场景主要用于：
设置两个vlan，每个vlan内的所有用户自动获取地址和能上外网，但是自个valn间用户都不能互相访问，每个用户又都可以 和其它vlan的用户通信。
官方版：
操作步骤
1.配置MUX VLAN
创建VLAN2、VLAN3和VLAN4。
system-view
[HUAWEI] sysname Switch
[Switch] vlan batch 2 3 4
配置MUX VLAN中的Group VLAN和Separate VLAN。
[Switch] vlan 2
[Switch-vlan2] mux-vlan
[Switch-vlan2] subordinate group 3
[Switch-vlan2] subordinate separate 4
[Switch-vlan2] quit
配置接口加入VLAN并使能MUX VLAN功能。
[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port link-type access
[Switch-GigabitEthernet0/0/1] port default vlan 2
[Switch-GigabitEthernet0/0/1] port mux-vlan enable vlan 2
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] port link-type access
[Switch-GigabitEthernet0/0/2] port default vlan 3
[Switch-GigabitEthernet0/0/2] port mux-vlan enable vlan 3
[Switch-GigabitEthernet0/0/2] quit
[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] port link-type access
[Switch-GigabitEthernet0/0/3] port default vlan 3
[Switch-GigabitEthernet0/0/3] port mux-vlan enable vlan 3
[Switch-GigabitEthernet0/0/3] quit
[Switch] interface gigabitethernet 0/0/4
[Switch-GigabitEthernet0/0/4] port link-type access
[Switch-GigabitEthernet0/0/4] port default vlan 4
[Switch-GigabitEthernet0/0/4] port mux-vlan enable vlan 4
[Switch-GigabitEthernet0/0/4] quit
[Switch] interface gigabitethernet 0/0/5
[Switch-GigabitEthernet0/0/5] port link-type access
[Switch-GigabitEthernet0/0/5] port default vlan 4
[Switch-GigabitEthernet0/0/5] port mux-vlan enable vlan 4
[Switch-GigabitEthernet0/0/5] quit
检查配置结果
Server和HostB、HostC、HostD、HostE在同一网段。
Server和HostB、HostC、HostD、HostE二层流量互通。
HostB和HostC二层流量互通。
HostD和HostE二层流量不通。
HostB、HostC和HostD、HostE二层流量不通。
配置MUX VLAN
在Switch1上创建VLAN2、VLAN3和VLAN4，并配置VLAN2的VLANIF接口，其IP地址可以作为下挂Host及Server的网关IP。
system-view
[HUAWEI] sysname Switch1
[Switch1] vlan batch 2 3 4
[Switch1] interface vlanif 2
[Switch1-Vlanif2] ip address 192.168.100.100 24
[Switch1-Vlanif2] quit
在Switch1上配置MUX VLAN中的Group VLAN和Separate VLAN。
[Switch1] vlan 2
[Switch1-vlan2] mux-vlan
[Switch1-vlan2] subordinate group 3
[Switch1-vlan2] subordinate separate 4
[Switch1-vlan2] quit
在Switch1上配置接口加入VLAN并使能MUX VLAN功能。
[Switch1] interface gigabitethernet 0/0/2
[Switch1-GigabitEthernet0/0/2] port link-type trunk
[Switch1-GigabitEthernet0/0/2] port trunk allow-pass vlan 2
[Switch1-GigabitEthernet0/0/2] port mux-vlan enable vlan 2
[Switch1-GigabitEthernet0/0/2] quit
[Switch1] interface gigabitethernet 0/0/3
[Switch1-GigabitEthernet0/0/3] port link-type trunk
[Switch1-GigabitEthernet0/0/3] port trunk allow-pass vlan 3
[Switch1-GigabitEthernet0/0/3] port mux-vlan enable vlan 3
[Switch1-GigabitEthernet0/0/3] quit
[Switch1] interface gigabitethernet 0/0/4
[Switch1-GigabitEthernet0/0/4] port link-type trunk
[Switch1-GigabitEthernet0/0/4] port trunk allow-pass vlan 3
[Switch1-GigabitEthernet0/0/4] port mux-vlan enable vlan 3
[Switch1-GigabitEthernet0/0/4] quit
[Switch1] interface gigabitethernet 0/0/5
[Switch1-GigabitEthernet0/0/5] port link-type trunk
[Switch1-GigabitEthernet0/0/5] port trunk allow-pass vlan 4
[Switch1-GigabitEthernet0/0/5] port mux-vlan enable vlan 4
[Switch1-GigabitEthernet0/0/5] quit
[Switch1] interface gigabitethernet 0/0/6
[Switch1-GigabitEthernet0/0/6] port link-type trunk
[Switch1-GigabitEthernet0/0/6] port trunk allow-pass vlan 4
[Switch1-GigabitEthernet0/0/6] port mux-vlan enable vlan 4
[Switch1-GigabitEthernet0/0/6] quit
2.配置接入层交换机的接口加入相应VLAN，略。
3.检查配置结果
Server和HostB、HostC、HostD、HostE二层流量互通。
HostB和HostC二层流量互通。
HostD和HostE二层流量不通。
HostB、HostC和HostD、HostE二层流量不通。