OSPF0.1

基于第二张图片配置

了解LSA

查看路由表: show ip route ospf

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基于第二张图片配置

R1：
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.0
!
interface Serial0/0/0
 ip address 192.168.1.1 255.255.255.0
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 area 1 nssa
 redistribute connected subnets 
 network 192.168.1.0 0.0.0.255 area 1
!

R2：
!
interface Serial0/0/0
 ip address 192.168.1.2 255.255.255.0
!
interface Serial0/0/1
 ip address 10.1.1.1 255.255.255.252
 clock rate 2000000
!
interface Serial0/1/0
 ip address 10.1.4.1 255.255.255.252
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 area 1 nssa
 network 192.168.1.0 0.0.0.255 area 1
 network 10.1.4.0 0.0.0.3 area 0
 network 10.1.1.0 0.0.0.3 area 0
!

R3：
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 192.168.2.2 255.255.255.0
!
interface Serial0/0/1
 ip address 10.1.3.1 255.255.255.252
!
interface Serial0/1/0
 ip address 10.1.4.2 255.255.255.252
!
router ospf 1
 log-adjacency-changes
 area 2 nssa no-summary
 network 10.1.4.0 0.0.0.3 area 0
 network 10.1.3.0 0.0.0.3 area 0
 network 192.168.2.0 0.0.0.255 area 2
!

R4：
!
interface Serial0/0/0
 ip address 10.1.2.2 255.255.255.252
!
interface Serial0/0/1
 ip address 10.1.3.2 255.255.255.252
 clock rate 2000000
!
interface Serial0/1/0
 ip address 192.168.3.2 255.255.255.0
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 area 3 stub no-summary
 network 10.1.2.0 0.0.0.3 area 0
 network 10.1.3.0 0.0.0.3 area 0
 network 192.168.3.0 0.0.0.255 area 3
!

R5：
!
interface Serial0/0/0
 ip address 10.1.1.2 255.255.255.252
!
interface Serial0/0/1
 ip address 10.1.2.1 255.255.255.252
 clock rate 2000000
!
interface Serial0/1/0
 ip address 192.168.4.2 255.255.255.0
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 area 4 stub
 network 10.1.1.0 0.0.0.3 area 0
 network 10.1.2.0 0.0.0.3 area 0
 network 192.168.4.0 0.0.0.255 area 4
!

R6：
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.0
!
interface Serial0/0/0
 ip address 192.168.2.1 255.255.255.0
 clock rate 2000000
!
router ospf 1
 log-adjacency-changes
 area 2 nssa
 redistribute connected subnets 
 network 192.168.2.0 0.0.0.255 area 2
!

R7：
!
interface Serial0/0/0
 ip address 192.168.4.1 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 area 4 stub
 network 192.168.4.0 0.0.0.255 area 4
!

R8：
!
interface Serial0/0/0
 ip address 192.168.3.1 255.255.255.0
!
router ospf 1
 log-adjacency-changes
 area 3 stub
 network 192.168.3.0 0.0.0.255 area 3
!

了解LSA

LSA类型代码	描述
1	路由器LSA
2	网络LSA
3	网络汇总LSA
4	ASBR汇总LSA
5	AS外部LSA
6	组成员LSA
7	NSSA外部LSA

lsa_百度百科 (baidu.com)https://baike.baidu.com/item/lsa/8860267?fr=aladdin

查看路由表: show ip route ospf

路由指示符	路由类型
O	OSPF区域内路由
O IA	OSPF区域间路由
O E1	1类外部路由
O E2	2类外部路由

OE1、OE2、ON1、ON2路由区别 - 百度文库 (baidu.com)https://wenku.baidu.com/view/bf2b9b25dd80d4d8d15abe23482fb4daa58d1df3.html?_wkts_=1681533421228&bdQuery=oe1%E5%92%8Coe2%E7%9A%84%E5%8C%BA%E5%88%AB

