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- 配置各接口所属VLAN
[LSW1]vlan batch 12 13 [LSW1-GigabitEthernet0/0/2]port link-type trunk [LSW1-GigabitEthernet0/0/2]port trunk allow-pass vlan 12 [LSW1-GigabitEthernet0/0/3]port link-type trunk [LSW1-GigabitEthernet0/0/3]port trunk allow-pass vlan 13 [LSW2]vlan batch 12 24 [LSW2-GigabitEthernet0/0/1]port link-type trunk [LSW2-GigabitEthernet0/0/1]port trunk allow-pass vlan 12 [LSW2-GigabitEthernet0/0/4]port link-type trunk [LSW2-GigabitEthernet0/0/4]port trunk allow-pass vlan 24 [LSW3]vlan batch 13 34 [LSW3-GigabitEthernet0/0/1]port link-type trunk [LSW3-GigabitEthernet0/0/1]port trunk allow-pass vlan 13 [LSW3-GigabitEthernet0/0/4]port link-type trunk [LSW3-GigabitEthernet0/0/4]port trunk allow-pass vlan 34 [LSW4]vlan batch 24 34 45 [LSW4-GigabitEthernet0/0/2]port link-type trunk [LSW4-GigabitEthernet0/0/2]port trunk allow-pass vlan 24 [LSW4-GigabitEthernet0/0/3]port link-type trunk [LSW4-GigabitEthernet0/0/3]port trunk allow-pass vlan 34 [LSW4-GigabitEthernet0/0/1]port link-type trunk [LSW4-GigabitEthernet0/0/1]port trunk allow-pass vlan 45 [LSW5]vlan batch 10 45 [LSW5-GigabitEthernet0/0/1]port link-type trunk [LSW5-GigabitEthernet0/0/1]port trunk allow-pass vlan 45 [LSW5-GigabitEthernet0/0/2]port link-type trunk [LSW5-GigabitEthernet0/0/2]port trunk allow-pass vlan 10 - 配置各接口的IP地址
[LSW1-Vlanif12]ip add 10.1.12.1 24 [LSW1-Vlanif13]ip add 10.1.13.1 24 [LSW1]int LoopBack 0 [LSW1-LoopBack0]ip add 10.1.1.1 32 [LSW2-Vlanif12]ip add 10.1.12.2 24 [LSW2-Vlanif24]ip add 10.1.24.2 24 [LSW2]int LoopBack 0 [LSW2-LoopBack0]ip add 10.2.2.2 32 [LSW3-Vlanif13]ip add 10.1.13.3 24 [LSW3-Vlanif34]ip add 10.1.34.3 24 [LSW3]int LoopBack 0 [LSW3-LoopBack0]ip add 10.3.3.3 32 [LSW4-Vlanif24]ip add 10.1.24.4 24 [LSW4-Vlanif34]ip add 10.1.34.4 24 [LSW4-Vlanif45]ip add 10.1.45.4 24 [LSW4]int LoopBack 0 [LSW4-LoopBack0]ip add 10.4.4.4 32 [LSW5-Vlanif45]ip add 10.1.45.5 24 [LSW5-Vlanif10]ip add 10.2.10.5 24 [LSW5]int LoopBack 0 [LSW5-LoopBack0]ip add 10.5.5.5 32 - 配置OSPF的基本功能
