拓扑图：

在SW1、SW2上配置vrrp

sw1：

#vlan batch 10 20 30 40

int vlan 10

ip add 192.168.10.253 24

vrrp vrid 10 virtual-ip 192.168.10.254

vrrp vrid 10 priority 120

vrrp vrid 10 preempt-mode timer delay 10

vrrp vrid 10 track interface GigabitEthernet0/0/1 reduced 30

int vlan 20

ip add 192.168.20.252 24

vrrp vrid 20 virtual-ip 192.168.20.254

int vlan 30

ip add 192.168.30.253 24

vrrp vrid 30 virtual-ip 192.168.30.254

vrrp vrid 30 priority 120

vrrp vrid 30 preempt-mode timer delay 10

vrrp vrid 30 track interface GigabitEthernet0/0/1 reduced 30

int vlan 40

ip add 192.168.40.252 24

vrrp vrid 40 virtual-ip 192.168.40.254

sw1：

#vlan batch 10 20 30 40

int vlan 10

ip add 192.168.10.252 24

vrrp vrid 10 virtual-ip 192.168.10.254

int vlan 20

ip add 192.168.20.253 24

vrrp vrid 20 virtual-ip 192.168.20.254

vrrp vrid 20 priority 120

vrrp vrid 20 preempt-mode timer delay 10

vrrp vrid 20 track interface GigabitEthernet0/0/1 reduced 30

int vlan 30

ip add 192.168.30.252 24

vrrp vrid 30 virtual-ip 192.168.30.254

int vlan 40

ip add 192.168.40.253 24

vrrp vrid 40 virtual-ip 192.168.40.254

vrrp vrid 40 priority 120

vrrp vrid 40 preempt-mode timer delay 10

vrrp vrid 40 track interface GigabitEthernet0/0/1 reduced 30

sw1、sw2：

dis vrrp brief     //检查配置信息

 

在SW1、SW2和SW3上配置MSTP

要求：

1、sw1作为vlan10、30的主根；vlan20、40的备根

2、sw2作为vlan20、40的主根；vlan10、30的备根

实际配置：

sw1、sw2、sw3:

#stp region-configuration

region-name HUAWEI

revision-level 1

instance 1 vlan 10 30

instance 2 vlan 20 40

sw1:

#stp instance 1 root primary

stp instance 2 root secondary

sw2:

#stp instance 2 root primary

stp instance 1 root secondary

sw1、sw2、sw3：

dis stp brief         //检查配置信息