首先需确保加载了内核模块 802.1q

[root@development ~]# lsmod | grep 8021q
[root@development ~]# modprobe 8021q		
		

加载后会生成目录/proc/net/vlan

[root@development ~]# cat /proc/net/vlan/config
VLAN Dev name    | VLAN ID
Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD