP

i - IS-IS, L1 -IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

O 1.1.1.1 [110/2] via 192.168.1.1, 00:00:08, FastEthernet0/0

2.0.0.0/24 is subnetted, 1 subnets

C 2.2.2.0 is directly connected, Loopback0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/2] via 192.168.2.2, 00:00:03, FastEthernet0/1

4.0.0.0/24 is subnetted, 1 subnets

O E1 4.4.4.0 [110/21] via 192.168.2.2, 00:00:03, FastEthernet0/1

C 192.168.1.0/24 is directly connected, FastEthernet0/0

C 192.168.2.0/24 is directly connected, FastEthernet0/1

解释：OE1表示外部路由，路由重分布到本区域。

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