1. 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
2. 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
3. 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
4. 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
5. 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
6. 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
