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A.ruijie（config）#spanning-treecost 30
B.ruijie（config-if-fastethernet0/1）#spanning-tree cost 30
C.ruijie（config）#spanning-tree priority 30
D.ruijie（config-if-fastethernet0/1）#spanning-treepath-cost 30

A.ruijie（config）#spanning-tree priority 4094
B.ruijie（config）#spanning-tree priority 4096
C.ruijie（config-stp）#spanning-tree priority 4094
D.ruijie（config-stp）#spanning-tree priority 4096