今天復習了CCNP中的IS-IS章節，了解了概念之后最重要的還是動手實驗了。在實驗中體會所學的知識點是如何運用的是最重要的。學CISCO這么久，老是感覺自己的記性一日不如一日，不過沒辦法，不學習的話要實現IE夢想那真就成了天方夜譚了，給自己加油，兄弟們也一起啊！ 首先看看這張實驗拓撲圖: 配置的步驟如下： 1.在路由器上啟用ISIS路由協議。 命令router isis 2.配置路由器的NET地址。 格式為： NET 49.YYYY.XXXX.XXXX.XXXX.00,其中49表示本地管理（私有的意思），YYYY表示區域地址，XXXX.XXXX.XXXX表示系統地址，00是NESL字節，其等于0表示網絡服務。 3.配置路由器的IS-IS類別。在ISIS協議配置模式下，IS-TYPE LEVEL-1/1-2/-2。 4.配置ISIS接口級別。在接口配置模式下：ISIS CIRCUIT-TYPE LEVEL-1/-2/-1-2。 5.在接口啟動集成IS-IS。以便分發IP信息。 6.如有必要，對ISIS分發的路由信息進行匯總。（在LEVEL-1-2的路由器上進行，就像在OSPF的ABR路由器上進行匯總的理由一樣。）SUMMARY ADDRESS A.B.C.D MASK 7.驗證配置。show ip route , sh isis neighbour ,sh clns neighbour ,sh isis topology. 好了，來看一下具體配置吧： ——路由器R1的配置： R1#sh run
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?????在接口上啟用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 路由器R2的配置：
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? 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? 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???實現路由匯總
!
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... 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? 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? 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 路由器R4的配置：
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? 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??實現路由匯總
!
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
所有配置都已結束，下面進行驗證： 使用SH CLNS ROUTE觀察CLNS路由情況： 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 C? 49.0001.1111.1111.1111.00 [1/0], Local IS-IS NET
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 C? 49.0001.2222.2222.2222.00 [1/0], Local IS-IS NET
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 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 C? 49.0020.3333.3333.3333.00 [1/0], Local IS-IS NET
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 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 C? 49.0002.4444.4444.4444.00 [1/0], Local IS-IS NET
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 看一下路由匯總的效果吧： 路由器R2為LEVEL-1-2的類型，再匯總中我們只對L2進行了匯總 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 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 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 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 觀察ISIS鄰居狀況： 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 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 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 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 實驗就做到這里吧。 歡迎大家光臨我的博客！



本文轉自 tiger506 51CTO博客，原文鏈接：http://blog.51cto.com/tiger506/105142，如需轉載請自行聯系原作者
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