[S9306-GigabitEthernet2/0/42]dis this
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interface GigabitEthernet2/0/42  原先的为trunk，
port link-type trunk
port trunk allow-pass vlan 2 to 4094
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interface GigabitEthernet2/0/42 现在改为access
undo port trunk  allow-pass vlan  all
port trunk allow-pass vlan 1
port link-type access
port  default vlan 10