Mplsvpn跨域optionB第二种方式

1、实用文档Mpls vpn 跨域 optionB2011-09-23 13:45:49| 分类：MPIS-VPN |标签：叩lsvpn 跨域 optionh|字号大中小 订阅Mpls vpn跨域optionB有两种方式:第一种方式为ASBR之间通过单跳MP-EBGP, ASBR之间必须直联第二种方式为ASBR之间通过多跳MP-EBGP，ASBR之间必须采用tunnel方式，本文只介绍这种方式。Mpls vpn over gre ！对于mpls vpn over gre的这种方式，有两种方法可以使VPNv4的下一跳地址在接收路由更新的AS 中可达：将ASBR之间的tunnel互联地址重分布到IGP

2、；ASBR在向PE （或RR）传递从另一个AS学到的VPNv4的路由时，下一跳为自已，也就是 next-hop-self实验拓扑图如下：方法一：默认情况下，R6从AS1学到VPNv4的路由再通告给R10（RR）时，下一跳地址为R4的F0/0的地址,但是R10学到VPNv4路由的下一跳地址不可达，所以在R4和R6上分别将tunnel的互联地址重新分发到IGP中，这样R10才通将VPNv4的路由传递给R9。实用文档在标签交换方面，下一跳地址不改变，就不会重新分配标签。如R9学到的VPNv4的路由分配out标 签是由R4分配的。R9# show ip cef vrf test 11.11.11.11

3、11.11.11.11/32, version 34, epoch 0, cached adjacency 192.168.2.90 packets, 0 bytestag information set, all rewrites ownedlocal tag: VPN route headfast tag rewrite with Fa0/0, 192.168.2.9, tags imposed 840 427via 192.168.0.5, 0 dependencies, recursivenext hop 192.168.2.9, FastEthernet0/0 via 192.168

4、.0.5/32 (Default)valid cached adjacencytag rewrite with Fa0/0, 192.168.2.9, tags imposed 840 427R11#traceroute 12.12.12.12Type escape sequence to abort.Tracing the route to 12.12.12.1210.0.0.1 60 msec 140 msec 168 msec192.168.1.2 MPLS: Labels 232/643 Exp 0 1008 msec 1028 msec 936 msec192.168.1.6 MPL

5、S: Labels 332/643 Exp 0 840 msec 1004 msec 816 msec192.168.1.10 MPLS: Labels 426/643 Exp 0 888 msec 836 msec 768 msec192.168.0.6MPLS:Label 643 Exp 0 768 msec812 msec1176msec 只有单层标签 TOC o 1-5 h z 192.168.2.2MPLS:Labels 717/939Exp0888msec932msec936msec192.168.2.6MPLS:Labels 813/939Exp0792msec740msec81

6、6msec10.0.0.5 AS 20 MPLS: Label 939Exp0796msec688msec984msec10.0.0.6 AS 20 1032 msec 884 msec 984 msecR11#R4和R6上只保存本AS内的VPNv4的路由实用文档R4#show mpls forwarding-tableLocalOutgoingPrefixBytestagOutgoingNextHoptagIdtag switchedinterfaceorVCorTunnel416192.168.0.2Untagged6.6.6.6/320Fa0/04172.168.1.91101:1:10

7、.0.0.0/30610Fa1/119418tag192.168.1.16/300Fa1/1192.168.1.9Pop419tag192.168.1.4/300Fa1/1192.168.1.9Pop420192.168.1.9303192.168.1.12/300Fa1/1421192.168.1.9300192.168.1.0/300Fa1/1422192.168.1.93011.1.1.1/3215844Fa1/1423192.168302.1.92.2.2.2/320Fa1/1424tag3.3.3.3/320Fa1/1192.168.1.9Pop425192.168.13285.5.

8、5.5/323573Fa1/1426tag192.168.0.6/32640Tu0point2pointPop4271381:1:11.11.11.11/32Fa1/1192.168.1.950684281371:1:192.168.10.0/240Fa1/1192.168.1.9实用文档R6#show mpls forwarding-tableHopLocalOutgoingPrefixBytestag OutgoingNextIdtagtag switchedinterfaceorVCorTunnel192.608168.0.1Untagged4.4.4.4/320Fa0/0tag6091

9、92.168.0.1/320Fa0/0192.168.0.1Poptag610192.168.2.12/300Fa1/0192.168.2.2Poptag611192.168.2.4/300Fa1/0192.168.2.2Pop192.612168.2.2714192.168.2.16/300Fa1/0192613.168.2.2716192.168.2.8/300Fa1/0tag6147.7.7.7/320Fa1/0192.168.2.2Pop615192.168715.2.28.8.8.8/320Fa1/0640192.168717.2.29.9.9.9/320Fa1/06412.168.

