
一、IP配置
R1:

R2:

R3:

R4:

R5:

R6:

R7:

R8:

二、OSPF
LSDB表:

三、BGP建邻
R1:
[R1]bgp 1
[R1-bgp]peer 12.1.1.2 as-number 2
R2:
[R2]bgp 64512
[R2-bgp]confederation id 2
[R2-bgp]confederation peer-as 64513
[R2-bgp]peer 12.1.1.1 as-number 1
[R2-bgp]peer 3.3.3.3 as-number 64512
[R2-bgp]peer 3.3.3.3 connect-interface l0
[R2-bgp]peer 3.3.3.3 next-hop-local
[R2-bgp]peer 5.5.5.5 as-number 64513
[R2-bgp]peer 5.5.5.5 connect-interface l0
[R2-bgp]peer 5.5.5.5 next-hop-local
[R2-bgp]peer 5.5.5.5 ebgp-max-hop
R3:
[R3]bgp 64512
[R3-bgp]confederation id 2
[R3-bgp]peer 2.2.2.2 as-number 64512
[R3-bgp]peer 2.2.2.2 connect-interface l0
[R3-bgp]peer 4.4.4.4 as-number 64512
[R3-bgp]peer 4.4.4.4 connect-interface l0
R4:
[R4]bgp 64512
[R4-bgp]con
[R4-bgp]confederation id 2
[R4-bgp]peer 3.3.3.3 as-number 64512
[R4-bgp]peer 3.3.3.3 connect-interface l0
R5:
[R5]bgp 64513
[R5-bgp]confederation id 2
[R5-bgp]confederation peer-as 64512
[R5-bgp]peer 2.2.2.2 as-number 64512
[R5-bgp]peer 2.2.2.2 connect-interface l0
[R5-bgp]peer 2.2.2.2 next-hop-local
[R5-bgp]peer 2.2.2.2 ebgp-max-hop
[R5-bgp]peer 6.6.6.6 as-number 64513
[R5-bgp]peer 6.6.6.6 connect-interface l0
[R5-bgp]peer 6.6.6.6 next-hop-local
R6:
[R6]bgp 64513
[R6-bgp]peer 5.5.5.5 as-number 64513
[R6-bgp]peer 5.5.5.5 connect-interface l0
[R6-bgp]confederation id 2
[R6-bgp]peer 7.7.7.7 as-number 64513
[R6-bgp]peer 7.7.7.7 connect-interface l0
R7:
[R7]bgp 64513
[R7-bgp]confederation id 2
[R7-bgp]peer 6.6.6.6 as-number 64513
[R7-bgp]peer 6.6.6.6 connect-interface l0
[R7-bgp]peer 6.6.6.6 next-hop-local
[R7-bgp]peer 34.1.1.2 as-number 3
R8:
[R8]bgp 3
[R8-bgp]peer 34.1.1.1 as-number 2
四、宣告环回:
[R1-bgp]net 1.1.1.1 32
[R8-bgp]net 8.8.8.8 32
五、设置反射器
[R3-bgp]peer 4.4.4.4 reflect-client
[R6-bgp]peer 7.7.7.7 reflect-client
六、宣告业务网段
[R3-bgp]net 172.16.3.0 24
[R4-bgp]net 172.16.4.0 24
[R5-bgp]net 172.16.5.0 24
[R6-bgp]net 172.16.6.0 24
[R7-bgp]net 172.16.7.0 24
七、手动聚合路由
[R3-bgp]aggregate 172.16.0.0 16 detail-suppressed
[R4-bgp]aggregate 172.16.0.0 16 detail-suppressed
[R5-bgp]aggregate 172.16.0.0 16 detail-suppressed
[R6-bgp]aggregate 172.16.0.0 16 detail-suppressed
[R7-bgp]aggregate 172.16.0.0 16 detail-suppressed
八、防环
[R3]ip route-static 172.16.0.0 16 NULL 0
[R4]ip route-static 172.16.0.0 16 NULL 0
[R5]ip route-static 172.16.0.0 16 NULL 0
[R6]ip route-static 172.16.0.0 16 NULL 0
[R7]ip route-static 172.16.0.0 16 NULL 0
九、利用隧道让R1和R8的业务网段ping通
[R1]int Tunnel 0/0/0
[R1-Tunnel0/0/0]ip add 10.1.1.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre
[R1-Tunnel0/0/0]source 1.1.1.1
[R1-Tunnel0/0/0]destination 8.8.8.8
[R8]int Tunnel 0/0/0
[R8-Tunnel0/0/0]ip add 10.1.1.2 24
[R8-Tunnel0/0/0]tunnel-protocol gre
[R8-Tunnel0/0/0]source 8.8.8.8
[R8-Tunnel0/0/0]destination 1.1.1.1
[R1]ip route-static 192.168.2.0 24 10.1.1.2
[R8]ip route-static 192.168.1.0 24 10.1.1.1
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