一、实验拓扑
二、实验要求
1.AS1中存在两个环回，一个地址为192.168.1.0/24，该地址不能在任何协议中宣告；AS3中存在两个环回，一个地址为192.168.2.0/24，该地址不能在任何协议中宣告，最终要求这两个环回可以ping通；
2.整个AS2的IP地址为172.16.0.0/16，请合理划分；并且其内部配置0SPF协议；
3.AS间的骨干链路IP地址随意定制；
4.使用BGP协议让整个网络所有设备的环回可以互相访问；
5.减少路由条目数量，避免环路出现。
三、实验思路
1、划分网段配置IP
2、启用ospf
3、配置bgp
4、宣告路由
5、创建空接口防止环路
6、创建隧道，链接R1和R8的另外一个环回
四、实验步骤
1.配置IP地址
[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-GigabitEthernet0/0/2]int l0
[R2-LoopBack0]ip add 172.16.0.2 32
[R2]int g0/0/1
[R2-GigabitEthernet0/0/1]ip add 172.16.1.1 30
[R2-GigabitEthernet0/0/1]int g0/0/2
[R2-GigabitEthernet0/0/2]ip add 172.16.1.21 30
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip add 172.16.1.2 30
[R3-GigabitEthernet0/0/0]int g 0/0/1
[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
[r5-LoopBack1]
[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
[r7]int g0/0/1
[r7-GigabitEthernet0/0/1]ip add 172.16.1.14 30
[r7-GigabitEthernet0/0/1]int g0/0/0
[r7-GigabitEthernet0/0/0]ip add 172.16.1.10 30
[r7-GigabitEthernet0/0/0]int g0/0/2
[r7-GigabitEthernet0/0/2]ip add 34.1.1.7 24
[r7-GigabitEthernet0/0/2]
[r7-GigabitEthernet0/0/2]int l0
[r7-LoopBack0]ip add 172.16.0.7 32
[r7-LoopBack0]int l1
[r7-LoopBack1]ip add 192.168.2.8 24
[r8]int g0/0/0
[r8-GigabitEthernet0/0/0]ip add 34.1.1.8 24
[r8-GigabitEthernet0/0/0]in l0
[r8-LoopBack0]ip add 172.16.0.8 32
[r8-LoopBack0]int l1
[r8-LoopBack1]ip add 172.16.7.8 242.启用ospf
划分AS2的IP地址为172.16.0.0/16，启用ospf宣告时用172.16.0.0 0.0.255.255进行宣告
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]a 0
[R2-ospf-1-area-0.0.0.0]net 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]net 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]net 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]net 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]net 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 172.16.0.0 0.0.255.255
3.配置bgp
- 启动BGP进程
- 配置RID
- 建立邻居
[R1]bgp 1
[R1-bgp]router-id 1.1.1.1
[R1-bgp]peer 12.1.1.2 as-number 2
[R2]bgp 64512
[R2-bgp]router-id 2.2.2.2
[R2-bgp]confederation id 2
[R2-bgp]peer 12.1.1.1 as-number 1
[R2-bgp]peer 172.16.0.3 as-number 64512
[R2-bgp]peer 172.16.0.3 connect-interface l0
[R2-bgp]confederation peer-as 64513
[R2-bgp]peer 172.16.0.5 as-number 64513
[R2-bgp]peer 172.16.0.5 connect-interface l0
[R2-bgp]peer 172.16.0.5 ebgp-max-hop
[R3]bgp 64512
[R3-bgp]router-id 3.3.3.3
[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]router-id 4.4.4.4
[r4-bgp]confederation id 2
[r4-bgp]confederation peer-as 64513
[r4-bgp]peer 172.16.0.3 as-number 64512
[r4-bgp]peer 172.16.0.3 connect-interface l0
[r4-bgp]peer 172.16.0.7 as-number 64513
[r4-bgp]peer 172.16.0.7 connect-interface l0
[r4-bgp]peer 172.16.0.7 ebgp-max-hop
[r5]bgp 64513
[r5-bgp]router-id 5.5.5.5
[r5-bgp]confederation id 2
[r5-bgp]confederation peer-as 64512
[r5-bgp]peer 172.16.0.2 as-number 64512
[r5-bgp]peer 172.16.0.2 connect-interface l0
[r5-bgp]peer 172.16.0.2 ebgp-max-hop
[r5-bgp]peer 172.16.0.6 as-number 64513
[r5-bgp]peer 172.16.0.6 connect-interface l0
[r6]bgp 64513
[r6-bgp]router-id 6.6.6.6
[r6-bgp]confederation id 2
[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]router-id 7.7.7.7
[r7-bgp]confederation id 2
[r7-bgp]confederation peer-as 64512
[r7-bgp]peer 172.16.0.6 as-number 64513
[r7-bgp]peer 172.16.0.6 connect-interface l0
[r7-bgp]peer 172.16.0.4 as-number 64512
[r7-bgp]peer 172.16.0.4 connect-interface l0
[r7-bgp]peer 172.16.0.4 ebgp-max-hop
[r7-bgp]peer 34.1.1.8 as-number 3
[r8]bgp 3
[r8-bgp]router-id 8.8.8.8
[r8-bgp]peer 34.1.1.7 as-number 2
4.宣告路由
[R1]bgp 1
[R1-bgp]net 172.16.0.1 32
[R2]bgp 64512
[R2-bgp]peer 172.16.0.3 next-hop-local
[R2-bgp]peer 172.16.0.5 next-hop-local
[R3]bgp 64512
[R3-bgp]peer 172.16.0.2 reflect-client
[r6]bgp 64513
[r6-bgp]peer 172.16.0.7 re
[r6-bgp]peer 172.16.0.7 reflect-client
[r7]bgp 64513
[r7-bgp]peer 172.16.0.4 next-hop-local
[r7-bgp]peer 172.16.0.6 next-hop-local
[r8]bgp 3
[r8-bgp]net 172.16.0.8 325.创建空接口防止环路
[R2]ip route-static 172.16.0.0 16 NULL 0
[R2]bgp 64512
[R2-bgp]net 172.16.0.0 16
[r7]ip route-static 172.16.0.0 16 NULL 0
[r7]bgp 64513
[r7-bgp]net 172.16.0.0 166. 创建隧道，链接R1和R8的另外一个环回
[R1]int t0/0/0
[R1-Tunnel0/0/0]ip add 192.168.3.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre
[R1-Tunnel0/0/0]source 192.168.1.1
[R1-Tunnel0/0/0]destination 192.168.2.8
[R1]p route-static 192.168.2.0 24 192.168.3.2
[r8]int t0/0/0
[r8-Tunnel0/0/0]tunnel-protocol gre
[r8-Tunnel0/0/0]source 192.168.2.8
[r8-Tunnel0/0/0]destination 192.168.1.1
[r8-Tunnel0/0/0]q
[r8]ip route-static 192.168.1.0 24 192.168.3.1