10、2.271310.10.10.10/321216Fa1/019tag642192.168.0.5/32640Tu0point2pointPop6439391:1:12.12.12.12/32Fa1/0192.168.2.26106449381:1:192.168.20.0/240Fa1/0192.168.2.2R4的配置:实用文档hostname R4!boot-start-markerboot-end-marker!ip subnet-zero!ip cefno ip domain-lookupmpls label range 400 499mpls label protocol ldpin

11、terface Loopback0ip address 4.4.4.4 255.255.255.255no ip directed-broadcast!interface Tunnel0ip address 192.168.0.5 255.255.255.252no ip directed-broadcastmpls bgp forwardingtunnel source Loopback0tunnel destination 6.6.6.6!interface FastEthernet0/0ip address 192.168.0.1 255.255.255.252no ip directe

12、d-broadcast实用文档.国gno ip addressno ip directed-broadcastshutdownduplex halftointerface - iteriace asti-LiierneLip address 192.168.1.10 255.255.255.252no ip directed-broadcastduplex halfspeed auto，ing ip一1log-adjacency-changesredistribute connected subnetsnetwork 4.4.4.4 0.0.0.0 area 0network 192.168.

13、1.8 0.0.0.3 area 0。1no bgp default route-target filterbgp log-neighbor-changesneighbor 5.5.5.5 remote-as 1neighbor 5.5.5.5 update-source Loopback0neighbor 192.168.0.6 remote-as 2ily ipv4实用文档neighbor 5.5.5.5 activateno neighbor 192.168.0.6 activateno auto-summaryno synchronizationexit-address-family!

14、address-family vpnv4neighbor 5.5.5.5 activateneighbor 5.5.5.5 send-community bothneighbor 192.168.0.6 activateneighbor 192.168.0.6 send-community bothexit-address-family!ip classlessip route 6.6.6.6 255.255.255.255 192.168.0.2control-plane!line con 0exec-timeout 0 0stopbits 1line aux 0stopbits 1line

15、 vty 0 4login!no cns aaa enable实用文档R6的配置：hostname R6 !boot-start-markerboot-end-marker !ip subnet-zero!ip cefno ip domain-lookup mpls label range 600 699 mpls label protocol ldpinterface Loopback0ip address 6.6.6.6 255.255.255.255no ip directed-broadcast!interface Tunnel0ip address 192.168.0.6 255.2

16、55.255.252no ip directed-broadcastmpls bgp forwardingtunnel source Loopback0tunnel destination 4.4.4.4!interface FastEthernet0/0实用文档ip address 192.168.0.2 255.255.255.252no ip directed-broadcast，晔forwardinginterface FastEthernet”。ip address 192.168.2.1 255.255.255.252no ip directed-broadcastduplex h

17、alfspeed autoing ipinterface FastEthernet.1nLeriacenasLi-LiierneLno ip addressno ip directed-broadcastshutdownduplex halftorouter ospf 1log-adjacency-changesredistribute connected subnetsnetwork 6.6.6.6 0.0.0.0 area 0network 192.168.2.0 0.0.0.3 area 0router bgp 2no synchronizationno bgp default rout

18、e-target filterbgp log-neighbor-changes实用文档neighbor 10.10.10.10 remote-as 2neighbor 10.10.10.10 update-source Loopback0neighbor 192.168.0.5 remote-as 1no auto-summary !address-family vpnv4neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community bothneighbor 192.168.0.5 activateneighbor 192.1

19、68.0.5 send-community bothexit-address-family!ip classlessip route 4.4.4.4 255.255.255.255 192.168.0.1tag-switching tdp router-id Loopback0control-plane!line con 0exec-timeout 0 0stopbits 1line aux 0stopbits 1line vty 0 4login!no cns aaa enable实用文档end第二种方法：采用next-host-self这时ASBR上同时保存另一个AS的VPN路由，标签也由