OSPF区域内可能存在的LSA类型

骨干区域	1、2、3、4、5
标准区域	1、2、3、4、5
stub区域	1、2、3、3类默认
完全stub区域	1、2、3类默认
nssa区域	1、2、3、7
完全nssa区域	1、2、7、3类默认

Virtual-link配置

R0：
router ospf 1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.255 area 2

R1：
router ospf 1
 log-adjacency-changes
 area 1 virtual-link 3.3.3.3
 network 192.168.1.0 0.0.0.255 area 2
 network 192.168.2.0 0.0.0.255 area 1

R2:
router ospf 1
 log-adjacency-changes
 area 1 virtual-link 2.2.2.2
 network 192.168.2.0 0.0.0.255 area 1
 network 192.168.3.0 0.0.0.255 area 0

R3：
router ospf 1
 log-adjacency-changes
 network 192.168.3.0 0.0.0.255 area 0

//R1路由表
     1.0.0.0/32 is subnetted, 1 subnets
C       1.1.1.1/32 is directly connected, Loopback0
     192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C       192.168.1.0/24 is directly connected, GigabitEthernet0/0
L       192.168.1.1/32 is directly connected, GigabitEthernet0/0
O IA 192.168.2.0/24 [110/2] via 192.168.1.2, 00:16:49, GigabitEthernet0/0    //2.0、3.0都来了
O IA 192.168.3.0/24 [110/3] via 192.168.1.2, 00:03:08, GigabitEthernet0/0

身份验证

接口验证

明文：
Router(config-if)#ip ospf authentication-key password
Router(config-if)#ip ospf authentication

密文：
Router(config-if)#ip ospf message-digest-key keyID md5 password
Router(config-if)#ip ospf authentication message-digest

区域验证

路由汇总

R0：
router ospf 1
 log-adjacency-changes
 redistribute connected subnets 
 network 192.168.1.0 0.0.0.255 area 1

R1：
router ospf 1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.255 area 1
 network 192.168.2.0 0.0.0.255 area 0

R2：
router ospf 1
 log-adjacency-changes
 network 192.168.2.0 0.0.0.255 area 0
 network 192.168.3.0 0.0.0.255 area 2

R3：
router ospf 1
 log-adjacency-changes
 network 192.168.3.0 0.0.0.255 area 2

//可以看到R3的路由表太多了
O E2    10.1.1.0/24 [110/20] via 192.168.3.1, 00:00:59, GigabitEthernet0/0
O E2    10.1.2.0/24 [110/20] via 192.168.3.1, 00:00:59, GigabitEthernet0/0
O E2    10.1.3.0/24 [110/20] via 192.168.3.1, 00:00:39, GigabitEthernet0/0

//汇总一下
R0：
router ospf 1
summary-address 10.1.0.0 255.255.0.0

********************************************
********************************************

//还有一种ABR汇总
R0：
Router(config-router)#net 10.1.1.0 0.0.0.255 a 1 
Router(config-router)#net 10.1.2.0 0.0.0.255 a 1 
Router(config-router)#net 10.1.3.0 0.0.0.255 a 1 
//R3可以看到
O IA    10.1.1.1/32 [110/4] via 192.168.3.1, 00:01:23, GigabitEthernet0/0
O IA    10.1.2.1/32 [110/4] via 192.168.3.1, 00:01:23, GigabitEthernet0/0
O IA    10.1.3.1/32 [110/4] via 192.168.3.1, 00:01:23, GigabitEthernet0/0
//汇总一下
R1：
Router(config-router)#area 1 range 10.1.0.0 255.255.0.0
//R3上可以看到
O IA    10.1.0.0/16 [110/4] via 192.168.3.1, 00:01:03, GigabitEthernet0/0

基于第二张图片配置

了解LSA

查看路由表: show ip route ospf

OSPF区域内可能存在的LSA类型

Virtual-link配置

身份验证

接口验证

区域验证

路由汇总

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