7.3 MSTP

3.MSTP多实例配置

1）SW1、SW2、SW3的基本配置

[SW1]vlan batch 2 to 20
[SW1]interface GigabitEthernet 0/0/1 
[SW1-GigabitEthernet0/0/1]port link-type trunk 
[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan all 
[SW1-GigabitEthernet0/0/1]quit
[SW1]interface GigabitEthernet 0/0/2
[SW1-GigabitEthernet0/0/2]port link-type trunk 
[SW1-GigabitEthernet0/0/2]port trunk allow-pass vlan all 

[SW2]vlan batch 2 to 20     
[SW2]interface GigabitEthernet 0/0/1
[SW2-GigabitEthernet0/0/1]port link-type trunk 
[SW2-GigabitEthernet0/0/1]port trunk allow-pass vlan all 
[SW2-GigabitEthernet0/0/1]quit
[SW2]interface GigabitEthernet 0/0/3
[SW2-GigabitEthernet0/0/3]port link-type trunk 
[SW2-GigabitEthernet0/0/3]port trunk allow-pass vlan all 

[SW3]vlan batch 2 to 20
[SW3]interface GigabitEthernet 0/0/2
[SW3-GigabitEthernet0/0/2]port link-type trunk 
[SW3-GigabitEthernet0/0/2]port trunk allow-pass vlan all 
[SW3]interface GigabitEthernet 0/0/3
[SW3-GigabitEthernet0/0/3]port link-type trunk 
[SW3-GigabitEthernet0/0/3]port trunk allow-pass vlan all 

2）SW1的MSTP配置

[SW1]stp region-configuration
[SW1-mst-region]region-name dsrw.com
[SW1-mst-region]instance 1 vlan 2 to 10
[SW1-mst-region]instance 2 vlan 11 to 20
[SW1-mst-region]active region-configuration 
[SW1]stp mode mstp 
[SW1]stp instance 0 root primary 
[SW1]stp instance 1 root primary 
[SW1]stp instance 2 root secondary 
[SW1]stp enable 

3）SW2的MSTP配置

[SW2]stp region-configuration
[SW2-mst-region]region-name dsrw.com
[SW2-mst-region]instance 1 vlan 2 to 10
[SW2-mst-region]instance 2 vlan 11 to 20
[SW2-mst-region]active region-configuration 
[SW2]stp mode mstp 
[SW2]stp instance 0 root secondary 
[SW2]stp instance 1 root secondary 
[SW2]stp instance 2 root primary 
[SW2]stp enable

4）SW3的MSTP配置

[SW3]stp region-configuration
[SW3-mst-region]region-name dsrw.com
[SW3-mst-region]instance 1 vlan 2 to 10
[SW3-mst-region]instance 2 vlan 11 to 20
[SW3-mst-region]active region-configuration 
[SW3]stp mode mstp 
[SW3]stp enable

5）查看MSTP配置

[SW3]display stp brief 
MSTID  Port                        Role  STP State     Protection
0    GigabitEthernet0/0/2        ROOT  FORWARDING      NONE
0    GigabitEthernet0/0/3        ALTE  DISCARDING      NONE
1    GigabitEthernet0/0/2        ROOT  FORWARDING      NONE
1    GigabitEthernet0/0/3        ALTE  DISCARDING      NONE
2    GigabitEthernet0/0/2        ALTE  DISCARDING      NONE
2    GigabitEthernet0/0/3        ROOT  FORWARDING      NONE

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