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03_策略路由实验

news 2026/8/11 4:44:49

配置IP
R1

[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip ad 12.0.0.1 24
[R1-GigabitEthernet0/0/0]int g0/0/1
[R1-GigabitEthernet0/0/1]ip ad 13.0.0.1 24
[R1-GigabitEthernet0/0/1]int g0/0/2
[R1-GigabitEthernet0/0/2]ip ad 15.0.0.1 24
[R1-GigabitEthernet0/0/2]int l0
[R1-LoopBack0]ip ad 1.1.1.1 32
[R1-LoopBack0]int l1
[R1-LoopBack1]ip ad 192.168.100.1 24
[R1-LoopBack1]ospf network-type broadcast

[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip ad 24.0.0.2 24
[R2-GigabitEthernet0/0/0]int g0/0/1
[R2-GigabitEthernet0/0/1]ip ad 12.0.0.2 24
[R2-GigabitEthernet0/0/1]int l0
[R2-LoopBack0]ip ad 2.2.2.2 32
[R2-LoopBack0]int l1
[R2-LoopBack1]ip ad 192.168.20.1 24
[R2-LoopBack1]ospf network-type broadcast

[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip ad 34.0.0.3 24
[R3-GigabitEthernet0/0/0]int g0/0/1
[R3-GigabitEthernet0/0/1]ip ad 13.0.0.3 24
[R3-GigabitEthernet0/0/1]int l0
[R3-LoopBack0]ip ad 3.3.3.3 32
[R3-LoopBack0]int l1
[R3-LoopBack1]ip ad 192.168.30.1 24
[R3-LoopBack1]ospf network-type broadcast

[R4]int g0/0/0
[R4-GigabitEthernet0/0/0]ip ad 24.0.0.4 24
[R4-GigabitEthernet0/0/0]int g0/0/1
[R4-GigabitEthernet0/0/0]ip ad 34.0.0.4 24
[R4-GigabitEthernet0/0/0]int l0
[R4-LoopBack0]ip ad 192.168.1.1 24
[R4-LoopBack0]int l1
[R4-LoopBack1]ip ad 192.168.2.1 24
[R4-LoopBack1]int l2
[R4-LoopBack2]ip ad 192.168.3.1 24

[R5]int g0/0/0
[R5-GigabitEthernet0/0/0]ip ad 15.0.0.5 24
[R5-GigabitEthernet0/0/0]int l0
[R5-LoopBack0]ip ad 192.168.10.1 24
[R5-LoopBack0]int l1
[R5-LoopBack1]ip ad 192.168.11.1 24
[R5-LoopBack1]int l2
[R5-LoopBack2]ip ad 192.168.12.1 24

OSPF配置
R1

[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 12.0.0.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 13.0.0.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 192.168.100.1 0.0.0.0

[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 0
[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]network 12.0.0.2 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 192.168.20.1 0.0.0.0

[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 13.0.0.3 0.0.0.0
[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]network 192.168.30.1 0.0.0.0

BGP配置
R1

[R1]bgp 123
[R1-bgp]router-id 1.1.1.1
[R1-bgp]peer 15.0.0.5 as-number 500
[R1-bgp]peer 2.2.2.2 as-number 123
[R1-bgp]peer 2.2.2.2 connect-interface l0
[R1-bgp]peer 2.2.2.2 next-hop-local
[R1-bgp]peer 3.3.3.3 as-number 123
[R1-bgp]peer 3.3.3.3 connect-interface l0
[R1-bgp]peer 3.3.3.3 next-hop-local

[R2]bgp 123
[R2-bgp]router-id 2.2.2.2
[R2-bgp]peer 24.0.0.4 as-number 400
[R2-bgp]peer 1.1.1.1 as-number 123
[R2-bgp]peer 1.1.1.1 connect-interface l0
[R2-bgp]peer 1.1.1.1 next-hop-local

[R3]bgp 123
[R3-bgp]router-id 3.3.3.3
[R3-bgp]peer 34.0.0.4 as-number 400
[R3-bgp]peer 1.1.1.1 as-number 123
[R3-bgp]peer 1.1.1.1 connect-interface l0
[R3-bgp]peer 1.1.1.1 next-hop-local

