有3台Cisco 6500交换机SW1~ SW3, 其生成树优先级分别为0、16384和32768. 现要求将SW3作为根交换机, 下列对交换机优先级的配置,正确的是
A.
Switch-Sw1-6500>(enable)spanning-tree vlan 3 priority 12288Switch-SW3-6500>(enable)spanning tree vlan 3 priority 4096
B.
Switch-SW1-6500>(enable)set spantree priority 12288Switch-SW3-6500>(enable)set spantree priority 4096
C.
Switch-SW1-6500>(enable)set spantree priority 4096Switch-SW3-6500>(enable)sct spantree priority 40960
D.
Switch-SW1-6500>(enable)spantree priority 16384Switch-SW3-6500>(enable)spantree priority 16384