BGP联邦实验

一.搭建拓扑图

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互相通讯 AS1的另一个环回为10.0.0.0/24，AS3的另一个环回为11.0.0.0/24

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.配置

1.接口IP配置

R1

[R1]interface g0/0/0 [R1-GigabitEthernet0/0/0]ip address 172.16.12.1 24 [R1-GigabitEthernet0/0/0]q [R1]interface LoopBack 0 [R1-LoopBack0]ip address 192.168.1.1 24 [R1-LoopBack0]q [R1]interface LoopBack 1 [R1-LoopBack1]ip address 10.0.0.1 24 [R1-LoopBack1]q

R2

[R2]interface g0/0/0 [R2-GigabitEthernet0/0/0]ip address 172.16.12.2 24 [R2-GigabitEthernet0/0/0]q [R2]undo info-center enable Info: Information center is disabled. [R2]interface g0/0/1 [R2-GigabitEthernet0/0/1]ip address 172.16.23.1 24 [R2-GigabitEthernet0/0/1]q [R2]interface g0/0/2 [R2-GigabitEthernet0/0/2]ip address 172.16.25.1 24 [R2-GigabitEthernet0/0/2]q [R2]interface LoopBack 0 [R2-LoopBack0]ip address 2.2.2.2 32 [R2-LoopBack0]q

R3

[R3]interface g0/0/0 [R3-GigabitEthernet0/0/0]ip address 172.16.23.2 24 [R3-GigabitEthernet0/0/0]q [R3]interface g0/0/1 [R3-GigabitEthernet0/0/1]ip address 172.16.34.1 24 [R3-GigabitEthernet0/0/1]q [R3]interface LoopBack 0 [R3-LoopBack0]ip address 3.3.3.3 32 [R3-LoopBack0]q

R4

[R4]interface g0/0/0 [R4-GigabitEthernet0/0/0]ip address 172.16.34.2 24 [R4-GigabitEthernet0/0/0]q [R4]interface g0/0/1 [R4-GigabitEthernet0/0/1]ip address 172.16.47.1 24 [R4-GigabitEthernet0/0/1]q [R4]interface LoopBack 0 [R4-LoopBack0]ip address 4.4.4.4 32 [R4-LoopBack0]q

R5

[R5]interface g0/0/0 [R5-GigabitEthernet0/0/0]ip address 172.16.25.2 24 [R5-GigabitEthernet0/0/0]q [R5]interface g0/0/1 [R5-GigabitEthernet0/0/1]ip address 172.16.56.1 24 [R5-GigabitEthernet0/0/1]q [R5] interface LoopBack 0 [R5-LoopBack0] ip address 5.5.5.5 32 [R5-LoopBack0]q

R6

[R6]interface g0/0/0 [R6-GigabitEthernet0/0/0]ip address 172.16.56.2 24 [R6-GigabitEthernet0/0/0]q [R6]interface g0/0/1 [R6-GigabitEthernet0/0/1]ip address 172.16.67.1 24 [R6-GigabitEthernet0/0/1]q [R6]interface LoopBack 0 [R6-LoopBack0]ip address 6.6.6.6 32 [R6-LoopBack0]q

R7

[R7]interface g0/0/0 [R7-GigabitEthernet0/0/0]ip address 172.16.67.2 24 [R7-GigabitEthernet0/0/0]q [R7]interface g0/0/1 [R7-GigabitEthernet0/0/1]ip address 172.16.47.2 24 [R7-GigabitEthernet0/0/1]q [R7]interface g0/0/2 [R7-GigabitEthernet0/0/2]ip address 172.16.78.1 24 [R7-GigabitEthernet0/0/2]q [R7]interface LoopBack 0 [R7-LoopBack0]ip address 7.7.7.7 32 [R7-LoopBack0]q

R8

[R8]interface g0/0/0 [R8-GigabitEthernet0/0/0]ip address 172.16.78.2 24 [R8-GigabitEthernet0/0/0]q [R8]interface LoopBack 0 [R8-LoopBack0]ip address 192.168.2.1 24 [R8-LoopBack0]q [R8]interface LoopBack 1 [R8-LoopBack1]ip address 11.0.0.1 24 [R8-LoopBack1]q

2.AS2 内部的 OSPF

R2

[R2]ospf 1 router-id 2.2.2.2 [R2-ospf-1]area 0 [R2-ospf-1-area-0.0.0.0]network 172.16.23.0 0.0.0.255 [R2-ospf-1-area-0.0.0.0]network 172.16.34.0 0.0.0.255 [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]q [R2-ospf-1]q

R3

[R3]ospf 1 router-id 3.3.3.3 [R3-ospf-1]area 0 [R3-ospf-1-area-0.0.0.0]network 172.16.23.0 0.0.0.255 [R3-ospf-1-area-0.0.0.0]network 172.16.34.0 0.0.0.255 [R3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0 [R3-ospf-1-area-0.0.0.0]q [R3-ospf-1]q

