MPLS ××× OPTION B配置講解<?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /> ? ?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> ? 一般資料介紹跨域MPLS/××× OPTION_B時，采用兩個AS，為加深理解，本例采用三個AS，其中中間AS300為傳送AS，不啟MPLS標簽交換，只通過MP—EBGP傳送×××V4的私網路由。實驗中模擬路由器均采用Cisco 7206。

數據規劃：

1、????????????? 設備互聯：

Router1 S1/0 <----> Router2 S1/0

Router<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />2 F0/0 <----> Router3 F0/0

Router3 S1/1 <----> Router4 S1/1

Router4 F0/0 <----> Router5 F0/0

Router5 S1/1 <----> Router6 S1/1

2、????????????? 地址規劃：設備互連地址10.10.XY.X/24（R1中X=1,R1與R2互聯Y=2，其余類推）。

????????? Loopback 0 地址為：X.X.X.X/32

????????? ×××地址：

R1中***a：172.16.1.1/24

????? ***b: 192.168.1.1/24

R6中***a：172.16.2.1/24

????? ***b: 192.168.2.1/24

3、????????????? ×××規劃：在R1和R6中采用loopback 11 /loopback22模擬×××A和×××B,簡化了PE—CE間配置。

????????? ×××A: RD? 100:10

?????????????? ROUTE-TARGET 100:10

????????? ×××B: RD? 100:20

?????????????? ROUTE-TARGET 100:20

4、????????????? IGP路由協議：AS120采用OSPF，AS456采用ISIS。

?

?

配置基本思路：

1、在完成IGP等基本配置后，在所有PE設備和P設備上啟用IP? CEF。

2、?在所有PE設備和P設備上啟用MPLS? IP。

3、??AS120/AS456中PE和ASBR建立BGP鄰居關系。

4、???PE中創建×××，并在PE—CE間接口使能VRF? FORWARDING。

5、PE中BGP? IPV4? VRF 地址族中發布×××路由。

6、AS120/AS456中PE和ASBR建立BGP? ×××V4鄰居關系，交換×××路由信息。

7、AS120/AS456中ASBR分別和傳送區域AS300中ASBR建立×××V4鄰居關系，傳送×××V4路由。（注意：AS300中的R3與R1或R6之間并沒有IPV4的路由，在由R2和R4向R3發送×××路由時，必須把收到的R1和R6 的×××路由的下一跳強制指向自己，使用next-hop self命令，否則R3會認為該路由不可達，從而丟棄。）

