BGP+MPLS综合实验

实验内容

实验过程 

实验拓扑图

 根据题目要求进行IP地址规划

用户网段
172.16.2.0/24
172.16.3.0/24
172.16.4.0/24
172.16.5.0/24
172.16.6.0/24
172.16.7.0/24

环回地址
172.16.1.2/32
172.16.1.3/32
172.16.1.4/32
172.16.1.5/32
172.16.1.6/32
172.16.1.7/32

配置IGP环境均使用oSPF协议

[R2]ospf 1 
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

同时将loopback1工作方式修改为broadcast

[R2]interface LoopBack 1
[R2-LoopBack1]ospf network-type broadcast

R3--R7同R2   查看路由表

r1\r2\r5\r7\r8启用BGP 协议 修改r2\r5\r7的下一跳  宣告r1\r8的用户网段

[R1]bgp 1
[R1-bgp]router-id 1.1.1.1 
[R1-bgp]peer 12.1.1.2 as-number 2
[R1-bgp]peer 15.1.1.2 as-number 2

[R2]bgp 2
[R2-bgp]router-id 172.16.1.2
[R2-bgp]peer 12.1.1.1 as-number 1
[R2-bgp]peer 172.16.1.5 as-number 2
[R2-bgp]peer 172.16.1.5 connect-interface LoopBack 0
[R2-bgp]peer 172.16.1.7 as-number 2
[R2-bgp]peer 172.16.1.7 connect-interface LoopBack 0

[R5]bgp 2
[R5-bgp]router-id 172.16.1.5
[R5-bgp]peer 15.1.1.1 as-number 1
[R5-bgp]peer 172.16.1.2 as-number 2
[R5-bgp]peer 172.16.1.2 connect-interface LoopBack 0
[R5-bgp]peer 172.16.1.7 as-number 2
[R5-bgp]peer 172.16.1.7 connect-interface LoopBack 0

[R7]bgp 2
[R7-bgp]router-id 172.16.1.7
[R7-bgp]peer 172.16.1.2 as-number 2
[R7-bgp]peer 172.16.1.2 connect-interface LoopBack 0
[R7-bgp]peer 172.16.1.5 as-number 2
[R7-bgp]peer 172.16.1.5 connect-interface LoopBack 0
[R7-bgp]peer 78.1.1.2 as-number 3

[R8]bgp 3
[R8-bgp]router-id 8.8.8.8
[R8-bgp]peer 78.1.1.1 as-number 2

[R2-bgp]peer 172.16.1.5 next-hop-local
[R2-bgp]peer 172.16.1.7 next-hop-local

[R5-bgp]peer 172.16.1.2 next-hop-local
[R5-bgp]peer 172.16.1.7 next-hop-local

[R7-bgp]peer 172.16.1.2 next-hop-local
[R7-bgp]peer 172.16.1.5 next-hop-local

[R1-bgp]network 10.10.10.10 24
[R1-bgp]network 80.80.80.80 24

使用MPLS解决BGP路由黑洞问题

[R2]route recursive-lookup tunnel

 r5\r7做同样配置

r3\r4\r7启用MPLS协议（例如：r2）

[R2]mpls lsr-id 172.16.1.2
[R2]mpls
Info: Mpls starting, please wait... OK!
[R2-mpls]mpls ldp
[R2-mpls-ldp]q
[R2]interface GigabitEthernet 0/0/1
[R2-GigabitEthernet0/0/1]mpls
[R2-GigabitEthernet0/0/1]mpls ldp 
[R2-GigabitEthernet0/0/1]q
[R2]interface GigabitEthernet 0/0/2
[R2-GigabitEthernet0/0/2]mpls 
[R2-GigabitEthernet0/0/2]mpls ldp 
[R2-GigabitEthernet0/0/2]q

 

宣告AS2的路由

[r2]bgp 2
[r2-bgp]network 172.16.2.0 24
[r2-bgp]network 172.16.3.0 24
[r2-bgp]network 172.16.4.0 24

[r5]bgp 2
[r5-bgp]network 172.16.5.0 24
[r5-bgp]network 172.16.6.0 24
[r5-bgp]network 172.16.7.0 24

 在r1上查看BGP路由表，对172.16.2.0/24进行干涉

[R2]ip ip-prefix a permit 172.16.2.0 24
[R2]route-policy a permit node 10
Info: New Sequence of this List.
[R2-route-policy]if-match ip-prefix a
[R2-route-policy]apply cost 1
[R2-route-policy]q
[R2]route-policy a permit node 20
Info: New Sequence of this List.
[R2-route-policy]q
[R2]bgp 2
[R2-bgp]peer 12.1.1.1 route-policy a export

再次查看路由表

 选路干涉成功

测试

实验结束