无锡广电ATM采用双星型的拓扑结构,骨干交换速率为622Mbps。为了开通MPLS VPN,对骨干线路的速率进行了划分:400Mbps用于专线联网,200Mbps用于IP业务。
BGP/MPLS VPN的实现
1.LSC的设置:
LSCgd(广电机房)配置……
interface XTagATM41
description to 机房1
ip address 10.10.4.17 255.255.255.252
no ip directed-broadcast
no ip route-cache cef
extended-port ATM1/0 bpx 4.1
tag-switching ip!
router ospf 1
network 10.10.0.0 0.0.255.255 area 0
通过以上配置,每一个LSC通过OSPF协议,可以学习到PE路由器之间的路由,如:
LSCgd#sh ip route | include XTagATM41
O 10.10.5.5/32 [110/2] via 10.10.4.18, 00:08:42, XTagATM41
O 10.10.3.0/24 [110/2] via 10.10.4.18, 00:08:42, XTagATM41
O 10.10.3.16/30 [110/3] via 10.10.4.18, 00:08:42, XTagATM41
C 10.10.4.16/30 is directly connected, XTagATM41
O 10.10.5.69/32 [110/3] via 10.10.4.18, 00:08:42, XTagATM41 |
2.RPM的设置
RPMgd(机房1)设置
interface Loopback0
ip address 10.10.5.65 255.255.255.255 ;广电中心的环回IP地址
!
ip vrf VPN1
;定义运营商VPN
rd 100:1
;定义VPN号
route-target export 100:1
;允许输出路由交换的VPN号
route-target import 100:1
;允许输入路由交换的VPN号
ip cef!
interface FastEthernet1/1.201
description to 江阴分公司
encapsulation isl 201
ip vrf forwarding VPN1
ip address 172.16.9.17 255.255.255.252
;与分公司的互连IP地址
no ip redirects
no ip mroute-cache!
router bgp 65000
address-family ipv4 vrf VPN1
redistribute connected metric 88
;重分配互连地址172.16.9.16/30
no auto-summary
;取消自动汇总
no synchronization
;采用全IBGP,所以可以取消同步
exit-address-family !
address-family vpnv4
neighbor 10.10.5.69 activate
neighbor 10.10.5.69 route-reflector-client
;定义广电中心RPM为路由反射器
neighbor 10.10.5.69 send-community extended
no auto-summary
exit-address-family |
通过以上配置,实现了江阴分公司与该公司总部的通讯。