20、ASBR分配R9# show ip cef vrf test 11.11.11.1111.11.11.11/32, version 37, epoch 0, cached adjacency 192.168.2.90 packets, 0 bytestag information set, all rewrites ownedlocal tag: VPN route headfast tag rewrite with Fa0/0, 192.168.2.9, tags imposed 810 645via 6.6.6.6, 0 dependencies, recursivenext hop 19

21、2.168.2.9, FastEthernet0/0 via 6.6.6.6/32 (Default)valid cached adjacencytag rewrite withFa0/0,192.168.2.9, tags imposed 810645R6#show mpls forwarding-tableHopLocalOutgoingPrefixBytestag OutgoingNextIdtagtag switchedinterfaceorVCorTunnel192.608168.0.1Untagged4.4.4.4/320Fa0/0tag609192.168.0.1/320Fa0/

22、0192.168.0.1Poptag610192.168.2.12/300Fa1/0192.168.2.2Poptag611192.168.2.4/300Fa1/0192.168.2.2Pop192.612168.2.2714192.168.2.16/300Fa1/0192613.168.2.7162192.168.2.8/300Fa1/0tag6147.7.7.7/320Fa1/0192.168.2.2Pop实用文档615715192.168.2.28.8.8.8/320Fa1/06407179.9.9.9/320Fa1/0192.168.2.264171310.10.10.10/320Fa

23、1/0192.168.2.2642Poptag192.168.0.5/325068Tu0point2point6439391:1:12.12.12.12/322956Fa1/0192.168.2.26449381:1:192.168.20.0/240Fa1/0192.168.2.26454271:1:11.11.11.11/320Tu0point2point6464281:1:192.168.10.0/240Tu0point2point6474171:1:10.0.0.0/300Tu0point2pointR4#show mpls forwarding-tableHopLocalOutgoin

24、gPrefixBytestag OutgoingNextIdtagswitchedtagorinterfaceVCorTunnel192.416168.0.2Untagged6.6.6.6/320Fa0/0.168417.1.91101:1:10.0.0.0/304894Fa1/1192tag418192.168.1.16/300Fa1/1192.168.1.9Pop实用文档tag419192.168.1.4/300Fa1/1192.168.1.9Pop192.420303168.1.9192.168.1.12/300Fa1/1192421300.168.1.9192.168.1.0/300F

25、a1/1192422301.168.1.91.1.1.1/3215844Fa1/1423302192.168.1.92.2.2.2/320Fa1/1tag4243.3.3.3/320Fa1/1192.168.1.9Pop425328192.168.1.95.5.5.5/323573Fa1/1tag426192.168.0.6/322680Tu0point2pointPop4271381:1:11.11.11.11/32Fa1/1192.168.1.950684281371:1:192.168.10.0/24Fa1/1192.168.1.904296441:1:192.168.20.0/24Tu

26、0point2point04486431:1:12.12.12.12/32Tu0point2point04496091:1:10.0.0.4/300Tu0point2pointR11#traceroute 12.12.12.12Type escape sequence to abort.Tracing the route to 12.12.12.12实用文档10.0.0.1 112 msec 88 msec100 msec192.168.1.2 MPLS: Labels205/448Exp0912 msec884 msec 936 msec TOC o 1-5 h z 192.168.1.6

27、MPLS: Labels329/448Exp0984 msec1008 msec 884msec192.168.1.10 MPLS: Label448 Exp0 936msec 812msec 888 msec192.168.0.6 MPLS: Label 643 Exp 0 840 msec 764 msec 860 msec /标签由 448 变成 643192.168.2.2 MPLS: Labels717/939Exp0912 msec764 msec 1080msec192.168.2.6 MPLS: Labels813/939Exp01008 msec 884 msec 864ms

28、ec10.0.0.5 AS 20 MPLS: Label 939 Exp 0 744 msec 764 msec 792 msec10.0.0.6 AS 20 864 msec 812 msec 888 msecR4的配置router ospf 1 log-adjacency-changes network 4.4.4.4 0.0.0.0 area 0 network 192.168.1.8 0.0.0.3 area 0!router bgp 1no bgp default route-target filter bgp log-neighbor-changes neighbor 5.5.5.5 remote-as 1neighb