linux 网桥反对 vlan filtering 过滤性能后，咱们不仔再须要通过子接口的模式进行 vlan 划分，简化了 vlan 配置。
1. bridge vlan 阐明
man bridge 能够理解到，linux 通过如下命令进行 vlan filtering 的配置：
bridge vlan {add | del} dev DEV vid VID [pvid] [untagged] [self] [master]选项阐明：
pvid：端口的默认 vlan，所有从该端口输出的没有携带 vlan 的报文，会被打上该 vlan 标签，该选项只对输出报文无效。
untagged：端口的 untag vlan，输入报文携带该 vlan 时，会被剥离。
个别状况下 pvid 和 untagged 是同时应用的，对应于 cisco 的 switchport trunk native vlan
self
master
这两个选项在帮忙手册上是这么解释的：
self the vlan is configured on the specified physical device. Required if the device is the bridge device.
master the vlan is configured on the software bridge (default).我的了解是：self 示意该 vlan 是增加再 bridge 设施上的，而且给桥增加 vlan 时必须且只能携带该选项，否则会报错：
ubuntu@VM-126-137-ubuntu:~$ sudo ip link add Bridge up type bridge vlan_filtering 1
ubuntu@VM-126-137-ubuntu:~/bgp-lab$ sudo bridge vlan add vid 100 dev Bridge self
ubuntu@VM-126-137-ubuntu:~/bgp-lab$
ubuntu@VM-126-137-ubuntu:~/$ sudo bridge vlan add vid 100 dev Bridge master
RTNETLINK answers: Operation not supported
ubuntu@VM-126-137-ubuntu:~/$ sudo bridge vlan add vid 100 dev Bridge
RTNETLINK answers: Operation not supported
ubuntu@VM-126-137-ubuntu:~/$ master 示意该 vlan 是增加再 bridge 的端口设施上的，该选项是默认的，给桥上的端口增加 vlan 时能够不指定该参数。
ubuntu@ubuntu:~/$ sudo ip link del Bridge
ubuntu@ubuntu:~/$ sudo ip link add Bridge up type bridge vlan_filtering 1
ubuntu@ubuntu:~/$ sudo ip link set eth1 master Bridge
ubuntu@ubuntu:~/$ sudo bridge vlan add vid 100 dev Bridge self
ubuntu@ubuntu:~/$ sudo bridge vlan add vid 100 dev eth1
ubuntu@ubuntu:~/$ sudo bridge vlan add vid 100 dev eth1 master
ubuntu@ubuntu:~/$
ubuntu@ubuntu:~/$ sudo bridge vlan add vid 100 dev eth1 self
RTNETLINK answers: Operation not supported
ubuntu@ubuntu:~/$
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
eth1 1 PVID Egress Untagged
100
Bridge 1 PVID Egress Untagged
100
ubuntu@ubuntu:~/$ 增加桥时，默认会以 pvid untagged 模式增加的默认 vlan 1 中，很多厂商会把 vlan 1 作为保留 vlan，不容许用户配置。
ubuntu@ubuntu:~/$ sudo ip link del Bridge
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
ubuntu@ubuntu:~/$ sudo ip link add Bridge up type bridge vlan_filtering 1
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
Bridge 1 PVID Egress Untagged
ubuntu@ubuntu:~/$ 端口退出桥时，也会默认以 pvid untagged 模式增加的默认 vlan 1 中，
ubuntu@ubuntu:~/$ sudo ip link del Bridge
ubuntu@ubuntu:~/$ sudo ip link add Bridge up type bridge vlan_filtering 1
ubuntu@ubuntu:~/$ sudo ip link set eth1 master Bridge
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
eth1 1 PVID Egress Untagged
Bridge 1 PVID Egress Untagged
ubuntu@ubuntu:~/$ 也能够删除默认 vlan 1
ubuntu@ubuntu:~/$ sudo bridge vlan del vid 1 dev enp4s0f0 master
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
enp129s0f0np0
enp129s0f1np1
enp4s0f0 100
Bridge 1 PVID Egress Untagged
100
ubuntu@ubuntu:~/$ sudo bridge vlan del vid 1 dev Bridge self
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
enp4s0f0 100
Bridge 100
ubuntu@ubuntu:~/$ 2. 试验
2.1 ubuntu 配置
ubuntu@ubuntu:~/$ sudo ip link add Bridge up type bridge vlan_filtering 1
ubuntu@ubuntu:~/$ sudo ip link set eth1 master Bridge
ubuntu@ubuntu:~/$ sudo bridge vlan add vid 100 dev Bridge self
ubuntu@ubuntu:~/$ sudo bridge vlan add vid 100 dev eth1 master
ubuntu@ubuntu:~/$ sudo ip link add link Bridge name Vlan100 up type vlan id 100
ubuntu@ubuntu:~/$ sudo ip addr add 10.0.2.1/24 dev Vlan100
ubuntu@ubuntu:~/$ sudo bridge vlan show
port vlan ids
eth1 1 PVID Egress Untagged
100
Bridge 1 PVID Egress Untagged
100
ubuntu@ubuntu:~/$ 2.2 交换机配置
SWITCH# exit
SWITCH> enable
SWITCH# show vlan
+-----------+--------------+---------+----------------+-----------------------+
| VLAN ID | IP Address | Ports | Port Tagging | DHCP Helper Address |
+===========+==============+=========+================+=======================+
+-----------+--------------+---------+----------------+-----------------------+
SWITCH# configure terminal
SWITCH(config)# vlan 100
SWITCH(config)# interface eth25GE 47
SWITCH(config-if)# switchport mode
access trunk
SWITCH(config-if)# switchport mode trunk
SWITCH(config-if)# switchport trunk allowd vlan add 100
SWITCH(config-if)# exit
SWITCH(config)# interface vlan 100
SWITCH(config-if)# ip address 10.0.2.2/24
Add Vlan100 into default VRF
SWITCH(config-if)# 2.3 互 ping
SWITCH(config-if)# do ping 10.0.2.1
PING 10.0.2.1 (10.0.2.1) 56(84) bytes of data.
64 bytes from 10.0.2.1: icmp_seq=1 ttl=64 time=0.196 ms
64 bytes from 10.0.2.1: icmp_seq=2 ttl=64 time=0.219 ms
64 bytes from 10.0.2.1: icmp_seq=3 ttl=64 time=0.150 ms
^C
SWITCH(config-if)#
--- 10.0.2.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2032ms
rtt min/avg/max/mdev = 0.150/0.188/0.219/0.030 ms
SWITCH(config-if)#
ubuntu@ubuntu:~/$ ping 10.0.2.2
PING 10.0.2.2 (10.0.2.2) 56(84) bytes of data.
64 bytes from 10.0.2.2: icmp_seq=1 ttl=64 time=0.308 ms
64 bytes from 10.0.2.2: icmp_seq=2 ttl=64 time=0.245 ms
64 bytes from 10.0.2.2: icmp_seq=3 ttl=64 time=0.262 ms
^C
--- 10.0.2.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2031ms
rtt min/avg/max/mdev = 0.245/0.271/0.308/0.032 ms
ubuntu@ubuntu:~/$