trunk端口_TRUNK接口的工作过程

port default vlan 20interface GigabitEthernet0/0/3port link-type trunk修改为trunk模式port trunk pvid vlan 20PVID设置为20(也就是本征)port trunk allow-pass vlan 10 20允许vlan10 20 的数据帧经过LSW2interface GigabitEthernet0/0/1port link-type accessport default vlan 30interface GigabitEthernet0/0/2port link-type accessport default vlan 10interface GigabitEthernet0/0/3port link-type trunkport trunk pvid vlan 30port trunk allow-pass vlan 10 30PC1PC2

PC3PC4验证测试：PC1----PC4

PC2----PC3