MPLS实验

一、要求

二、分析
1、做WPLS之前，需要保证IP可达；

2、RIP、OSPF做双向重发布到BGP；

3、R2和R4的私有地址先暂时不要配地址，因为配了后，路由将会进入到公有路由

三、拓扑图构建 

四、配置
配置IP和OSPF，以R2为例，R3，R4也是该如此配置

 <Huawei>sys
[Huawei]sys r2
[r2]int g0/0/1
[r2-GigabitEthernet0/0/1]ip add 23.1.1.1 24
[r2-GigabitEthernet0/0/1]int loo0
[r2-LoopBack0]ip add 2.2.2.2 24
[r2-LoopBack0]q
[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]network 23.1.1.0 255.255.255.0

配置MPLS域

[r2]mpls lsr-id 2.2.2.2        //必须先定义mpls的router-id，要为本地设备的真实ip地址，且邻居可达，因为该地址将用于建立TCP会话，建议使用环回地址
[r2]mpls        //开启mpls协议
[r2-mpls]mpls ldp        //激活LDP协议
[r2-mpls-ldp]q
[r2]int g0/0/1
[r2-GigabitEthernet0/0/1]mpls
[r2-GigabitEthernet0/0/1]mpls ldp

[r3]mpls lsr-id 3.3.3.3
[r3]mpls
[r3-mpls]mpls ldp
[r3-mpls-ldp]q
[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]mpls
[r3-GigabitEthernet0/0/0]mpls ldp
[r3-GigabitEthernet0/0/0]int g0/0/1
[r3-GigabitEthernet0/0/1]mpls 
[r3-GigabitEthernet0/0/1]mpls ldp

[r4]mpls lsr-id 4.4.4.4
[r4]mpls
[r4-mpls]mpls ldp
[r4-mpls-ldp]q
[r4]int g0/0/0
[r4-GigabitEthernet0/0/0]mpls
[r4-GigabitEthernet0/0/0]mpls ldp  
 

配置MPLS、VPN

[r2]ip vpn-instance b1        //创建名为b1的vrf空间
[r2-vpn-instance-b1]ipv4-family         //进入IPV4的配置模式下
[r2-vpn-instance-b1-af-ipv4]route-distinguisher 1:1        //RD值
[r2-vpn-instance-b1-af-ipv4]vpn-target 1:1        //RT值 必须对端的PE端一致
[r2-vpn-instance-b1-af-ipv4]q
[r2-vpn-instance-b1]q
[r2]int g0/0/0         //进入链接CE端的接口
[r2-GigabitEthernet0/0/0]ip binding vpn-instance b1        //关联到vrf空间
[r2-GigabitEthernet0/0/0]ip add 172.16.2.2 24        //配置私有ip地址
[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ip add 172.16.2.1 24
[r1-GigabitEthernet0/0/0]int loo0
[r1-LoopBack0]ip add 192.168.1.1 24

R4和R5配置

[r4]ip vpn-instance b2
[r4-vpn-instance-b2]ipv4-family
[r4-vpn-instance-b2-af-ipv4]route-distinguisher 1:1
[r4-vpn-instance-b2-af-ipv4]vpn-target 1:1
[r4-vpn-instance-b2-af-ipv4]q
[r4-vpn-instance-b2]q
[r4]int g0/0/1
[r4-GigabitEthernet0/0/1]ip binding vpn-instance b2
[r4-GigabitEthernet0/0/1]ip add 172.16.3.1 2
[r5]int g0/0/0
[r5-GigabitEthernet0/0/0]ip add 172.16.3.2 24
[r5-GigabitEthernet0/0/0]int loo0
[r5-LoopBack0]ip add 192.168.4.1 24

PE与PE间建立MP-BPG邻居关系

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2        //先和对端建立正常BGP邻居关系，可用于传递正常的公网路由
[r2-bgp]peer 3.3.3.3 as-number 2
[r2-bgp]peer 3.3.3.3 connect-interface l0        
[r2-bgp]peer 3.3.3.3 next-hop-local
[r2-bgp]peer 4.4.4.4 as-number 2
[r2-bgp]peer 4.4.4.4 next-hop-local
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0

同时还需要再在IPV4的家族模式中，与对端建立一个VPNV4的关系，用于传递VPNV4路由
[r2-bgp]ipv4-family vpnv4       
[r2-bgp-af-vpnv4]peer 4.4.4.4 enable 

