配置设备之间部署BGP/MPLS IP VPN实现互通的示例

适用产品和版本

适用于所有版本。

AR100&AR120&AR160系列、AR301、AR301H和AR301W不支持此功能。

组网需求

如图1:

• CE1、CE3属于vpna。

• CE2、CE4属于vpnb。

• vpna使用的VPN-target属性为111:1，vpnb为222:2。

• 不同VPN用户之间不能互相访问。

图1?配置BGP/MPLS IP VPN组网图

操作步骤

1. 配置PE1

   #
    sysname PE1
   #
   ip vpn-instance vpna  //创建VPN实例vpna
    ipv4-family
     route-distinguisher 100:1
     vpn-target 111:1 export-extcommunity
     vpn-target 111:1 import-extcommunity
   #
   ip vpn-instance vpnb  //创建VPN实例vpnb
    ipv4-family
     route-distinguisher 100:2
     vpn-target 222:2 export-extcommunity
     vpn-target 222:2 import-extcommunity
   #
   mpls lsr-id 1.1.1.9  //配置MPLS
   mpls
   #
   mpls ldp  //建立LDP
   #
   interface Ethernet1/0/0  //绑定VPN实例
    ip binding vpn-instance vpna
    ip address 10.1.1.2 255.255.255.0
   #
   interface Ethernet2/0/0
    ip binding vpn-instance vpnb  //绑定VPN实例
    ip address 10.2.1.2 255.255.255.0
   #
   interface Ethernet2/0/1  //接口使能MPLS
    ip address 172.1.1.1 255.255.255.0
    mpls
    mpls ldp
   #
   interface LoopBack1
    ip address 1.1.1.9 255.255.255.255
   #
   bgp 100  //配置MP-IBGP对等体
    peer 3.3.3.9 as-number 100
    peer 3.3.3.9 connect-interface LoopBack1
    #
    ipv4-family unicast
     undo synchronization
     peer 3.3.3.9 enable
    #
    ipv4-family vpnv4  //使能对等体交换VPNv4路由信息的能力
     policy vpn-target
     peer 3.3.3.9 enable
    #
    ipv4-family vpn-instance vpna  //配置PE与CE之间建立EBGP对等体关系，引入VPN路由
     peer 10.1.1.1 as-number 65410
     import-route direct
    #
    ipv4-family vpn-instance vpnb  //配置PE与CE之间建立EBGP对等体关系，引入VPN路由
     peer 10.2.1.1 as-number 65420
     import-route direct
   #
   ospf 1  //配置公网路由
    area 0.0.0.0
     network 172.1.1.0 0.0.0.255
     network 1.1.1.9 0.0.0.0
   #
   return

2. 配置P

   #
    sysname P
   #
   mpls lsr-id 2.2.2.9  //配置MPLS
   mpls
   #
   mpls ldp
   #
   interface Ethernet1/0/0
    ip address 172.1.1.2 255.255.255.0
    mpls
    mpls ldp
   #
   interface Ethernet2/0/0
    ip address 172.2.1.1 255.255.255.0
    mpls
    mpls ldp
   #
   interface LoopBack1
    ip address 2.2.2.9 255.255.255.255
   #
   ospf 1  //配置公网路由
    area 0.0.0.0
     network 172.1.1.0 0.0.0.255
     network 172.2.1.0 0.0.0.255
     network 2.2.2.9 0.0.0.0
   #
   return

3. 配置PE2

   #
    sysname PE2
   #
   ip vpn-instance vpna  //创建VPN实例vpna
    ipv4-family
     route-distinguisher 200:1
     vpn-target 111:1 export-extcommunity
     vpn-target 111:1 import-extcommunity
   #
   ip vpn-instance vpnb  //创建VPN实例vpnb
    ipv4-family
     route-distinguisher 200:2
     vpn-target 222:2 export-extcommunity
     vpn-target 222:2 import-extcommunity
   #
   mpls lsr-id 3.3.3.9  //配置MPLS LSR
   mpls
   #
   mpls ldp
   #
   interface Ethernet1/0/0 //绑定VPN实例
    ip binding vpn-instance vpna
    ip address 10.3.1.2 255.255.255.0
   #
   interface Ethernet2/0/0  //绑定VPN实例
    ip binding vpn-instance vpnb
    ip address 10.4.1.2 255.255.255.0
   #
   interface Ethernet2/0/1  //接口使能MPLS
    ip address 172.2.1.2 255.255.255.0
    mpls
    mpls ldp
   #
   interface LoopBack1
    ip address 3.3.3.9 255.255.255.255
   #
   bgp 100  //配置MP-IBGP对等体
    peer 1.1.1.9 as-number 100
    peer 1.1.1.9 connect-interface LoopBack1
    #
    ipv4-family unicast
     undo synchronization
     peer 1.1.1.9 enable
    #
    ipv4-family vpnv4  //使能对等体交换VPNv4路由信息的能力
     policy vpn-target
     peer 1.1.1.9 enable
    #
    ipv4-family vpn-instance vpna  //配置PE与CE之间建立EBGP对等体关系，引入VPN路由
     peer 10.3.1.1 as-number 65430
     import-route direct
    #
    ipv4-family vpn-instance vpnb  //配置PE与CE之间建立EBGP对等体关系，引入VPN路由
     peer 10.4.1.1 as-number 65440
     import-route direct
   #
   ospf 1  //配置公网路由
    area 0.0.0.0
     network 172.2.1.0 0.0.0.255
     network 3.3.3.9 0.0.0.0
   #
   return

4. 配置CE1

   #
    sysname CE1
   #
   interface Ethernet1/0/0
    ip address 10.1.1.1 255.255.255.0
   #
   bgp 65410  //在PE与CE之间建立EBGP对等体关系
    peer 10.1.1.2 as-number 100
    #
    ipv4-family unicast
     undo synchronization
     import-route direct  //引入直连路由
     peer 10.1.1.2 enable
   #
   return

5. 配置CE2

   #
    sysname CE2
   #
   interface Ethernet1/0/0
    ip address 10.2.1.1 255.255.255.0
   #
   bgp 65420  //在PE与CE之间建立EBGP对等体关系
    peer 10.2.1.2 as-number 100
    #
    ipv4-family unicast
     undo synchronization
     import-route direct  //引入直连路由
     peer 10.2.1.2 enable
   #
   return

6. 配置CE3

   #
    sysname CE3
   #
   interface Ethernet1/0/0
    ip address 10.3.1.1 255.255.255.0
   #
   bgp 65430  //在PE与CE之间建立EBGP对等体关系
    peer 10.3.1.2 as-number 100
    #
    ipv4-family unicast
     undo synchronization
     import-route direct  //引入直连路由
     peer 10.3.1.2 enable
   #
   return

7. 配置CE4

   #
    sysname CE4
   #
   interface Ethernet1/0/0
    ip address 10.4.1.1 255.255.255.0
   #
   bgp 65440  //在PE与CE之间建立EBGP对等体关系
    peer 10.4.1.2 as-number 100
    #
    ipv4-family unicast
     undo synchronization
     import-route direct  //引入直连路由
     peer 10.4.1.2 enable
   #
   return

配置注意事项

• PE之间必须使用32位掩码的Loopback接口地址来建立MP-IBGP对等体关系，以便能够迭代到隧道。