一.实验拓扑图
二.实验思路
1.划分网段配置IP地址
2.在AS 2内部配置OSPF协议,整个配置BGP协议(将R3,R6作为反射器,防止水平分割使R4、R7、R8学习不到宣告进的网段)
3.手工路由聚合,减少路由条目,避免环路
4.宣告整个网络所有设备的环回(都是基于172.16.0.0/16划分的,所以在边界设备即R2和R7宣告大网段并且配置空接口防环)
5.在R1和R8之间建立隧道,配置GRE,隧道使用静态路由
三、实验配置
1、配置ip
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
[R1-GigabitEthernet0/0/0]int L0
[R1-LoopBack0]ip add 172.16.0.1 32
[R1-LoopBack0]int L1
[R1-LoopBack1]ip add 192.168.1.1 24
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
[R2-GigabitEthernet0/0/0]int g0/0/2
[R2-GigabitEthernet0/0/2]ip add 172.16.1.21 30
[R2-GigabitEthernet0/0/2]int g0/0/1
[R2-GigabitEthernet0/0/1]ip add 172.16.1.1 30
[R2-GigabitEthernet0/0/1]int L0
[R2-LoopBack0]ip add 172.16.0.2 32
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip add 172.16.1.2 30
[R3-GigabitEthernet0/0/0]int g0/0/1
[R3-GigabitEthernet0/0/1]ip add 172.16.1.5 30
[R3-GigabitEthernet0/0/1]int L0
[R3-LoopBack0]ip add 172.16.0.3 32
[R3-LoopBack0]int L1
[R3-LoopBack1]ip add 172.16.3.3 24
[R4]int g0/0/0
[R4-GigabitEthernet0/0/0]ip add 172.16.1.6 30
[R4-GigabitEthernet0/0/0]int g0/0/1
[R4-GigabitEthernet0/0/1]ip add 172.16.1.9 30
[R4-GigabitEthernet0/0/1]int L0
[R4-LoopBack0]ip add 172.16.0.4 32
[R4-LoopBack0]int L1
[R4-LoopBack1]ip add 172.16.4.4 24
[R5]int g0/0/0
[R5-GigabitEthernet0/0/0]ip add 172.16.1.22 30
[R5-GigabitEthernet0/0/0]int g0/0/1
[R5-GigabitEthernet0/0/1]ip add 172.16.1.17 30
[R5-GigabitEthernet0/0/1]int L0
[R5-LoopBack0]ip add 172.16.0.5 32
[R5-LoopBack0]int L1
[R5-LoopBack1]ip add 172.16.5.5 24
[R6]int g0/0/0
[R6-GigabitEthernet0/0/0]ip add 172.16.1.18 30
[R6-GigabitEthernet0/0/0]int G0/0/1
[R6-GigabitEthernet0/0/1]ip add 172.16.1.13 30
[R6-GigabitEthernet0/0/1]int L0
[R6-LoopBack0]ip add 172.16.0.6 32
[R6-LoopBack0]int L1
[R6-LoopBack1]ip add 172.16.6.6 24
[R8]int g0/0/0
[R8-GigabitEthernet0/0/0]ip add 34.1.1.8 24
[R8-GigabitEthernet0/0/0]int L0
[R8-LoopBack0]ip add 172.16.0.8 32
[R8-LoopBack0]int L1
[R8-LoopBack1]ip add 192.168.2.8 24
2、在AS 2中配置路由协议
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]a 0
[R2-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]a 0
[R3-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
[R4]ospf 1 router-id 4.4.4.4
[R4-ospf-1]a 0
[R4-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]a 0
[R5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]a 0
[R6-ospf-1-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]network 172.16.0.0 0.0.255.255
3、配置BGP协议
[R1]bgp 1
[R1-bgp]peer 12.1.1.2 as-number 2
[R2]bgp 64512
[R2-bgp]confederation id 2--声明自己的大号
[R2-bgp]confederation peer-as 64513--声明自己的联盟兄弟
[R2-bgp]peer 12.1.1.1 as-number 1
[R2-bgp]peer 172.16.1.22 as-number 64513
[R2-bgp]peer 172.16.1.22 next-hop-local--修改下一跳为本机
[R2-bgp]peer 172.16.0.3 as-number 64512
[R2-bgp]peer 172.16.0.3 connect-interface L0--修改更新源
[R2-bgp]peer 172.16.0.3 next-hop-local
[R3]bgp 64512
[R3-bgp]confederation id 2
[R3-bgp]peer 172.16.0.2 as-number 64512
[R3-bgp]peer 172.16.0.2 connect-interface L0
[R3-bgp]peer 172.16.0.4 as-number 64512
[R3-bgp]peer 172.16.0.4 connect-interface L0
[R4]bgp 64512
[R4-bgp]confederation id 2
[R4-bgp]peer 172.16.0.3 as-number 64512
[R4-bgp]peer 172.16.0.3 connect-interface L0
[R4-bgp]peer 172.16.0.3 next-hop-local
[R5]bgp 64513
[R5-bgp]confederation id 2
[R5-bgp]confederation peer-as 64512
[R5-bgp]peer 172.16.1.21 as-number 64512
[R5-bgp]peer 172.16.1.21 next-hop-local
[R5-bgp]peer 172.16.0.6 as-number 64513
[R5-bgp]peer 172.16.0.6 connect-interface L0
[R5-bgp]peer 172.16.0.6 next-hop-local
[R6-bgp]peer 172.16.0.5 as-number 64513
[R6-bgp]peer 172.16.0.5 connect-interface L0
[R6-bgp]peer 172.16.0.7 as-number 64513
[R6-bgp]peer 172.16.0.7 connect-interface L0
[R7]bgp 64513
[R7-bgp]confederation id 2
[R7-bgp]peer 172.16.0.6 as-number 64513
[R7-bgp]peer 172.16.0.6 connect-interface L0
[R7-bgp]peer 172.16.0.6 next-hop-local
[R7-bgp]peer 34.1.1.8 as-number 3
4、将R3、R6作为反射器
[R3]bgp 64512
[R3-bgp]peer 172.16.0.2 reflect-client -- 在反射器中修改反射客户机
[R3-bgp]peer 172.16.0.4 reflect-client
[R6-bgp]peer 172.16.0.5 re
[R6-bgp]peer 172.16.0.5 reflect-client
[R6-bgp]peer 172.16.0.7 reflect-client
5、在R2汇总网段
[R2]ip route-static 172.16.0.0 16 NULL 0--防止出现环路
[R2-bgp]aggregate 172.16.0.0 16--没有抑制明细路由
6、在R1和R8之间配置隧道
[R1]int t0/0/0
[R1-Tunnel0/0/0]ip add 100.1.1.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre
[R1-Tunnel0/0/0]source 172.16.0.1
[R1-Tunnel0/0/0]destination 172.16.0.8
[R1]ip route-static 192.168.2.0 24 100.1.1.8--配置静态路由
[R8]int t0/0/0
[R8-Tunnel0/0/0]ip add 100.1.1.8 24
[R8-Tunnel0/0/0]tunnel-protocol gre
[R8-Tunnel0/0/0]source 172.16.0.8
[R8-Tunnel0/0/0]destination 172.16.0.1
[R8]ip route-static 192.168.1.0 24 100.1.1.1
测试: