实验目的
MPLS VPN Intranet场景
实验过程
a.AS345底层ospf连通，R1和R3，R5和R6EBGP邻居，R2和R3，R7和R5 OSPF实例邻居
b.ospf实例，BGP互引
1.R1.R6互通
AS345底层ospf连通，R3，R5IBGP邻居，建立VPNv4通道
R1和R3，R5和R6建立EBGP实例邻居
R3
bgp 345
peer 5.5.5.5 as-number 345
peer 5.5.5.5 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
network 3.3.3.3 255.255.255.255
peer 5.5.5.5 enable
#
ipv4-family vpnv4
policy vpn-target
peer 5.5.5.5 enable
#
ipv4-family vpn-instance a
peer 192.168.13.1 as-number 100
R5
bgp 345
peer 3.3.3.3 as-number 345
peer 3.3.3.3 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
peer 3.3.3.3 enable
#
ipv4-family vpnv4
policy vpn-target
peer 3.3.3.3 enable
ipv4-family vpn-instance a2
peer 192.168.56.6 as-number 600
R1.R6在BGP里宣告路由，此时BGP全局下没有R1.R6路由
R1.R6路由在BGP实例中
路由可达，R1.R6PING通
2.R2.R7互通
a.
R3
ip vpn-instance b
ipv4-family
route-distinguisher 2:2
vpn-target 2:7 export-extcommunity
vpn-target 7:2 import-extcommunity
ospf 2 router-id 3.3.3.3 vpn-instance b
area 0.0.0.0
b.
R5
ip vpn-instance b2
ipv4-family
route-distinguisher 7:7
vpn-target 7:2 export-extcommunity
vpn-target 2:7 import-extcommunity
ospf 2 router-id 5.5.5.5 vpn-instance b2
area 0.0.0.0
b.ospf实例，BGP互相导入
R3
ipv4-family vpn-instance b
import-route ospf 2
ospf 2 router-id 3.3.3.3 vpn-instance b
import-route bgp
area 0.0.0.0
R5
ipv4-family vpn-instance b2
import-route ospf 2
ospf 2 router-id 5.5.5.5 vpn-instance b2
import-route bgp
area 0.0.0.0
导入后学习到对方路由
R2pingR7
