spanning-tree mode mst
spanning-tree portfast default
spanning-tree portfast bpduguard default
spanning-tree extend system-id
!
spanning-tree mst configuration
name JNTYT
instance 1 100-101, 103-104, 108, 110, 161
instance 2 vlan 102, 109, 120-121
!
spanning-tree mst 0-1 priority 8192
spanning-tree mst 2 priority 16384 // 另外台交换机与之相反
在接入层交换机也需要配置 (蓝色部分即可)
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