【无标题】

一，首先给mpls vpn骨干网络配置公网IP地址
二，使用OSPF获取公网IP的路由条目
ospf 1 router-id 2.2.2.2
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 23.0.0.0 0.0.0.255
三，创建mlps
[r2]mpls lsr-id 2.2.2.2
[r2]mpls
[r2]mpls ldp
[r2-GigabitEthernet0/0/1]mpls -
[r2-GigabitEthernet0/0/1]mpls ldp

配置vpn a
[r2]ip vpn-instance a
[r2-vpn-instance-a]route-distinguisher 100:100
[r2-vpn-instance-a-af-ipv4]vpn-target 100:1 both
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ip binding vpn-instance a
[r2-GigabitEthernet0/0/0]ip address 192.168.2.2 24 -

配置vpn b
[r2]ip vpn-instance b
[r2-vpn-instance-b]route-distinguisher 200:200
[r2-vpn-instance-b-af-ipv4]vpn-target 200:1 both
[r2]int g0/0/2
[r2-GigabitEthernet0/0/2]ip binding vpn-instance b
[r2-GigabitEthernet0/0/2]ip address 172.16.2.2 24
配置vpn a
[r4]ip vpn-instance a
[r4-vpn-instance-a]route-distinguisher 100:100
[r4-vpn-instance-a-af-ipv4]vpn-target 100:1 both
[r4]int g0/0/1
[r4-GigabitEthernet0/0/1]ip binding vpn-instance a
[r4-GigabitEthernet0/0/1]ip address 192.168.3.2 24

配置vpn b
[r4]ip vpn-instance b
[r4-vpn-instance-b]route-distinguisher 200:200
[r4-vpn-instance-b-af-ipv4]vpn-target 200:1 both
[r4]int g0/0/2
[r4-GigabitEthernet0/0/2]ip binding vpn-instance b
[r4-GigabitEthernet0/0/2]ip address 172.16.3.2 24
[r2]display ip routing-table vpn-instance a

[r2]ping -vpn-instance a 192.168.2.1
五，配置BGP建邻
R2:
[r2]bgp 1
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 4.4.4.4 as-number 1
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r2-bgp]ipv4-family vpnv4
[r2-bgp-af-vpnv4]peer 4.4.4.4 enable
R4:
[r4]bgp 1
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 2.2.2.2 as-number 1
[r4-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r4-bgp]ipv4-family vpnv4
[r4-bgp-af-vpnv4]peer 2.2.2.2 enable
六，给R1-R2 和 R4-R5配置静态，使其可以互相访问
（一）配置静态路由

R1：
[r1]ip route-static 192.168.3.0 24 192.168.1.2
[r1]ip route-static 192.168.4.0 24 192.168.1.2
R2：
[r2]ip route-static vpn-instance a 192.168.1.0 192.168.2.1
R4:
[r4]ip route-static vpn-instance a 192.168.4.0 24 192.168.3.1
R5:
[r5]ip route-static 192.168.1.0 24 192.168.3.2
[r5]ip route-static 192.168.2.0 24 192.168.3.2

（二）进入BGP发布路由

[r2]bgp 1
[r2-bgp]ipv4-family vpn-instance a
[r2-bgp-a]import-route static
[r2-bgp-a]import-route direct

[r4]bgp 1
[r4-bgp]ipv4-family vpn-instance a
[r4-bgp-a]import-route static
[r4-bgp-a]import-route direct
————————————————
七，R6通过RIP将私网路由传递给PE设备，R7通过osPF将私网路由传递给PE设备，
R2——R6：rip
[r2]rip 1 vpn-instance b
[r2-rip-1]v 2
[r2-rip-1]network 172.16.0.0
[r6]rip
[r6-rip-1]v 2
[r6-rip-1]network 172.16.0.0
R4—R7: ospf
[r4]ospf 2 vpn-instance b router-id 4.4.4.4
[r4-ospf-2]a 0
[r4-ospf-2-area-0.0.0.0]network 172.16.0.0 0.0.255.255
[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]a 0
[r7-ospf-1-area-0.0.0.0]net
[r7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

双点重发布
[r2]rip
[r2-rip-1]import-route bgp 1
[r2]bgp 1
[r2-bgp]ipv4-family vpn-instance b
[r2-bgp-b]import-route rip 1

[r4]bgp 1
[r4-bgp]ipv4-family vpn-instance b
[r4-bgp-b]import-route ospf 2
[r4]ospf 2
[r4-ospf-2]import-route bgp
八，配置一条缺省，使R7可以访问R2/R3/R4环回。
[r7]ip route-static 0.0.0.0 0 47.0.0.1