双机热备旁挂组网方案

拓扑图

需求

1、SW3的流量
    正常时：SW1_VRF--->FW1--->SW1_Public--->R5
    故障时：SW2_VRF--->FW2--->SW2_Public--->R6
2、SW4的流量
    正常时：SW2_VRF--->FW2--->SW2_Public--->R6
    故障时：SW1_VRF--->FW1--->SW1_Public--->R5
3、交换网络实现负载分担

配置
交换网络配置

LSW3：

[LSW3]vlan batch 2 3
[LSW3]interface GigabitEthernet 0/0/3   
[LSW3-GigabitEthernet0/0/3]port link-type trunk 
[LSW3-GigabitEthernet0/0/3]port trunk allow-pass vlan 2 3
[LSW3]interface g 0/0/4
[LSW3-GigabitEthernet0/0/4]port link-type trunk 
[LSW3-GigabitEthernet0/0/4]port trunk allow-pass vlan 2 3

[LSW3]stp enable 
[LSW3]stp mode mstp 
[LSW3]stp region-configuration 
[LSW3-mst-region]region-name haihai
[LSW3-mst-region]instance 1 vlan 2
[LSW3-mst-region]instance 2 vlan 3
[LSW3-mst-region]active region-configuration 
[LSW3]stp instance 1 root primary   
[LSW3]stp instance 2 root secondary 
[LSW3]stp instance  0 root primary 

[LSW3]interface Vlanif 2
[LSW3-Vlanif2]ip address 192.168.2.1 24
[LSW3-Vlanif2]vrrp vrid 1 virtual-ip 192.168.2.254
[LSW3-Vlanif2]vrrp vrid 1 priority 120 
[LSW3-Vlanif2]vrrp vrid 1 preempt-mode timer delay 20
[LSW3-Vlanif2]vrrp vrid 1 track interface GigabitEthernet 0/0/1 reduced 15
[LSW3-Vlanif2]vrrp vrid 1 track interface GigabitEthernet 0/0/2 reduced 15
 

[LSW3]interface Vlanif 3
[LSW3-Vlanif3]ip add 192.168.3.1 24
[LSW3-Vlanif3]vrrp vrid 1 virtual-ip 192.168.3.254

LSW4:

[LSW4]vlan batch 2 3
[LSW4]interface GigabitEthernet 0/0/3
[LSW4-GigabitEthernet0/0/3] port link-type trunk
[LSW4-GigabitEthernet0/0/3]port trunk allow-pass vlan 2 3
[LSW4]interface GigabitEthernet 0/0/4
[LSW4-GigabitEthernet0/0/4] port link-type trunk
[LSW4-GigabitEthernet0/0/4] port trunk allow-pass vlan 2 3

[LSW4]stp enable 
[LSW4]stp mode mstp
[LSW4]stp region-configuration 
[LSW4-mst-region]region-name haihai
[LSW4-mst-region]instance 1 vlan 2
[LSW4-mst-region]instance 2 vlan 3
[LSW4-mst-region]active region-configuration 
[LSW4]stp instance 1 root secondary 
[LSW4]stp instance 2 root primary
[LSW4]stp instance 0 root secondary

[LSW4]interface Vlanif 2
[LSW4-Vlanif2]ip add 192.168.2.2 24
[LSW4-Vlanif2]vrrp vrid 1 virtual-ip 192.168.2.254

[LSW4]interface Vlanif3
[LSW4-Vlanif3]ip address 192.168.3.2 255.255.255.0
[LSW4-Vlanif3]vrrp vrid 1 virtual-ip 192.168.3.254
[LSW4-Vlanif3]vrrp vrid 1 priority 120
[LSW4-Vlanif3]vrrp vrid 1 preempt-mode timer delay 20
[LSW4-Vlanif3] vrrp vrid 1 track interface GigabitEthernet0/0/1 reduced 15
[LSW4-Vlanif3]vrrp vrid 1 track interface GigabitEthernet0/0/2 reduced 15

LSW5：

[LSW5]vlan batch 2 3
[LSW5]interface GigabitEthernet 0/0/3
[LSW5-GigabitEthernet0/0/3]port link-type access 
[LSW5-GigabitEthernet0/0/3]port default vlan 2
[LSW5]interface GigabitEthernet 0/0/4
[LSW5-GigabitEthernet0/0/4]port link-type access     
[LSW5-GigabitEthernet0/0/4]port default vlan 3
[LSW5]interface GigabitEthernet 0/0/1
[LSW5-GigabitEthernet0/0/1]port link-type trunk 
[LSW5-GigabitEthernet0/0/1]port trunk allow-pass vlan 2 3
[LSW5]interface GigabitEthernet 0/0/2
[LSW5-GigabitEthernet0/0/2]port link-type trunk
[LSW5-GigabitEthernet0/0/2]port trunk allow-pass vlan 2 3

[LSW5]stp enable 
[LSW5]stp mode mstp
[LSW5]stp region-configuration 
[LSW5-mst-region]region-name haihai
[LSW5-mst-region]instance 1 vlan 2
[LSW5-mst-region]instance 2 vlan 3
[LSW5-mst-region]active region-configuration

交换网络测试：

查看stp生成树：

汇聚层配置

LSW3:

[LSW3]vlan