BGP综合实验

一、实验拓扑

二、实验要求

1，AS1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中存在俩个环回，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互相通讯
2，整个AS2的IP地址为172.16.0.0/16，请合理划分
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、网段划分

172.16.0.0/16
	172.16.0.0/24
		172.16.1.0/24---MA
			172.16.1.0/29
			172.16.1.8/29
			172.16.1.24/29
			172.16.1.32/29
			172.16.1.40/29
			172.16.1.48/29
			172.16.1.56/29
R2:172.16.2.0/24---P2P
R3:172.16.3.0/24---P2P
R4:172.16.4.0/24
R5:172.16.5.0/24
R6:172.16.6.0/24

四、实验步骤

1、配置接口IP地址与环回地址（依次类推）

[r1]int g 0/0/0
[r1-GigabitEthernet0/0/0]ip a 12.0.0.1 24
[r1-GigabitEthernet0/0/0]int lo0
[r1-LoopBack0]ip a 192.168.1.1 24
[r1-LoopBack0]int lo1
[r1-LoopBack1]ip a 10.0.0.1 24

2、AS2配置OSPF

[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

3、配置BGP，建立对等体

[r1]bgp 1 
[r1-bgp]route-select
[r1-bgp]router-id 1.1.1.1  
[r1-bgp]peer 12.0.0.2 as 2

[r2]bgp 64512  
[r2-bgp]route-select
[r2-bgp]router-id 2.2.2.2  
[r2-bgp]confederation id 2   
[r2-bgp]confederation peer-as 64513
[r2-bgp]peer 12.0.0.1 as 1  
[r2-bgp]peer 172.16.3.1 as 64512   
[r2-bgp]peer 172.16.3.1 connect-interface LoopBack 0   
[r2-bgp]peer 172.16.5.1 as 64513  
[r2-bgp]peer 172.16.5.1 connect-interface LoopBack 0
[r2-bgp]peer 172.16.5.1 ebgp-max-hop 2  
[r2-bgp]peer 172.16.3.1 next-hop-local
[r2-bgp]peer 172.16.5.1 next-hop-local

[r3]bgp 64512
[r3-bgp]router-id 3.3.3.3 
[r3-bgp]confederation id 2
[r3-bgp]peer 172.16.2.1 as 64512  
[r3-bgp]peer 172.16.2.1 connect-interface LoopBack 0 
[r3-bgp]peer 172.16.4.1 as 64512 
[r3-bgp]peer 172.16.4.1 connect-interface LoopBack 0

[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 172.16.3.1 as 64512
[r4-bgp]peer 172.16.3.1 connect-interface LoopBack 0
[r4-bgp]peer 172.16.7.1 as 64513
[r4-bgp]peer 172.16.7.1 connect-interface LoopBack 0
[r4-bgp]peer 172.16.7.1 ebgp-max-hop 2

[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 172.16.2.1 as 64512
[r5-bgp]peer 172.16.2.1 connect-interface LoopBack 0
[r5-bgp]peer 172.16.2.1 ebgp-max-hop 2
[r5-bgp]peer 172.16.6.1 as 64513
[r5-bgp]peer 172.16.6.1 connect-interface LoopBack 0

[r6]bgp 64513
[r6-bgp]router-id 6.6.6.6   
[r6-bgp]confederation id 2
[r6-bgp]peer 172.16.5.1 as 64513  
[r6-bgp]peer 172.16.5.1 connect-interface LoopBack 0
[r6-bgp]peer 172.16.7.1 as 64513
[r6-bgp]peer 172.16.7.1 connect-interface LoopBack 0

[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 172.16.6.1 as 64513
[r7-bgp]peer 172.16.6.1 connect-interface LoopBack 0  
[r7-bgp]peer 172.16.4.1 as 64512 
[r7-bgp]peer 172.16.4.1 connect-interface LoopBack 0
[r7-bgp]peer 172.16.4.1 ebgp-max-hop 2
[r7-bgp]peer 78.0.0.2 as 3
[r7-bgp]peer 172.16.4.1 next-hop-local
[r7-bgp]peer 172.16.6.1 next-hop-local

[r8]bgp 3   
[r8-bgp]router-id 8.8.8.8    
[r8-bgp]peer 78.0.0.1 as 2

4、发布路由

[r1]bgp 1
[r1-bgp]network 10.0.0.0 24

[r8]bgp 3
[r8-bgp]network 11.0.0.0 24

5、配置路由反射器

[r3]bgp 64512    
[r3-bgp]peer 172.16.2.1 reflect-client 

[r6]bgp 64513
[r6-bgp]peer 172.16.7.1 reflect-client

6、做空接口、汇总以及宣告

[r2]ip route-static 172.16.0.0 21 NULL 0   
[r2]bgp 64512 
[r2-bgp]network 172.16.0.0 21

[r7]ip route-static 172.16.0.0 22 NULL 0 
[r7]bgp 64513

7、建立GRE隧道

[r1]int t0/0/0
[r1-Tunnel0/0/0]ip a 192.168.10.1 24  
[r1-Tunnel0/0/0]tunnel-protocol gre  
[r1-Tunnel0/0/0]source 10.0.0.1
[r1-Tunnel0/0/0]destination 11.0.0.1  
[r1]ip route-static 192.168.1.0 24 99.0.0.2

[r8]int t0/0/0
[r8-Tunnel0/0/0]ip a 192.168.10.2 24 
[r8-Tunnel0/0/0]tunnel-protocol gre  
[r8-Tunnel0/0/0]source 11.0.0.1
[r8-Tunnel0/0/0]destination 10.0.0.1
[r8]ip route-static 192.168.2.0 24 99.0.0.1

8、测试

[R1]ping -a 192.168.1.1 192.168.2.1
  PING 192.168.2.1: 56  data bytes, press CTRL_C to break
    Reply from 192.168.2.1: bytes=56 Sequence=1 ttl=255 time=110 ms
    Reply from 192.168.2.1: bytes=56 Sequence=2 ttl=255 time=50 ms
    Reply from 192.168.2.1: bytes=56 Sequence=3 ttl=255 time=40 ms
    Reply from 192.168.2.1: bytes=56 Sequence=4 ttl=255 time=40 ms
    Reply from 192.168.2.1: bytes=56 Sequence=5 ttl=255 time=30 ms

  --- 192.168.2.1 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 30/54/110 ms

[R1]