今天复习了CCNP中的IS-IS章节，了解了概念之后最重要的还是动手实验了。在实验中体会所学的知识点是如何运用的是最重要的。学CISCO这么久，老是感觉自己的记性一日不如一日，不过没办法，不学习的话要实现IE梦想那真就成了天方夜谭了，给自己加油，兄弟们也一起啊！
首先看看这张实验拓扑图:
配置的步骤如下：
1.在路由器上启用ISIS路由协议。 命令router isis
2.配置路由器的NET地址。 格式为： NET 49.YYYY.XXXX.XXXX.XXXX.00,其中49表示本地管理（私有的意思），YYYY表示区域地址，XXXX.XXXX.XXXX表示系统地址，00是NESL字节，其等于0表示网络服务。
3.配置路由器的IS-IS类别。在ISIS协议配置模式下，IS-TYPE LEVEL-1/1-2/-2。
4.配置ISIS接口级别。在接口配置模式下：ISIS CIRCUIT-TYPE LEVEL-1/-2/-1-2。
5.在接口启动集成IS-IS。以便分发IP信息。
6.如有必要，对ISIS分发的路由信息进行汇总。（在LEVEL-1-2的路由器上进行，就像在OSPF的ABR路由器上进行汇总的理由一样。）SUMMARY ADDRESS A.B.C.D MASK
7.验证配置。show ip route , sh isis neighbour ,sh clns neighbour ,sh isis topology.
好了，来看一下具体配置吧：
——路由器R1的配置：
R1#sh run
Building configuration...
Building configuration...
Current configuration : 1289 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Loopback0
ip address 192.168.1.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback1
ip address 192.168.2.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback2
ip address 192.168.3.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback3
ip address 192.168.4.1 255.255.255.0
ip router isis 在接口上启用CLNS路由功能。
isis circuit-type level-1
!
interface Serial0/0
ip address 10.1.0.1 255.255.255.252
ip router isis
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Loopback0
ip address 192.168.1.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback1
ip address 192.168.2.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback2
ip address 192.168.3.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback3
ip address 192.168.4.1 255.255.255.0
ip router isis 在接口上启用CLNS路由功能。
isis circuit-type level-1
!
interface Serial0/0
ip address 10.1.0.1 255.255.255.252
ip router isis
clns router isis
serial restart-delay 0
isis circuit-type level-1
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0001.1111.1111.1111.00
is-type level-1
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
serial restart-delay 0
isis circuit-type level-1
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0001.1111.1111.1111.00
is-type level-1
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
路由器R2的配置：
R2#sh run
Building configuration...
R2#sh run
Building configuration...
Current configuration : 958 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Serial0/0
ip address 10.1.0.2 255.255.255.252
ip router isis
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Serial0/0
ip address 10.1.0.2 255.255.255.252
ip router isis
clns router isis
serial restart-delay 0
isis circuit-type level-1
!
interface Serial0/1
ip address 10.2.0.1 255.255.255.252
ip router isis
serial restart-delay 0
isis circuit-type level-1
!
interface Serial0/1
ip address 10.2.0.1 255.255.255.252
ip router isis
clns router isis
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0001.2222.2222.2222.00
summary-address 192.168.0.0 255.255.0.0 实现路由汇总
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0001.2222.2222.2222.00
summary-address 192.168.0.0 255.255.0.0 实现路由汇总
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
路由器R3的配置：
R3#sh run
Building configuration...
Building configuration...
Current configuration : 944 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Serial0/0
ip address 10.2.0.2 255.255.255.252
ip router isis
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Serial0/0
ip address 10.2.0.2 255.255.255.252
ip router isis
clns router isis
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/1
ip address 10.3.0.1 255.255.255.252
ip router isis
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/1
ip address 10.3.0.1 255.255.255.252
ip router isis
clns router isis
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0020.3333.3333.3333.00
is-type level-2-only
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0020.3333.3333.3333.00
is-type level-2-only
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
路由器R4的配置：
R4#sh run
Building configuration...
R4#sh run
Building configuration...
Current configuration : 1202 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Loopback0
ip address 20.0.0.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback1
ip address 20.0.1.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback2
ip address 20.0.2.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Serial0/0
ip address 10.3.0.2 255.255.255.252
ip router isis
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
no ftp-server write-enable
!
