#　MSTP

![image-20240821193420313](https://picgo-noriu.oss-cn-beijing.aliyuncs.com/Images/image-20240821193420313.png)

### 一、配置

- **SW1**

  ```
  <Huawei>u t m
  <Huawei>sy
  [Huawei]sy SW1
  [SW1]vlan batch 10 20
  [SW1]port-group 1
  [SW1-port-group-1]group-member g0/0/1 g0/0/2
  [SW1-port-group-1]port link-type trunk 
  [SW1-port-group-1]port trunk allow-pass vlan 10 20
  [SW1-port-group-1]quit
  [SW1]stp mode mstp
  [SW1]stp region-configuration 
  [SW1-mst-region]region-name ntd
  [SW1-mst-region]instance 1 vlan 10
  [SW1-mst-region]instance 2 vlan 20	
  [SW1-mst-region]active region-configuration 	
  [SW1]stp instance 1 priority 4096
  [SW1]quit
  <SW1>save
  ```

- **SW2**

  ```
  <Huawei>u t m
  <Huawei>sy
  [Huawei]sy SW2
  [SW2]vlan batch 10 20
  [SW2]port-group 1
  [SW2-port-group-1]group-member g0/0/1 g0/0/2
  [SW2-port-group-1]port link-type trunk 
  [SW1-port-group-1]port trunk allow-pass vlan 10 20
  [SW2-port-group-1]quit
  [SW2]stp mode mstp
  [SW2]stp region-configuration 
  [SW2-mst-region]region-name ntd  
  [SW2-mst-region]instance 1 vlan 10  
  [SW2-mst-region]instance 2 vlan 20 
  [SW2-mst-region]active region-configuration 
  [SW2-mst-region]quit
  [SW2]stp instance 2 priority 4096
  [SW2]quit
  <SW2>save
  ```

- **SW3**

  ```
  <Huawei>u t m
  <Huawei>sy
  [Huawei]sy SW3
  [SW3]vlan batch 10 20
  [SW3]int g0/0/1 
  [SW3-GigabitEthernet0/0/1]port link-type access 
  [SW3-GigabitEthernet0/0/1]port default vlan 10
  [SW3-GigabitEthernet0/0/1]int g0/0/2
  [SW3-GigabitEthernet0/0/2]port link-type access 
  [SW3-GigabitEthernet0/0/2]port default vlan 20
  [SW3-GigabitEthernet0/0/2]quit
  [SW3]port-group 1
  [SW3-port-group-1]group-member g0/0/3 g0/0/4
  [SW3-port-group-1]port link-type trunk 
  [SW3-port-group-1]port trunk allow-pass vlan 10 20
  [SW3-port-group-1]quit
  [SW3]stp mode mstp
  [SW3]stp region-configuration 
  [SW3-mst-region]region-name ntd
  [SW3-mst-region]instance 1 vlan 10   
  [SW3-mst-region]instance 2 vlan 20
  [SW3-mst-region]active region-configuration 
  [SW3-mst-region]quit
  [SW3]quit
  <SW3>save
  ```


### 二、测试

- **SW1**

  ```
  <SW1>dis stp ins 1 b
   MSTID  Port                        Role  STP State     Protection
     1    GigabitEthernet0/0/1        DESI  FORWARDING      NONE
     1    GigabitEthernet0/0/2        DESI  FORWARDING      NONE
  <SW1>dis stp ins 2 b
   MSTID  Port                        Role  STP State     Protection
     2    GigabitEthernet0/0/1        ALTE  DISCARDING      NONE
     2    GigabitEthernet0/0/2        ROOT  FORWARDING      NONE
  ```

- **SW2**

  ```
  <SW2>dis stp ins 1 b
   MSTID  Port                        Role  STP State     Protection
     1    GigabitEthernet0/0/1        ALTE  DISCARDING      NONE
     1    GigabitEthernet0/0/2        ROOT  FORWARDING      NONE
  <SW2>dis stp ins 2 b
   MSTID  Port                        Role  STP State     Protection
     2    GigabitEthernet0/0/1        DESI  FORWARDING      NONE
     2    GigabitEthernet0/0/2        DESI  FORWARDING      NONE
  ```

- **SW3**

  ```
  <SW3>dis stp ins 1 b
   MSTID  Port                        Role  STP State     Protection
     1    GigabitEthernet0/0/1        DESI  FORWARDING      NONE
     1    GigabitEthernet0/0/3        ROOT  FORWARDING      NONE
     1    GigabitEthernet0/0/4        DESI  FORWARDING      NONE
  <SW3>dis stp ins 2 b
   MSTID  Port                        Role  STP State     Protection
     2    GigabitEthernet0/0/2        DESI  FORWARDING      NONE
     2    GigabitEthernet0/0/3        DESI  FORWARDING      NONE
     2    GigabitEthernet0/0/4        ROOT  FORWARDING      NONE
  ```