CCNA课程实验3

总结一下昨天学到的东西，防止忘了！

大概是几种路由的方式：有静态路由，RIP路由，EIGRP路由.

其中RIP路由又包括version 1 & version 2（默认是version 1，如果写version 2 一般还会加上no-auto summary）

 

RIP路由 不能超过16个跳点

基本命令：

 router rip

network 192.168.12.0             //地址写的是网段地址

 

本身rip是自动归类的（version1）.

如果想实现不自动归类，需要做如下设置

 

version 2
no auto-summary

EIGRP路由

router eigrp 进程号(0-65535)

network  网络号 子网掩码的反码

如：

router eigrp 100

network 192.168.1.0 0.0.0.255

几点注意：如果要实现网络互通，进程号必须要相同

 

A. 只用rip路由的话，用show ip route 查看路由表是这样的

R1：

R1#show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

C    192.168.12.0/24 is directly connected, Ethernet0/1
     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Loopback0
R    2.0.0.0/8 [120/1] via 192.168.12.2, 00:00:23, Ethernet0/1
R    3.0.0.0/8 [120/2] via 192.168.12.2, 00:00:23, Ethernet0/1
R    192.168.23.0/24 [120/1] via 192.168.12.2, 00:00:23, Ethernet0/1

 

R2：

R2#show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

C    192.168.12.0/24 is directly connected, Ethernet0/0
R    1.0.0.0/8 [120/1] via 192.168.12.1, 00:00:01, Ethernet0/0
     2.0.0.0/24 is subnetted, 1 subnets
C       2.2.2.0 is directly connected, Loopback0
R    3.0.0.0/8 [120/1] via 192.168.23.3, 00:00:14, Ethernet0/1
C    192.168.23.0/24 is directly connected, Ethernet0/1

 

R3：

 R3#show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

R    192.168.12.0/24 [120/1] via 192.168.23.2, 00:00:21, Ethernet0/0
R    1.0.0.0/8 [120/2] via 192.168.23.2, 00:00:21, Ethernet0/0
R    2.0.0.0/8 [120/1] via 192.168.23.2, 00:00:21, Ethernet0/0
     3.0.0.0/24 is subnetted, 1 subnets
C       3.3.3.0 is directly connected, Loopback0
C    192.168.23.0/24 is directly connected, Ethernet0/0

 其中[]里面，/前面表示的是管理距离，越小越优先

/后面的表示的是跳数，表示经过几跳能到达目的地.

 

 

B.如果加入静态路由的话

R1：

R1#show ip rou
*Mar  1 01:02:55.583: %SYS-5-CONFIG_I: Configured from console by consolete
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

C    192.168.12.0/24 is directly connected, Ethernet0/1
     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Loopback0
     2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S       2.2.2.0/24 [1/0] via 192.168.12.2
R       2.0.0.0/8 [120/1] via 192.168.12.2, 00:00:22, Ethernet0/1
     3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S       3.3.3.0/24 [1/0] via 192.168.12.2
R       3.0.0.0/8 [120/2] via 192.168.12.2, 00:00:22, Ethernet0/1
S    192.168.23.0/24 [1/0] via 192.168.12.2

 

R2：

R2#show
*Mar  1 01:02:46.155: %SYS-5-CONFIG_I: Configured from console by consoleip rout
e
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

C    192.168.12.0/24 is directly connected, Ethernet0/0
     1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S       1.1.1.0/24 [1/0] via 192.168.12.1
R       1.0.0.0/8 [120/1] via 192.168.12.1, 00:00:25, Ethernet0/0
     2.0.0.0/24 is subnetted, 1 subnets
C       2.2.2.0 is directly connected, Loopback0
     3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S       3.3.3.0/24 [1/0] via 192.168.23.3
R       3.0.0.0/8 [120/1] via 192.168.23.3, 00:00:12, Ethernet0/1
C    192.168.23.0/24 is directly connected, Ethernet0/1

 

R3：

R3#show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

S    192.168.12.0/24 [1/0] via 192.168.23.2
     1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S       1.1.1.0/24 [1/0] via 192.168.23.2
R       1.0.0.0/8 [120/2] via 192.168.23.2, 00:00:07, Ethernet0/0
     2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S       2.2.2.0/24 [1/0] via 192.168.23.2
R       2.0.0.0/8 [120/1] via 192.168.23.2, 00:00:07, Ethernet0/0
     3.0.0.0/24 is subnetted, 1 subnets
C       3.3.3.0 is directly connected, Loopback0
C    192.168.23.0/24 is directly connected, Ethernet0/0

 

注意：之所以到达2.2.2.2的时候会有R，也有S是因为rip默认是归类的，他会把2.2.2.0 自动归类为a类，即2.0.0.0 /8,所以R到这的路由并没有被s替代.

 C.eigrp（Cisco路由器独有）

只用eigrp连通的话

R1:

!
router eigrp 100
 network 1.1.1.0 0.0.0.255
 network 192.168.12.0
 auto-summary
!

R2：

!
router eigrp 100
network 2.2.2.0 0.0.0.255
network 192.168.12.0
network 192.168.23.0
auto-summary
!

 R3：

!
router eigrp 100
 network 3.3.3.0 0.0.0.255
 network 192.168.23.0
 auto-summary
!

 如果使用show ip route 看的话

R1

r1(config-router)#do show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

C    192.168.12.0/24 is directly connected, Ethernet0/1
     1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       1.1.1.0/24 is directly connected, Loopback1
D       1.0.0.0/8 is a summary, 00:12:54, Null0
D    2.0.0.0/8 [90/409600] via 192.168.12.2, 00:11:20, Ethernet0/1
D    3.0.0.0/8 [90/435200] via 192.168.12.2, 00:10:29, Ethernet0/1
D    192.168.23.0/24 [90/307200] via 192.168.12.2, 00:11:31, Ethernet0/1

 

R2

 r2(config)#do show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

C    192.168.12.0/24 is directly connected, Ethernet0/0
D    1.0.0.0/8 [90/409600] via 192.168.12.1, 00:12:47, Ethernet0/0
     2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       2.2.2.0/24 is directly connected, Loopback1
D       2.0.0.0/8 is a summary, 00:12:05, Null0
D    3.0.0.0/8 [90/409600] via 192.168.23.3, 00:11:14, Ethernet0/1
C    192.168.23.0/24 is directly connected, Ethernet0/1

 

R3:

r3(config-router)#do show ip route
Codes: C - connected, S - static, 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 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, 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

D    192.168.12.0/24 [90/307200] via 192.168.23.2, 00:12:04, Ethernet0/0
D    1.0.0.0/8 [90/435200] via 192.168.23.2, 00:12:04, Ethernet0/0
D    2.0.0.0/8 [90/409600] via 192.168.23.2, 00:12:04, Ethernet0/0
     3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       3.3.3.0/24 is directly connected, Loopback1
D       3.0.0.0/8 is a summary, 00:11:42, Null0
C    192.168.23.0/24 is directly connected, Ethernet0/0

 如果再eigrp的基础上，加上rip路由的话，路由表不会改变，因为rip的优先级是120比eigrp低，同时对于1.1.1.1这类地址都会自动归类，所以eigrp还是会覆盖掉rip路由！

如果在此基础上再加上静态路由，则对于1.1.1.1这类地址既有静态也有eigrp存在,对于192.168.12.0这类网段只有静态存在！

 

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