- 安装vconfig
apt-get install vconfig - 运行802.1q模块
modprobe 8021q - 新建接口vlan
vconfig add eth2 3021 - 配置子接口
ifconfig eth2.3021 18.5.82.53 netmask 255.255.255.0 - 查看接口ifconfig
eth2.3021 Link encap:Ethernet HWaddr 00:0b?f3:36:78
inet addr:18.5.82.53 Bcast:18.5.82.255 Mask:255.255.255.0
inet6 addr: fe80::20b:abff:fef3:3678/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:5440 (5.4 KB) - 子接口down
ifconfig eth2.3020 down - 接口down后ifconfig查不到子接口，ip add可以看到
10: eth2.3020@eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether 00:0b?f3:36:78 brd ff:ff:ff:ff:ff:ff - 彻底删除子接口
ip link delete eth2.3020
这都是临时生效，重启后失效，要永久生效需要修改配置文件
/etc/network/interfaces
linux新建/删除子接口
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转载自blog.csdn.net/ly_6118/article/details/96838237
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