查看trunk端口

[H3C1]display interface e0/4/3

部分显示省略

Port link-type: trunk

  VLAN passing  : 1(default vlan)             //默认只有vlan1通过

  VLAN permitted: 1(default vlan)             //默认只允许vlan1通过

  Trunk port encapsulation: IEEE 802.1q       //封装类型只会是IEEE802.1q