HCNA-MSTP

1.首先在交换机S1、S2、S3上配置vlan，并将相应端口加入vlan中，以S2交换机为例

[S2]vlan batch 10 20

[S2]int e0/0/2

[S2-Ethernet0/0/2]port link-type access

[S2-Ethernet0/0/2]port default vlan 20

[S2-Ethernet0/0/2]int e0/0/1

[S2-Ethernet0/0/1]port link-t tr

[S2-Ethernet0/0/1]port tr all vlan al

[S2-Ethernet0/0/1]int e0/0/3

[S2-Ethernet0/0/3]port link-t tru

[S2-Ethernet0/0/3]port trunk allow-pass vlan all

2.配置MSTP多实例

[S1]stp region-configuration

[S1-mst-region]region-name huawei

[S1-mst-region]revision-level 1

[S1-mst-region]instance 1 vlan 10

[S1-mst-region]instance 2 vlan 20

[S1-mst-region]active region-configuration

[S2]stp region-configuration

[S2-mst-region]region-name huawei

[S2-mst-region]revision-level 1

[S2-mst-region]instance 1 vlan 10

[S2-mst-region]instance 2 vlan 20

[S2-mst-region]active region-configuration

[S3]stp region-configuration

[S3-mst-region]region-name huawei

[S3-mst-region]revision-level 1

[S3-mst-region]instance 1 vlan 10

[S3-mst-region]instance 2 vlan 20

[S3-mst-region]active region-configuration

3.配置完成后还需将S2交换机配置为实例2中的跟交换机

[S2]stp instance 2 priority 0

配置完成！