为何链路类型设置成trunk口，允许所有vlan通过通信不了。设置不允许vlan 1通过就能通信了？求指点

[huaiwei G0/0/1]dis this
#
port link type trunk
port trunk allow-pass vlan all
设置成这样通信不了

[huaiwei G0/0/1]dis this
#
port link type trunk
undo port trunk allow-pass vlan 1
设置成这样就能通信了