通用：

直接清除此接口的配置，重新设置

clear con int g0/0/1

=========================================================================

trunk改access

[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]undo port trunk allow-pass vlan all
[Huawei-GigabitEthernet0/0/1]port trunk allow-pass vlan 1
[Huawei-GigabitEthernet0/0/1]port link-type access

=========================================================================

access 改 trunk

[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]port default vlan 1
[Huawei-GigabitEthernet0/0/1]port link-type trunk
[Huawei-GigabitEthernet0/0/1]port trunk allow-pass vlan all

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华为交换机：trunk 改 access 和 access 改 trunk