8、要允許的ASBR接受所有的×××V4前綴，必須禁用缺省的ARF?？梢酝ㄟ^在所有的×××V4? ASBR上配置no bgp default route-target filter來完成。 ? ? 配置腳本如下： R1#show run
Building configuration... Current configuration : 1985 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
ip vrf ***a
?rd 100:10
?route-target export 100:10
?route-target import 100:10
!
ip vrf ***b
?rd 100:20
?route-target export 100:20
?route-target import 100:20
!
mpls label range 100 199
mpls label protocol ldp
tag-switching tdp router-id Loopback0 force
!
!
!
interface Loopback0
?ip address 1.1.1.1 255.255.255.255
?no ip directed-broadcast
!
interface Loopback11
?ip vrf forwarding ***a
?ip address 172.16.1.1 255.255.255.0
?no ip directed-broadcast
!
interface Loopback22
?ip vrf forwarding ***b
?ip address 192.168.1.1 255.255.255.0
?no ip directed-broadcast
!
interface FastEthernet0/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/0
?ip address 10.10.12.1 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/1
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router ospf 1
?log-adjacency-changes
?passive-interface Loopback0
?network 1.1.1.1 0.0.0.0 area 0
?network 10.10.12.0 0.0.0.255 area 0
!
router bgp 120
?no synchronization
?bgp router-id 1.1.1.1
?bgp log-neighbor-changes
?neighbor 2.2.2.2 remote-as 120
?neighbor 2.2.2.2 update-source Loopback0
?neighbor 2.2.2.2 send-label explicit-null
?no auto-summary
?!
?address-family ***v4
?neighbor 2.2.2.2 activate
?neighbor 2.2.2.2 send-community extended
?exit-address-family
?!???????
?address-family ipv4 vrf ***b
?redistribute connected
?no auto-summary
?no synchronization
?exit-address-family
?!
?address-family ipv4 vrf ***a
?redistribute connected
?no auto-summary
?no synchronization
?exit-address-family
!
ip classless
!
!
!
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end R1#
R2>en
R2#show run
Building configuration... Current configuration : 1540 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
mpls label range 200 299
mpls label protocol ldp
tag-switching tdp router-id Loopback0 force
!
!
!????????
interface Loopback0
?ip address 2.2.2.2 255.255.255.255
?no ip directed-broadcast
!
interface FastEthernet0/0
?ip address 10.10.23.2 255.255.255.0
?no ip directed-broadcast
?mpls bgp forwarding
!
interface Serial1/0
?ip address 10.10.12.2 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/1
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router ospf 1
?log-adjacency-changes
?passive-interface Loopback0
?network 2.2.2.2 0.0.0.0 area 0
?network 10.10.12.0 0.0.0.255 area 0
!
router bgp 120
?no synchronization
?bgp router-id 2.2.2.2
?no bgp default route-target filter
?bgp log-neighbor-changes
?neighbor 1.1.1.1 remote-as 120
?neighbor 1.1.1.1 update-source Loopback0
?neighbor 10.10.23.3 remote-as 300
?no auto-summary
?!
?address-family ***v4
?neighbor 1.1.1.1 activate
?neighbor 1.1.1.1 send-community extended
?neighbor 1.1.1.1 next-hop-self
?neighbor 10.10.23.3 activate
?neighbor 10.10.23.3 send-community extended
?exit-address-family
!
ip classless
!
!
!
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end?????? R2# R3#show run
Building configuration... Current configuration : 1245 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
no tag-switching ip
!
!
!
interface Loopback0
?ip address 3.3.3.3 255.255.255.255
?no ip directed-broadcast
!
interface FastEthernet0/0
?ip address 10.10.23.3 255.255.255.0
?no ip directed-broadcast
?mpls bgp forwarding
!
interface Serial1/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/1
?ip address 10.10.34.3 255.255.255.0
?no ip directed-broadcast
?mpls bgp forwarding
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router bgp 300
?no synchronization
?no bgp default route-target filter
?bgp log-neighbor-changes
?neighbor 10.10.23.2 remote-as 120
?neighbor 10.10.34.4 remote-as 456
?no auto-summary
?!
?address-family ***v4
?neighbor 10.10.23.2 activate
?neighbor 10.10.23.2 send-community extended
?neighbor 10.10.34.4 activate
?neighbor 10.10.34.4 send-community extended
?exit-address-family
!
ip classless
!
!
!????????
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end R3# R4#show run
Building configuration... Current configuration : 1517 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
mpls label range 400 499
mpls label protocol ldp
tag-switching tdp router-id Loopback0 force
!
!
!????????
interface Loopback0
?ip address 4.4.4.4 255.255.255.255
?no ip directed-broadcast
!
interface FastEthernet0/0
?ip address 10.10.45.4 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/1
?ip address 10.10.34.4 255.255.255.0
?no ip directed-broadcast
?mpls bgp forwarding
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router ospf 1
?log-adjacency-changes
?passive-interface Loopback0
?network 4.4.4.4 0.0.0.0 area 0
?network 10.10.45.0 0.0.0.255 area 0
!
router bgp 456
?no synchronization
?no bgp default route-target filter
?bgp log-neighbor-changes
?neighbor 6.6.6.6 remote-as 456
?neighbor 6.6.6.6 update-source Loopback0
?neighbor 10.10.34.3 remote-as 300
?no auto-summary
