全网所有交换机都要配置如下命令，包括接入，汇聚交换机：
stp region-configuration
region-name Huawei
revision-level 12
instance 10 vlan 10
instance 20 vlan 20
active region-configuration
所有交换机互连端口都要配置trunk
port-group group-member g0/0/1 g0/0/2 eth-trunk 12
port link-type trunk
port trunk allow vlan all
undo port trunk allow vlan 1
接入PC设置为边缘端口：
stp edge enable
port link-type access
port default vlan 10
配置聚合口：
int eth-trunk 12
[SW2-Eth-Trunk12] trunkport GigabitEthernet 0/0/4 to 0/0/5
[SW2-Eth-Trunk12] load-balance src-dst-mac
配置主备根桥负载分担：
[SW2]stp instance 20 root primary
[SW2]stp instance 10 root secondary
所有交换机创建VLAN 10 20
vlan batch 10 20
标签：10,vlan,20,配置,MSTP,instance,trunk,port From： https://www.cnblogs.com/linux-china/p/17029685.html