R4

[R4]ospf 1 router-id 4.4.4.4 [R4-ospf-1] area 0 [R4-ospf-1-area-0.0.0.0]network 172.16.34.0 0.0.0.255 [R4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.0 [R4-ospf-1-area-0.0.0.0]q [R4-ospf-1]q

R5

[R5]ospf 1 router-id 5.5.5.5 [R5-ospf-1]area 0 [R5-ospf-1-area-0.0.0.0]network 172.16.56.0 0.0.0.255 [R5-ospf-1-area-0.0.0.0]network 172.16.67.0 0.0.0.255 [R5-ospf-1-area-0.0.0.0]network 5.5.5.5 0.0.0.0 [R5-ospf-1-area-0.0.0.0]q [R5-ospf-1]q

R6

[R6]ospf 1 router-id 6.6.6.6 [R6-ospf-1]area 0 [R6-ospf-1-area-0.0.0.0]network 172.16.56.0 0.0.0.255 [R6-ospf-1-area-0.0.0.0] network 172.16.67.0 0.0.0.255 [R6-ospf-1-area-0.0.0.0]network 6.6.6.6 0.0.0.0 [R6-ospf-1-area-0.0.0.0]q [R6-ospf-1]q

R7

[R7]ospf 1 router-id 7.7.7.7 [R7-ospf-1]area 0 [R7-ospf-1-area-0.0.0.0]network 172.16.67.0 0.0.0.255 [R7-ospf-1-area-0.0.0.0]network 7.7.7.7 0.0.0.0 [R7-ospf-1-area-0.0.0.0]q [R7-ospf-1]q

3.配 BGP 联邦（AS 内部 IBGP + AS 间联邦 EBGP）

R2

[R2]bgp 64512 [R2-bgp]router-id 2.2.2.2 [R2-bgp]confederation id 2 [R2-bgp]confederation peer-as 64513 [R2-bgp]peer 3.3.3.3 as-number 64512 [R2-bgp]peer 3.3.3.3 connect-interface LoopBack 0 [R2-bgp]peer 4.4.4.4 as-number 64512 [R2-bgp]peer 4.4.4.4 connect-interface LoopBack 0 [R2-bgp]peer 172.16.25.2 as-number 64513 [R2-bgp]q

R3

[R3]bgp 64512 [R3-bgp] router-id 3.3.3.3 [R3-bgp]confederation id 2 [R3-bgp]peer 2.2.2.2 as-number 64512 [R3-bgp]peer 2.2.2.2 connect-interface LoopBack 0 [R3-bgp]peer 4.4.4.4 as-number 64512 [R3-bgp]peer 4.4.4.4 connect-interface LoopBack 0 [R3-bgp]q

R4

[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 2.2.2.2 as-number 64512 [R4-bgp] peer 2.2.2.2 connect-interface LoopBack 0 [R4-bgp]peer 3.3.3.3 as-number 64512 [R4-bgp]peer 3.3.3.3 connect-interface LoopBack 0 [R4-bgp]peer 172.16.47.2 as-number 64513 [R4-bgp]quit

R5

[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 6.6.6.6 as-number 64513 [R5-bgp]peer 6.6.6.6 connect-interface LoopBack 0 [R5-bgp]peer 7.7.7.7 as-number 64513 [R5-bgp]peer 7.7.7.7 connect-interface LoopBack 0 [R5-bgp]peer 172.16.25.1 as-number 64512 [R5-bgp]q

R6

[R6]bgp 64513 [R6-bgp]router-id 6.6.6.6 [R6-bgp]confederation id 2 [R6-bgp]peer 5.5.5.5 as-number 64513 [R6-bgp]peer 5.5.5.5 connect-interface LoopBack 0 [R6-bgp] peer 7.7.7.7 as-number 64513 [R6-bgp]peer 7.7.7.7 connect-interface LoopBack 0 [R6-bgp]q

R7

[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 5.5.5.5 as-number 64513 [R7-bgp]peer 5.5.5.5 connect-interface LoopBack 0 [R7-bgp]peer 6.6.6.6 as-number 64513 [R7-bgp]peer 6.6.6.6 connect-interface LoopBack 0 [R7-bgp]peer 172.16.47.1 as-number 64512 [R7-bgp]q

R1

[R1]bgp 1 [R1-bgp]router-id 1.1.1.1 [R1-bgp]peer 172.16.12.2 as-number 2 [R1-bgp]network 10.0.0.0 24 [R1-bgp]network 192.168.1.0 24 [R1-bgp]q

R2（对接AS 1）

[R2]bgp 64512 [R2-bgp]peer 172.16.12.1 as-number 1 [R2-bgp]q

R7（对接AS 3）

[R7]bgp 64513 [R7-bgp]peer 172.16.78.2 as-number 3 [R7-bgp]q

R8

[R8]bgp 3 [R8-bgp]router-id 8.8.8.8 [R8-bgp]peer 172.16.78.1 as-number 2 [R8-bgp]network 11.0.0.0 24 [R8-bgp]network 192.168.2.0 24 [R8-bgp]q

四.检查验证