1、Cisco 7200 系列路由器. PE 路由器:Cisco 2691, 或者3640 系列路由器.C 和CE 路由器 任何可以和PE 交换路由信息的路由器都可以作为C 和CE 路由器.缩写约定 P - Providers core router. PE - Providers edge router. CE - Customer C - Customers router.我们将用下面的拓扑图进行举例说明: 配置网络拓扑图本文档使用下面的拓扑图,网络中有3 台P 路由器、2 台PE 路由器(Pescara 和Pesaro),2 个VPN 客户分别是Customer_A 和Customer_B:
2、配置过程启用ip cef使用下面的过程启用ip cef.,为了提高性能,可以在支持的路由器上使用ip cef distributed命令。当在接口上配置了MPLS 后(在接口上配置 tag-switching ip).,还要在PE 上完成下面的步骤: 1. 在路由器上为每个相连的VPN创建一个VRF,使用命令 ip vrf配置ip vrf 的时候:o 为每个VPN指定正确的RD.这是为了扩展IP 地址之用,以便你可以识别IP 地址属于哪个VPN. rdo 配置MP-BGP的扩展communities 的import 和export 值. 这是用于过滤import 和export 过程的. ro
3、ute-target export|import|both 2. 在VPN 各自的接口下使用ip vrf forwarding 命令,别忘了还需要配置IP 地址3. 配置PE-CE 间使用的路由协议,可是使用静态路由或者动态路由(RIP、OSPF、BGP).配置MP-BGP在PE 路由器之间配置MP-BGP.有几种办法来配置BGP,例如路由反射器或者联盟.我们这儿使用直连的邻居进行举例.1. 声明彼此的邻居2. 为这台PE 上的每个VPN配置address-family ipv4 vrf VPN routing/forwarding instance name 命令.如果需要的话,完成下面的步
4、骤 o 重分布静态、RIP、或者OSPF 路由 o 重分布直连的路由 o Activate 和CE 路由器间的BGP 邻居3. 进入address-family vpnv4 模式,完成下面的配置: o Activate the neighbors. Activate 邻居 o 指定必须使用扩展community,这是必须的.本例中的5 台路由器配置如下:PescaraCurrent configuration:!version 12.2hostname Pescaraip cef- Customer_A 的配置.ip vrf Customer_A-启用Customer_A 的VPN 路由和转发
5、表 (VRF).rd 100:110 - Route distinguisher creates routing and forwarding- tables for a VRF.route-target export 100:1000- Creates lists of import and export route-target extended- communities for the specified VRF.route-target import 100:- Customer_B 配置.ip vrf Customer_B1202000interface Loopback0ip ad
6、dress 10.10.10.4 255.255.255.255ip router isisinterface Loopback101ip vrf forwarding Customer_A-将一个接口或者自接口和一个VRF 实例关联起来.ip address 200.0.4.1 255.255.255.0- Loopback101 和 102 使用相同的IP 地址 200.0.4.1.这是准许的,因为它们属于2 个不用客户的VRFno ip directed-broadcast- Customer_B 的配置.interface Loopback102ip vrf forwarding Cu
7、stomer_Binterface Serial2/0no ip addressencapsulation frame-relayno fair-queueinterface Serial2/0.1 point-to-pointdescription link to Pauillacbandwidth 512ip address 10.1.1.14 255.255.255.252tag-switching ipframe-relay interface-dlci 401router isisnet 49.0001.0000.0000.0004.00is-type level-1router b
8、gp 100bgp log-neighbor-changes- 启用BGP 邻居关系中断的记录.neighbor 10.10.10.6 remote-as 100neighbor 10.10.10.6 update-source Loopback0- 配置BGP 邻居.- Customer A and B commands.address-family vpnv4- 进入address-family vpnv4 配置模式,配置和PE/P 路由器间的MP-BGP 路由会话。neighbor 10.10.10.6 activateneighbor 10.10.10.6 send-community
9、 both- Sends the community attribute to a BGP neighbor.exit-address-family- Customer B commands.address-family ipv4 vrf Customer_B- 进入address-family ipv4 的配置模式下,配置和CE 间的路由会话,redistribute connectedno auto-summaryno synchronization- Customer A commands.address-family ipv4 vrf Customer_Aip classlessend
