实验目的
MPLS VPN Extranet场景
实验过程
1.AS345底层ospf连通，LSP使能MPLS LDP
2.R3.R4分别和R5建立IBGP邻居，和MP-IBGP邻居，VPNv4隧道
3.通过RT值实现R1.R2都能访问R6，彼此不能互访
R3配置举例
ospf 1 router-id 3.3.3.3
area 0.0.0.0
mpls lsr-id 3.3.3.3
mpls
#
mpls ldp
bgp 345
router-id 3.3.3.3
peer 5.5.5.5 as-number 345
peer 5.5.5.5 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
peer 5.5.5.5 enable
#
ipv4-family vpnv4
policy vpn-target
peer 5.5.5.5 enable
ASBR建立VPN实例
R3
ip vpn-instance 16
ipv4-family
route-distinguisher 100:1
vpn-target 1:6 export-extcommunity
vpn-target 6:1 import-extcommunity
interface GigabitEthernet0/0/0
ip binding vpn-instance 16
ip address 192.168.13.3 255.255.255.0
ipv4-family vpn-instance 16
peer 192.168.13.1 as-number 100
R4
ip vpn-instance 26
ipv4-family
route-distinguisher 200:2
vpn-target 2:6 export-extcommunity
vpn-target 6:2 import-extcommunity
interface GigabitEthernet0/0/0
ip binding vpn-instance 26
ip address 192.168.24.4 255.255.255.0
ipv4-family vpn-instance 26
peer 192.168.24.2 as-number 200
R5
ip vpn-instance 12
ipv4-family
route-distinguisher 600:6
vpn-target 6:1 6:2 export-extcommunity
vpn-target 1:6 2:6 import-extcommunity
interface GigabitEthernet0/0/0
ip binding vpn-instance 12
ip address 192.168.56.5 255.255.255.0
ipv4-family vpn-instance 12
peer 192.168.56.6 as-number 600
此时路由符合设计，R1.R2上有R6路由，彼此没有
