问题：
[多选题]17.要确保交换机成为VLAN 30的根网桥，可使用下面哪两个命令之一?
A.spanning-tree vlan 30 priority 0
B.spanning-tree vlan 30 priority 16384
C.spanning-tree vlan 30 root guarantee
D.spanning-tree vlan 30 root primary
Tags：计算机Cisco(思科)认证模拟试卷
答案解析：
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