?!
?address-family ***v4
?neighbor 6.6.6.6 activate
?neighbor 6.6.6.6 send-community extended
?neighbor 6.6.6.6 next-hop-self
?neighbor 10.10.34.3 activate
?neighbor 10.10.34.3 send-community extended
?exit-address-family
!
ip classless
!
!
!
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end
?????????
R4#
R5#show run
Building configuration... Current configuration : 1098 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R5
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
mpls label range 500 599
mpls label protocol ldp
tag-switching tdp router-id Loopback0
!
!
!????????
interface Loopback0
?ip address 5.5.5.5 255.255.255.255
?no ip directed-broadcast
!
interface FastEthernet0/0
?ip address 10.10.45.5 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/1
?ip address 10.10.56.5 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router ospf 1
?log-adjacency-changes
?passive-interface Loopback0
?network 5.5.5.5 0.0.0.0 area 0
?network 10.10.45.0 0.0.0.255 area 0
?network 10.10.56.0 0.0.0.255 area 0
!
ip classless
!
!
!
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end R5#?????? R6#show run
Building configuration... Current configuration : 1962 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R6
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
ip vrf ***a
?rd 100:10
?route-target export 100:10
?route-target import 100:10
!
ip vrf ***b
?rd 100:20
?route-target export 100:20
?route-target import 100:20
!
mpls label range 600 699
mpls label protocol ldp
tag-switching tdp router-id Loopback0 force
!
!
!
interface Loopback0
?ip address 6.6.6.6 255.255.255.255
?no ip directed-broadcast
!
interface Loopback11
?ip vrf forwarding ***a
?ip address 172.16.2.1 255.255.255.0
?no ip directed-broadcast
!
interface Loopback22
?ip vrf forwarding ***b
?ip address 192.168.2.1 255.255.255.0
?no ip directed-broadcast
!
interface FastEthernet0/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/1
?ip address 10.10.56.6 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router ospf 1
?log-adjacency-changes
?passive-interface Loopback0
?network 6.6.6.6 0.0.0.0 area 0
?network 10.10.56.0 0.0.0.255 area 0
!
router bgp 456
?no synchronization
?bgp log-neighbor-changes
?neighbor 4.4.4.4 remote-as 456
?neighbor 4.4.4.4 update-source Loopback0
?neighbor 4.4.4.4 send-label explicit-null
?no auto-summary
?!
?address-family ***v4
?neighbor 4.4.4.4 activate
?neighbor 4.4.4.4 send-community extended
?exit-address-family
?!
?address-family ipv4 vrf ***b
?redistribute connected
?no auto-summary
?no synchronization
?exit-address-family
?!
?address-family ipv4 vrf ***a
?redistribute connected
?no auto-summary
?no synchronization
?exit-address-family
!
ip classless
!
!
!
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end R6#??????????? show run
Building configuration... Current configuration : 1962 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R6
!
boot-start-marker
boot-end-marker
!
!
ip subnet-zero
!
!
ip cef
ip vrf ***a
?rd 100:10
?route-target export 100:10
?route-target import 100:10
!
ip vrf ***b
?rd 100:20
?route-target export 100:20
?route-target import 100:20
!
mpls label range 600 699
mpls label protocol ldp
tag-switching tdp router-id Loopback0 force
!
!
!
interface Loopback0
?ip address 6.6.6.6 255.255.255.255
?no ip directed-broadcast
!
interface Loopback11
?ip vrf forwarding ***a
?ip address 172.16.2.1 255.255.255.0
?no ip directed-broadcast
!
interface Loopback22
?ip vrf forwarding ***b
?ip address 192.168.2.1 255.255.255.0
?no ip directed-broadcast
!
interface FastEthernet0/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/0
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/1
?ip address 10.10.56.6 255.255.255.0
?no ip directed-broadcast
?tag-switching ip
!
interface Serial1/2
?no ip address
?no ip directed-broadcast
?shutdown
!
interface Serial1/3
?no ip address
?no ip directed-broadcast
?shutdown
!
router ospf 1
?log-adjacency-changes
?passive-interface Loopback0
?network 6.6.6.6 0.0.0.0 area 0
?network 10.10.56.0 0.0.0.255 area 0
!
router bgp 456
?no synchronization
?bgp log-neighbor-changes
?neighbor 4.4.4.4 remote-as 456
?neighbor 4.4.4.4 update-source Loopback0
?neighbor 4.4.4.4 send-label explicit-null
?no auto-summary
?!
?address-family ***v4
?neighbor 4.4.4.4 activate
?neighbor 4.4.4.4 send-community extended
?exit-address-family
?!
?address-family ipv4 vrf ***b
?redistribute connected
?no auto-summary
?no synchronization
?exit-address-family
?!
?address-family ipv4 vrf ***a
?redistribute connected
?no auto-summary
?no synchronization
?exit-address-family
!
ip classless
!
!
!
control-plane
!
!
line con 0
?stopbits 1
line aux 0
?stopbits 1
line vty 0 4
?login
!
no cns aaa enable
end R6#????????

本文出自 “飄雪不言緣之網絡技術博客” 博客，請務必保留此出處http://kingtang.blog.51cto.com/153802/133428

轉載于:https://blog.51cto.com/235898457/322853

創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

總結

以上是生活随笔為你收集整理的MPLS ×××跨域实现之OPTION B配置讲解的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。