[r3-bgp]peer 2.2.2.2 as-number 2
[r3-bgp]peer 2.2.2.2 next-hop-local
[r3-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r3-bgp]peer 4.4.4.4 as-number 2
[r3-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r3-bgp]peer 4.4.4.4 next-hop-local
[r4]bgp 2
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 2.2.2.2 as-number 2
[r4-bgp]peer 2.2.2.2 next-hop-local
[r4-bgp]ipv4-family vpnv4 
[r4-bgp-af-vpnv4]peer 2.2.2.2 enable 
[r4-bgp]peer 3.3.3.3 as-number 2
[r4-bgp]peer 3.3.3.3 next-hop-local
[r4-bgp]peer 3.3.3.3 connect-interface lo0

CE端与PE端交互路由

[r2]ip route-static vpn-instance b1 192.168.1.0 24 192.168.2.1
[r2]bgp 2
[r2-bgp]ipv4-family vpnv4
[r2-bgp-af-vpnv4]q

将本地vrf空间内的静态和直连路由重发布到BGP协议传递到对端的PE
[r2-bgp]ipv4 vpn-instance b1
[r2-bgp-b1]import-route static 
[r2-bgp-b1]import-route direct
[r1]ip route-static 192.168.4.0 255.255.255.0 172.16.2.2        //CE端只需写静态

[r4]ip route-static vpn-instance b2 192.168.4.0 24 172.16.3.2 
[r4]bgp 2
[r4-bgp]ipv4 vpn-instance b2
[r4-bgp-b2]import-route static 
[r4-bgp-b2]import-route direct
[r5]ip route-static 192.168.1.0 255.255.255.0 172.16.3.1

R6和R2之间配置

[r6]int g0/0/0
[r6-GigabitEthernet0/0/0]ip add 172.16.2.1 24
[r6-GigabitEthernet0/0/0]int loo0
[r6-LoopBack0]ip add 192.168.1.1 24
[r2]ip vpn-instance a1  
[r2-vpn-instance-a1]ipv4-family
[r2-vpn-instance-a1-af-ipv4]route-distinguisher 2:2
[r2-vpn-instance-a1-af-ipv4]vpn-target 2:2
[r2-vpn-instance-a1-af-ipv4]q
[r2-vpn-instance-a1]q
[r2]int g0/0/2
[r2-GigabitEthernet0/0/2]ip binding vpn-instance a1
[r2-GigabitEthernet0/0/2]ip add 172.16.2.2 24 

rip配置

[r6]rip 
[r6-rip-1]version 2
[r6-rip-1]network 192.168.1.0 
[r6-rip-1]network 172.16.0.0

[r2]rip vp
[r2]rip vpn-instance a1 
[r2]rip vpn-instance a1
[r2-rip-1]ver 2
[r2-rip-1]network 172.16.0.0

rip重发布到BGP

[r2]bgp 2
[r2-bgp]ipv4-family vpn-instance a1     
[r2-bgp-a1]import-route rip 1

BGP重发布到RIP
[r2]rip 1 vpn-instance a1
[r2-rip-1]import-route bgp 

R4和R7之间配置 

[r7]int g0/0/0
[r7-GigabitEthernet0/0/0]ip add 45.1.1.2 24
[r7-GigabitEthernet0/0/0]int g0/0/1
[r7-GigabitEthernet0/0/1]ip add 172.16.3.2 24
[r7-GigabitEthernet0/0/1]int loo0
[r7-LoopBack0]ip add 192.168.4.2 24
[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]area 0
[r7-ospf-1-area-0.0.0.0]network 192.168.4.0 255.255.255.0
[r7-ospf-1-area-0.0.0.0]network 172.16.3.0 255.255.255.0

[r7-ospf-1-area-0.0.0.0]network 45.1.1.0 255.255.255.0        //配置一条用户可上网的路由

[r4]ip vpn-instance a2
[r4-vpn-instance-a1]ipv4-family
[r4-vpn-instance-a1-af-ipv4]route-distinguisher 2:2
[r4-vpn-instance-a1-af-ipv4]vpn-target 2:2

[r4]int g4/0/0
[r4-GigabitEthernet4/0/0]ip binding vpn-instance a2

[r4-GigabitEthernet4/0/0]ip add 172.16.3.1 24

[r4-ospf-1-area-0.0.0.0]network 45.1.1.0 255.255.255.0        

[r4]ospf 2 vpn-instance a2        //这里需要注意是进程号为2

[r4-ospf-2]area 0

[r4-ospf-2-area-0.0.0.0]network 172.16.3.0 255.255.255.0

之后使用双向重发布，实现路由共享

[r4]bgp 2

[r4-bgp]ipv4-family vpn-instance a2

[r4-bgp-a]import-route ospf 2

[r4]ospf 2 vpn-instance a2

[r4-ospf-2]import-route bg

五、验证 
1.r1的环回只能pingR5的环回

 

2.R6的环回pingR7的环回 

 

 3.R7可以ping公网