题干与题目要求：

实验步骤：

(1) ip配置与拓扑图搭建

（2）配置ospf

r2:

r3:

r4:

r5 r6同理

（3）BGP联邦搭建

[r2]bgp 10
[r2-bgp]router-id 2.2.
[r2-bgp]router-id 2.2.2.2
[r2-bgp]confederation id 2
[r2-bgp]confederation peer-as 11
[r2-bgp]peer 172.16.96.1 as-number 10
[r2-bgp]peer 172.16.96.1 connect-interface lo
[r2-bgp]peer 172.16.96.1 connect-interface LoopBack0
[r2-bgp]peer 172.16.160.0 as-number 11
[r2-bgp]peer 172.16.160.0 ebgp-max-hop 2
[r2-bgp]peer 172.16.160.0 connect-interface lo
[r2-bgp]peer 172.16.160.0 connect-interface LoopBack 0
[r2-bgp]peer 100.1.12.1 as-number 1
[r2-bgp]peer 100.1.12.1 ebgp-max-hop 2
[r2-bgp]
[r2-bgp]ipv4-family unicast
[r2-bgp-af-ipv4]undo synchronization
[r2-bgp-af-ipv4]network 100.1.12.0
[r2-bgp-af-ipv4]network 100.1.12.0
[r2-bgp-af-ipv4]import-route static
[r2-bgp-af-ipv4]import-route ospf 1
[r2-bgp-af-ipv4]peer 172.16.96
[r2-bgp-af-ipv4]peer 172.16.96.1 enable
[r2-bgp-af-ipv4]peer 172.16.160.1 enable
[r2-bgp-af-ipv4]peer 100.1.12.1 enabl
[r2-bgp-af-ipv4]peer 100.1.12.1 enable

r3 r4 r5 r6 r7同理配置即可
剩下测试连通性即可