linux下配置VLAN
一些知识点
| 交换机端口模式 | 用途 |
|---|---|
| access | 用于连接计算机端.接收到不带vlan tag的包则打native id，然后转发；发送时则剥离掉vlan tag |
| trunk | 用于交换机之间的互联。接收包时，若包有vlan tag则判断是否允许该vlan id进入，进而转发或丢弃；没有vlan tag的包则打native vlan id然后交换转发 |
| hybird | 混合了上面两种模式。接受时同trunk，发送时判断端口属性，untag则剥离tag，如果是tag则直接发送 |
linux下vlan配置
1. 查看内核是否支持vlan功能(内核模块为8021q)
root@l-all-3:~# modinfo 8021q
filename: /lib/modules/3.13.0-24-generic/kernel/net/8021q/8021q.ko
version: 1.8
license: GPL
alias: rtnl-link-vlan
srcversion: EF43AFFE12EA6E25FAC0538
depends: mrp,garp
intree: Y
vermagic: 3.13.0-24-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 00:A5:A6:57:59:DE:47:4B:C5:C4:31:20:88:0C:1B:94:A5:39:F4:31
sig_hashalgo: sha512
让系统开机默认加载8201q模块
# echo "modprobe 8021q" > /etc/rc.local
# echo "8021q" >> /etc/modules
查看vlan配置
root@l-all-3:~# cat /proc/net/vlan/config
VLAN Dev name | VLAN ID
Name-Type: VLAN_NAME_TYPE_PLUS_VID_NO_PAD
vlan1000 | 1000 | eth4
方法一:通过vlan命令配置
# apt-get install vlan
# modprobe 8021q
# vconfig add eth0 100
# vconfig add eth0 200
然后对vlan100和vlan200配置ip就可以了.
删除
# vconfig rem vlan100
# vconfig rem vlan200
方法二:修改配置文件方式
root@l-all-1:~# cat /etc/network/interfaces
...
auto vlan1000
iface vlan1000 inet static
address 192.168.1.20
netmask 255.255.255.0
vlan-raw_device eth4
...
root@l-all-1:~# ifup vlan1000