BGP实验

一、配置IP

二、配置AS2 的 OSPF
[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]a 0
[r2-ospf-1-area-0.0.0.0]net 23.1.1.1 0.0.0.255
[r2-ospf-1-area-0.0.0.0]net 2.2.2.2 0.0.0.0

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]a 0
[r3-ospf-1-area-0.0.0.0]net 23.1.1.2 0.0.0.255
[r3-ospf-1-area-0.0.0.0]net 3.3.3.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]net 34.1.1.1 0.0.0.255

[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]a 0
[r4-ospf-1-area-0.0.0.0]net 34.1.1.2 0.0.0.255
[r4-ospf-1-area-0.0.0.0]net 4.4.4.4 0.0.0.0

三、配置AS1 AS2间BGP
[r1]bgp 1
[r1-bgp]router-id 1.1.1.1
[r1-bgp]peer 12.1.1.2 as
[r1-bgp]peer 12.1.1.2 as-number 2

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.1.1.1 as-number 1

四、配置IGP
1、R2,R3,R4
[r3]bgp 2
[r3-bgp]router-id 3.3.3.3
[r3-bgp]peer 2.2.2.2 as-number 2
[r3-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r3-bgp]peer 4.4.4.4 as-number 2
[r3-bgp]peer 4.4.4.4 connect-interface LoopBack 0

[r4]bgp 2
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 3.3.3.3 as-n
[r4-bgp]peer 3.3.3.3 as-number 2
[r4-bgp]peer 3.3.3.3 connect-interface LoopBack 0

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 3.3.3.3 as-number 2
[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0
五、R4与R5建邻
1、配路由
[r5]ip route-static 4.4.4.0 24 45.1.1.1
[r5]ip route-static 4.4.4.0 24 54.1.1.1

[r4]ip route-static 5.5.5.5 24 45.1.1.2
[r4]ip route-static 5.5.5.5 24 54.1.1.2

2、配置BGP
[r5]bgp 3
[r5-bgp]router-id 5.5.5.5
[r5-bgp]peer 4.4.4.4 as-number 2
[r5-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r5-bgp]peer 4.4.4.4 ebgp-max-hop 2

[r4]bgp 2
[r4-bgp]peer 5.5.5.5 as-number 3
[r4-bgp]peer 5.5.5.5 connect-interface LoopBack 0
[r4-bgp]peer 5.5.5.5 ebgp-max-hop 2



六、宣告路由
[r1]bgp 1
[r1-bgp]net 192.168.1.0 24

[r2]bgp 2
[r2-bgp]peer 3.3.3.3 next-hop-local

R2与R4建邻

[r4]bgp 2
[r4-bgp]peer 2.2.2.2 as-number 2
[r4-bgp]peer 2.2.2.2 connect-interface LoopBack 0

[r2]bgp 2
[r2-bgp]peer 4.4.4.4 as-number 2
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r2-bgp]peer 4.4.4.4 next-hop-local

[r4-bgp]peer 3.3.3.3 next-hop-local
[r4-bgp]peer 2.2.2.2 next-hop-local

[r3-bgp]peer 2.2.2.2 next-hop-local

[r5-bgp]net 192.168.5.0 24
[r4-bgp]net 192.168.4.0 24
[r3-bgp]net 192.168.3.0 24
[r2-bgp]net 192.168.2.0 24