!
!
!
interface Loopback0
ip address 20.0.0.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback1
ip address 20.0.1.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Loopback2
ip address 20.0.2.1 255.255.255.0
ip router isis
isis circuit-type level-1
!
interface Serial0/0
ip address 10.3.0.2 255.255.255.252
ip router isis
clns router isis
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0002.4444.4444.4444.00
summary-address 20.0.0.0 255.255.0.0 实现路由汇总
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
serial restart-delay 0
isis circuit-type level-2-only
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router isis
net 49.0002.4444.4444.4444.00
summary-address 20.0.0.0 255.255.0.0 实现路由汇总
!
ip http server
ip classless
!
!
!
!
!
control-plane
!
!
line con 0
transport preferred all
transport output all
line aux 0
transport preferred all
transport output all
line vty 0 4
!
end
所有配置都已结束，下面进行验证：
使用SH CLNS ROUTE观察CLNS路由情况：
路由器R1：
R1#sh clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0001.1111.1111.1111.00 [1/0], Local IS-IS NET
C 49.0001 [2/0], Local IS-IS Area
C 49.0001 [2/0], Local IS-IS Area
路由器R2:
R2#sh clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0001.2222.2222.2222.00 [1/0], Local IS-IS NET
C 49.0001 [2/0], Local IS-IS Area
C 49.0001 [2/0], Local IS-IS Area
i 49.0002 [110/20]
via R3, Serial0/1
i 49.0020 [110/10]
via R3, Serial0/1
via R3, Serial0/1
i 49.0020 [110/10]
via R3, Serial0/1
路由器R3：
R3#sh clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0020.3333.3333.3333.00 [1/0], Local IS-IS NET
C 49.0020 [2/0], Local IS-IS Area
C 49.0020 [2/0], Local IS-IS Area
i 49.0001 [110/10]
via R2, Serial0/0
i 49.0002 [110/10]
via R4, Serial0/1
via R2, Serial0/0
i 49.0002 [110/10]
via R4, Serial0/1
路由器R4:
R4#sh clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0002.4444.4444.4444.00 [1/0], Local IS-IS NET
C 49.0002 [2/0], Local IS-IS Area
C 49.0002 [2/0], Local IS-IS Area
i 49.0001 [110/20]
via R3, Serial0/0
i 49.0020 [110/10]
via R3, Serial0/0
via R3, Serial0/0
i 49.0020 [110/10]
via R3, Serial0/0
看一下路由汇总的效果吧：
路由器R2为LEVEL-1-2的类型，再汇总中我们只对L2进行了汇总
R2#sh 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
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
20.0.0.0/16 is subnetted, 1 subnets
i L2 20.0.0.0 [115/30] via 10.2.0.2, Serial0/1
i L1 192.168.4.0/24 [115/20] via 10.1.0.1, Serial0/0
10.0.0.0/30 is subnetted, 3 subnets
C 10.2.0.0 is directly connected, Serial0/1
i L2 10.3.0.0 [115/20] via 10.2.0.2, Serial0/1
C 10.1.0.0 is directly connected, Serial0/0
i L1 192.168.1.0/24 [115/20] via 10.1.0.1, Serial0/0
i L1 192.168.2.0/24 [115/20] via 10.1.0.1, Serial0/0
i L1 192.168.3.0/24 [115/20] via 10.1.0.1, Serial0/0
i su 192.168.0.0/16 [115/20] via 0.0.0.0, Null0
i L2 20.0.0.0 [115/30] via 10.2.0.2, Serial0/1
i L1 192.168.4.0/24 [115/20] via 10.1.0.1, Serial0/0
10.0.0.0/30 is subnetted, 3 subnets
C 10.2.0.0 is directly connected, Serial0/1
i L2 10.3.0.0 [115/20] via 10.2.0.2, Serial0/1
C 10.1.0.0 is directly connected, Serial0/0