[LSW1]ospf 1 router-id 10.1.1.1 [LSW1-ospf-1]area 0 [LSW1-ospf-1-area-0.0.0.0]network 10.1.12.0 0.0.0.255 [LSW1-ospf-1-area-0.0.0.0]network 10.1.13.0 0.0.0.255 [LSW1-ospf-1-area-0.0.0.0]network 10.1.1.1 0.0.0.0 [LSW2]ospf 1 router-id 10.2.2.2 [LSW2-ospf-1]area 0 [LSW2-ospf-1-area-0.0.0.0]network 10.1.12.0 0.0.0.255 [LSW2-ospf-1-area-0.0.0.0]network 10.1.24.0 0.0.0.255 [LSW2-ospf-1-area-0.0.0.0]network 10.2.2.2 0.0.0.0 [LSW3]ospf 1 router-id 10.3.3.3 [LSW3-ospf-1]area 0 [LSW3-ospf-1-area-0.0.0.0]network 10.1.13.0 0.0.0.255 [LSW3-ospf-1-area-0.0.0.0]network 10.1.34.0 0.0.0.255 [LSW3-ospf-1-area-0.0.0.0]network 10.3.3.3 0.0.0.0 [LSW4]ospf 1 router-id 10.4.4.4 [LSW4-ospf-1]area 0 [LSW4-ospf-1-area-0.0.0.0]network 10.1.34.0 0.0.0.255 [LSW4-ospf-1-area-0.0.0.0]network 10.1.24.0 0.0.0.255 [LSW4-ospf-1-area-0.0.0.0]network 10.4.4.4 0.0.0.0 - 配置IBGP全连接
[LSW1]bgp 10 [LSW1-bgp]peer 10.2.2.2 as-number 10 [LSW1-bgp]peer 10.2.2.2 connect-interface LoopBack 0 [LSW1-bgp]peer 10.3.3.3 as-number 10 [LSW1-bgp]peer 10.3.3.3 connect-interface LoopBack 0 [LSW1-bgp]peer 10.4.4.4 as-number 10 [LSW1-bgp]peer 10.4.4.4 connect-interface LoopBack 0 [LSW2]bgp 10 [LSW2-bgp]peer 10.1.1.1 as-number 10 [LSW2-bgp]peer 10.1.1.1 connect-interface LoopBack 0 [LSW2-bgp]peer 10.3.3.3 as-number 10 [LSW2-bgp]peer 10.3.3.3 connect-interface LoopBack 0 [LSW2-bgp]peer 10.4.4.4 as-number 10 [LSW2-bgp]peer 10.4.4.4 connect-interface LoopBack 0 [LSW3]bgp 10 [LSW3-bgp]peer 10.1.1.1 as-number 10 [LSW3-bgp]peer 10.1.1.1 connect-interface LoopBack 0 [LSW3-bgp]peer 10.2.2.2 as-number 10 [LSW3-bgp]peer 10.2.2.2 connect-interface LoopBack 0 [LSW3-bgp]peer 10.4.4.4 as-number 10 [LSW3-bgp]peer 10.4.4.4 connect-interface LoopBack 0 [LSW4]bgp 10 [LSW4-bgp]peer 10.1.1.1 as-number 10 [LSW4-bgp]peer 10.1.1.1 connect-interface LoopBack 0 [LSW4-bgp]peer 10.2.2.2 as-number 10 [LSW4-bgp]peer 10.2.2.2 connect-interface LoopBack 0 [LSW4-bgp]peer 10.3.3.3 as-number 10 [LSW4-bgp]peer 10.3.3.3 connect-interface LoopBack 0 - 配置EBGP连接
[LSW4]bgp 10 [LSW4-bgp]peer 10.1.45.5 as-number 20 [LSW4-bgp]import-route direct [LSW4-bgp]import-route ospf 1 [LSW5]bgp 20 [LSW5-bgp]router-id 10.5.5.5 [LSW5-bgp]peer 10.1.45.4 as-number 10 [LSW5-bgp]ipv4-family unicast [LSW5-bgp-af-ipv4]network 10.2.10.0 24 - 配置LSW2上OSPF协议的开销值
[LSW2]int Vlanif 12 [LSW2-Vlanif12]ospf cost 2 [LSW2]int Vlanif 24 [LSW2-Vlanif24]ospf cost 2  
从路由表中可以看出,LSW3通过BGP协议可以学习到目标网段10.2.10.0的路由,出接口是Vlanif34;通过OSPF协议可以学习到目标网段10.1.12.0和10.1.24.0的路由,路由开销都是2 7. 在LSW3上配置OSPF-BGP联动功能 [LSW3]ospf 1 [LSW3-ospf-1]stub-router on-startup 8. 查看配置:保存、重启LSW3 
可以看出,通过BGP协议可以学习到目标网段10.2.10.0的路由,出接口变为Vlanif12
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