................................
interface Ethernet1/0/1
port access vlan 1
loopback-detection enable
#
interface Ethernet1/0/2
port access vlan 2
loopback-detection enable
#
interface Ethernet1/0/3
port access vlan 3
loopback-detection enable
.............................................
interface Ethernet1/0/48
port link-type trunk
port trunk permit vlan 1 to XX */* VLAN 范围
loopback-detection enable
........................................
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