i L1 192.168.1.0/24 [115/20] via 10.1.0.1, Serial0/0
i L1 192.168.2.0/24 [115/20] via 10.1.0.1, Serial0/0
i L1 192.168.3.0/24 [115/20] via 10.1.0.1, Serial0/0
i su 192.168.0.0/16 [115/20] via 0.0.0.0, Null0
路由器R4：
R4#sh 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
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
20.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 20.0.0.0/24 is directly connected, Loopback0
i su 20.0.0.0/16 [115/10] via 0.0.0.0, Null0
C 20.0.1.0/24 is directly connected, Loopback1
C 20.0.2.0/24 is directly connected, Loopback2
10.0.0.0/30 is subnetted, 3 subnets
i L2 10.2.0.0 [115/20] via 10.3.0.1, Serial0/0
C 10.3.0.0 is directly connected, Serial0/0
i L2 10.1.0.0 [115/30] via 10.3.0.1, Serial0/0
i L2 192.168.0.0/16 [115/40] via 10.3.0.1, Serial0/0
C 20.0.0.0/24 is directly connected, Loopback0
i su 20.0.0.0/16 [115/10] via 0.0.0.0, Null0
C 20.0.1.0/24 is directly connected, Loopback1
C 20.0.2.0/24 is directly connected, Loopback2
10.0.0.0/30 is subnetted, 3 subnets
i L2 10.2.0.0 [115/20] via 10.3.0.1, Serial0/0
C 10.3.0.0 is directly connected, Serial0/0
i L2 10.1.0.0 [115/30] via 10.3.0.1, Serial0/0
i L2 192.168.0.0/16 [115/40] via 10.3.0.1, Serial0/0
观察ISIS邻居状况：
路由器R1:
R1#sh isis neighbors detail
System Id Type Interface IP Address State Holdtime Circuit Id
R2 L1 Se0/0 10.1.0.2 UP 27 00
Area Address(es): 49.0001
SNPA: *HDLC*
State Changed: 01:04:16
Format: Phase V
R2 L1 Se0/0 10.1.0.2 UP 27 00
Area Address(es): 49.0001
SNPA: *HDLC*
State Changed: 01:04:16
Format: Phase V
路由器R2:
R2#SH ISIS NEIghbors DETail
System Id Type Interface IP Address State Holdtime Circuit Id
R1 L1 Se0/0 10.1.0.1 UP 28 00
Area Address(es): 49.0001
SNPA: *HDLC*
State Changed: 01:05:00
Format: Phase V
R3 L2 Se0/1 10.2.0.2 UP 24 00
Area Address(es): 49.0020
SNPA: *HDLC*
State Changed: 01:04:29
Format: Phase V
R1 L1 Se0/0 10.1.0.1 UP 28 00
Area Address(es): 49.0001
SNPA: *HDLC*
State Changed: 01:05:00
Format: Phase V
R3 L2 Se0/1 10.2.0.2 UP 24 00
Area Address(es): 49.0020
SNPA: *HDLC*
State Changed: 01:04:29
Format: Phase V
路由器R3
R3#SH ISIS NEIghbors DETail
System Id Type Interface IP Address State Holdtime Circuit Id
R2 L2 Se0/0 10.2.0.1 UP 28 01
Area Address(es): 49.0001
SNPA: *HDLC*
State Changed: 01:05:03
Format: Phase V
R4 L2 Se0/1 10.3.0.2 UP 27 00
Area Address(es): 49.0002
SNPA: *HDLC*
State Changed: 01:04:35
Format: Phase V
R2 L2 Se0/0 10.2.0.1 UP 28 01
Area Address(es): 49.0001
SNPA: *HDLC*
State Changed: 01:05:03
Format: Phase V
R4 L2 Se0/1 10.3.0.2 UP 27 00
Area Address(es): 49.0002
SNPA: *HDLC*
State Changed: 01:04:35
Format: Phase V
路由器R4:
R4#SH ISIS NEIghbors DETail
System Id Type Interface IP Address State Holdtime Circuit Id
R3 L2 Se0/0 10.3.0.1 UP 29 01
Area Address(es): 49.0020
SNPA: *HDLC*
State Changed: 01:05:02
Format: Phase V
R3 L2 Se0/0 10.3.0.1 UP 29 01
Area Address(es): 49.0020
SNPA: *HDLC*
State Changed: 01:05:02
Format: Phase V
实验就做到这里吧。
欢迎大家光临我的博客！
本文转自 tiger506 51CTO博客，原文链接：http://blog.51cto.com/tiger506/105142，如需转载请自行联系原作者