[R4]bgp 400

[R4-bgp]router-id 4.4.4.4

[R4-bgp]peer 24.0.0.2 as-number 123

[R4-bgp]peer 34.0.0.3 as-number 123

[R5]bgp 500

[R5-bgp]router-id 5.5.5.5

[R5-bgp]peer 15.0.0.1 as-number 123

宣告BGP路由
R1

[R1]bgp 123

[R1-bgp]net 192.168.20.0 24

[R1-bgp]net 192.168.30.0 24

[R1-bgp]net 192.168.100.0 24

[R2]bgp 123

[R2-bgp]net 192.168.20.0 24

[R2-bgp]net 192.168.30.0 24

[R2-bgp]net 192.168.100.0 24

[R3]bgp 123

[R3-bgp]net 192.168.20.0 24

[R3-bgp]net 192.168.30.0 24

[R3-bgp]net 192.168.100.0 24

[R4]bgp 400

[R4-bgp]net 192.168.1.0 24

[R4-bgp]net 192.168.2.0 24

[R4-bgp]net 192.168.3.0 24

[R5]bgp 500

[R5-bgp]net 192.168.10.0 24

[R5-bgp]net 192.168.11.0 24

[R5-bgp]net 192.168.12.0 24

路由策略配置
1、使用preval策略，确保R4通过R2到达192.168.10.0/24
R4

[R4]ip ip-prefix PV permit 192.168.10.0 24
[R4]route-policy PV permit node 10
[R4-route-policy]if-match ip-prefix PV
[R4-route-policy]apply preferred-value 100
[R4-route-policy]q
[R4]route-policy PV permit node 20
[R4-route-policy]q
[R4]bgp 400
[R4-bgp]peer 24.0.0.2 route-policy PV import

2、使用AS Path策略，确保R4通过R3到达192.168.11.0/24
R4

[R4]ip ip-prefix AS permit 192.168.11.0 24
[R4]route-policy AS permit node 10
[R4-route-policy]if-match ip-prefix AS
[R4-route-policy]apply as-path 123 overwrite
[R4-route-policy]q
[R4]bgp 400
[R4-bgp]peer 34.0.0.3 route-policy PV import

3、配置MED策略，确保R4通过R3到达192.168.12.0/24
R2

[R2]ip ip-prefix MED permit 192.168.12.0 24
[R2]route-policy MED permit node 10
[R2-route-policy]if-match ip-prefix MED
[R2-route-policy]apply cost 200
[R2-route-policy]q
[R2]route-policy MED permit node 20
[R2]bgp 123
[R2-bgp]peer 24.0.0.4 route-policy MED export

[R3]ip ip-prefix MED permit 192.168.12.0 24
[R3]route-policy MED permit node 10
[R3-route-policy]if-match ip-prefix MED
[R3-route-policy]apply cost 200
[R3-route-policy]q
[R3]route-policy MED permit node 20
[R3]bgp 123
[R3-bgp]peer 34.0.0.4 route-policy MED export

4、使用Local Preference策略，确保R1通过R2到达192.168.1.0/24
R1

[R1]ip ip-prefix LP1 permit 192.168.1.0 24
[R1]route-policy LP1 permit node 10
[R1-route-policy]if-match ip-prefix LP
[R1-route-policy]apply local-preference 200
[R1-route-policy]q
[R1]route-policy LP1 permit node 20
[R1]bgp 123
[R1-bgp]peer 2.2.2.2 route-policy LP import

5、使用Local Preference策略，确保R1通过R3到达192.168.2.0/24
R1

[R1]ip ip-prefix LP2 permit 192.168.2.0 24
[R1]route-policy LP2 permit node 10
[R1-route-policy]if-match ip-prefix LP2
[R1-route-policy]apply local-preference 200
[R1-route-policy]q
[R1]route-policy LP1 permit node 20
[R1]bgp 123
[R1-bgp]peer 3.3.3.3 route-policy LP import

6、配置负载均衡，确保R1通过R2和R3到达192.168.3.0/24
R1

[R1]bgp 123
[R1-bgp]maximum load-balancing 2

7、使用As策略，AS 500不接受任何始发于AS 123的路由
R1

[R1]ip as-path-filter 1 deny ^$
[R1]ip as-path-filter 1 permit .*
[R1]bgp 123
[R1-bgp]peer 15.0.0.5 as-path-filter 1 export

8、使用自定义Community策略，确保192.168.3.0/24路由不会被发布到AS 500
R4

[R4]route-policy com permit node 10
[R4-route-policy]apply community 400:500
[R4]bgp 400
[R4-bgp]network 192.168.3.0 24 route-policy com
[R4-bgp]peer 24.0.0.2 advertise-community
[R4-bgp]peer 34.0.0.3 advertise-community

[R2]bgp 123
[R2-bgp]peer 1.1.1.1 advertise-community

[R3]bgp 123
[R3-bgp]peer 1.1.1.1 advertise-community

[R1]bgp 123
[R1-bgp]peer 15.0.0.5 advertise-community
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版权声明：本文为CSDN博主「shushdsjsjjd」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/shushdsjsjjd/article/details/148085064

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