如下图，按要求配置各个区域。防止出现环路。

配置文件：

SW1：SW2和3与SW1类似。

dis current-configuration

#

sysname SW1

#

vlan batch 2 to 20

#

stp instance 0 root primary

stp instance 1 root primary

stp instance 2 root secondary

#

stp region-configuration

region-name HCNA

revision-level 1

instance 1 vlan 1 to 10

instance 2 vlan 11 to 20

active region-configuration

#

interface GigabitEthernet0/0/1

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

interface GigabitEthernet0/0/2

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

SW4：SW5和6配置和SW4配置类似：

dis current-configuration

#

sysname SW4

#

vlan batch 2 to 20

#

stp instance 1 root primary

stp instance 2 root secondary

#

stp region-configuration

region-name HCNP

revision-level 2

instance 1 vlan 1 to 10

instance 2 vlan 11 to 20

active region-configuration

#

interface GigabitEthernet0/0/1

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

interface GigabitEthernet0/0/2

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

interface GigabitEthernet0/0/3

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

SW7：8,9的配置和7的配置类似：

[SW7]dis current-configuration

#

sysname SW7

#

vlan batch 2 to 20

#

stp instance 1 root primary

stp instance 2 root secondary

#

stp region-configuration

region-name HCIE

instance 1 vlan 1 to 10

instance 2 vlan 11 to 20

active region-configuration

#

interface GigabitEthernet0/0/1

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

interface GigabitEthernet0/0/2

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

interface GigabitEthernet0/0/3

port link-type trunk

port trunk allow-pass vlan 2 to 20

#

查看MSTP状态：