使用分发列表过滤BGP路由
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R1(config)#router bgp 64512
R1(config-router)#no auto-summary
R1(config-router)#net 172.16.255.0 mask 255.255.255.252
R1(config-router)#net 172.16.0.1 mask 255.255.255.252
R1(config-router)#net 172.16.0.0 mask 255.255.255.0
R1(config-router)#net 172.16.1.0 mask 255.255.255.0
R1(config-router)#net 172.16.2.0 mask 255.255.255.0
R1(config-router)#net 172.16.3.0 mask 255.255.255.0
R1(config-router)#nei 172.16.255.2 remote 64512
R2(config-if)#router bgp 64512
R2(config-router)#net 172.16.255.0 mask 255.255.255.252
R2(config-router)#net 10.1.255.0 mask 255.255.255.252
R2(config-router)#nei 172.16.255.1 remote 64512
R2(config-router)#nei 10.1.255.2 remote 64513
R3(config-if)#router bgp 64513
R3(config-router)#net 10.1.255.0 mask 255.255.255.252
R3(config-router)#nei 10.1.255.1 remote 64512 |
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R3#sh ip route
…………
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
B 172.16.255.0/30 [20/0] via 10.1.255.1, 00:08:58
B 172.16.0.0/24 [20/0] via 10.1.255.1, 00:08:58
B 172.16.1.0/24 [20/0] via 10.1.255.1, 00:08:58
B 172.16.2.0/24 [20/0] via 10.1.255.1, 00:08:58
B 172.16.3.0/24 [20/0] via 10.1.255.1, 00:08:58
10.0.0.0/30 is subnetted, 1 subnets
C 10.1.255.0 is directly connected, Serial1/0 |
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R2(config)#access-list 1 deny 172.16.0.0 0.0.0.255
R2(config)#access-list 1 deny 172.16.1.0 0.0.0.255
R2(config)#access-list 1 per any （其它路由都不拒绝）
R2(config-router)#nei 10.1.255.2 distribute-list 1 out （对目标邻居应用分发列表） |
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R3#clear ip bgp * soft （软涮新一下BGP数据库）
R3#sh ip route
………………
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
B 172.16.255.0/30 [20/0] via 10.1.255.1, 00:17:19
B 172.16.2.0/24 [20/0] via 10.1.255.1, 00:17:19
B 172.16.3.0/24 [20/0] via 10.1.255.1, 00:17:19
10.0.0.0/30 is subnetted, 1 subnets
C 10.1.255.0 is directly connected, Serial1/0
R3# |
本文出自 “超越技术成就价值” 博客，请务必保留此出处http://chinaittrain.blog.51cto.com/672109/273886
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