10、Pesaro version 12.1hostname Pesaro110ip address 10.10.10.6 255.255.255.255ip address 200.0.6.1 255.255.255.0interface Loopback111ip address 200.1.6.1 255.255.255.0interface Serial0/0no ip mroute-cacherandom-detectinterface Serial0/0.1 point-to-pointdescription link to Pomerolip address 10.1.1.22 255
11、.255.255.252frame-relay interface-dlci 603net 49.0001.0000.0000.0006.00neighbor 10.10.10.4 remote-as 100neighbor 10.10.10.4 update-source Loopback0neighbor 10.10.10.4 activateneighbor 10.10.10.4 send-community bothPomerolversion 12.0hostname Pomerolip address 10.10.10.3 255.255.255.255interface Seri
12、al0/1interface Serial0/1.1 point-to-pointip address 10.1.1.6 255.255.255.252tag-switching mtu 1520frame-relay interface-dlci 301interface Serial0/1.2 point-to-pointdescription link to Pullignyip address 10.1.1.9 255.255.255.252frame-relay interface-dlci 303interface Serial0/1.3 point-to-pointdescrip
13、tion link to Pesaroip address 10.1.1.21 255.255.255.252frame-relay interface-dlci 306net 49.0001.0000.0000.0003.00Pullignyhostname Pullignyip address 10.10.10.2 255.255.255.255ip address 10.1.1.2 255.255.255.252frame-relay interface-dlci 201ip address 10.1.1.10 255.255.255.252frame-relay interface-d
14、lci 203passive-interface Loopback0net 49.0001.0000.0000.0002.00 Pauillachostname pauillacip address 10.10.10.1 255.255.255.255bandwith 512ip address 10.1.1.1 255.255.255.252frame-relay interface-dlci 102interface Serial0/0.2 point-to-pointdescription link to Pulligny ip address 10.1.1.5 255.255.255.
15、252frame-relay interface-dlci 103interface Serial0/0.3 point-to-pointdescription link to Pescaraip address 10.1.1.13 255.255.255.252frame-relay interface-dlci 104net 49.0001.0000.0000.0001.00检验本节讲述了如何检查你的配置是否工作正常. show ip vrf - Verifies that the correct VRF exists. show ip vrf interfaces - Verifies
16、the activated interfaces. show ip route vrf Customer_A - Verifies the routing information on the PE routers. traceroute vrf Customer_A 200.0.6.1 - Verifies the routing information on the PE routers. show ip bgp vpnv4 tag - Verifies the BGP. show ip cef vrf Customer_A 200.0.6.1 detail - Verifies the
17、routing information on the PE routers.更多的排错命令详见: MPLS VPN Solution Troubleshooting Guide.下面的输出是命令 show ip vrf 的结果 Pescara#show ip vrf Name Default RD Interfaces Customer_A 100:110 Loopback101 Customer_B 100:120 Loopback102下面的输出是命令show ip vrf interfaces 的结果.Pesaro#show ip vrf interfaces Interface IP-
18、Address VRF Protocol Loopback101 200.0.6.1 Customer_A up Loopback111 200.1.6.1 Customer_A up Loopback102 200.0.6.1 Customer_B up下面的 show ip route vrf 命令的结果显示在2 个VPNl 里面都有相同的网段 200.0.6.0/24. 这是因为两个VPN客户 Customer_A 和Customer_B 使用了重叠的IP 地址.Pescara#show ip route vrf Customer_ACodes: C - connected, S - s
19、tatic, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter areaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area* - candidate default, U - per-user static route, o - ODRGateway of last resort is not setC 200.
copyright@ 2008-2022 冰豆网网站版权所有
经营许可证编号:鄂ICP备2022015515号-1