不同的VLAN之間相互通信必須要有三層設備（路由器，多層交換機）做中轉
VLAN間路由
通過三層設備路由，使得不同VLAN間可以相互通信。但僅僅允許單薄通信。不同VLAN之間廣播幀依然被隔離即沒有失去VLAN原來的意義
PC1(設置IP地址）
IP地址：192.168.10.1
子網掩碼：255.255.255.0
網關：192.168.10.254
PC2(設置IP地址）
IP地址：192.168.10.2
子網掩碼：255.255.255.0
網關：192.168.10.254
PC3(設置IP地址）
IP地址：192.168.20.1
子網掩碼：255.255.255.0
網關：192.168.20.254
PC4(設置IP地址）
IP地址：192.168.20.2
子網掩碼：255.255.255.0
網關：192.168.20.254
SW1（設置Trunk鏈路）
<Huawei>system-view //進入系統視圖
[Huawei]undo info-center enable //關閉信息告警提示
[Huawei]sysname SW1 //改名
[SW1]vlan batch 10 20 //創建vlan10和vlan20
[SW1]interface g0/0/1 //進入接口
[SW1-GigabitEthernet0/0/1]port link-type trunk //設置爲trunk鏈路
[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan all //允許所有VLAN通過
[SW1-GigabitEthernet0/0/1]quit //退出
[SW1]interface g0/0/2 //進入接口
[SW1-GigabitEthernet0/0/2]port link-type trunk //設置爲trunk鏈路
[SW1-GigabitEthernet0/0/2]port trunk allow-pass vlan all //允許所有VLAN通過
[SW1-GigabitEthernet0/0/2]quit //退出
[SW1]
SW2（設置Trunk鏈路和access鏈路）
<Huawei>system-view //進入系統視圖
[Huawei]undo info-center enable //關閉信息告警提示
[Huawei]sysname SW2 //改名
[SW2]vlan batch 10 20 //創建vlan10和vlan20
[SW2]interface g0/0/1 //進入接口
[SW2-GigabitEthernet0/0/1]port link-type access //設置爲access鏈路
[SW2-GigabitEthernet0/0/1]port default vlan 10 //允許vlan10通過
[SW2-GigabitEthernet0/0/1]quit //退出
[SW2]interface g0/0/2 //進入接口
[SW2-GigabitEthernet0/0/2]port link-type access //設置爲access鏈路
[SW2-GigabitEthernet0/0/2]port default vlan 20 //允許vlan20通過
[SW2-GigabitEthernet0/0/2]quit //退出
[SW2]interface g0/0/3 //進入接口
[SW2-GigabitEthernet0/0/3]port link-type trunk //設置爲trunk鏈路
[SW2-GigabitEthernet0/0/3]port trunk allow-pass vlan all //允許所有VLAN通過
[SW2-GigabitEthernet0/0/3]quit //退出
[SW2]
SW3（設置Trunk鏈路和access鏈路）
<Huawei>system-view //進入系統視圖
[Huawei]undo info-center enable //關閉信息告警提示
[Huawei]sysname SW3 //改名
[SW3]vlan batch 10 20 //創建vlan10和vlan20
[SW3]interface g0/0/1 //進入接口
[SW3-GigabitEthernet0/0/1]port link-type access //設置爲access鏈路
[SW3-GigabitEthernet0/0/1]port default vlan 10 //允許vlan10通過
[SW3-GigabitEthernet0/0/1]quit //退出
[SW3]interface g0/0/2 //進入接口
[SW3-GigabitEthernet0/0/2]port link-type access //設置爲access鏈路
[SW3-GigabitEthernet0/0/2]port default vlan 20 //允許vlan20通過
[SW3-GigabitEthernet0/0/2]quit //退出
[SW3]interface g0/0/3 //進入接口
[SW3-GigabitEthernet0/0/3]port link-type trunk //設置爲trunk鏈路
[SW3-GigabitEthernet0/0/3]port trunk allow-pass vlan all //允許所有VLAN通過
[SW3-GigabitEthernet0/0/3]quit //退出
[SW3]
SW1（查看VLAN接口）
[SW1]dis port vlan //查看vlan接口
Port Link Type PVID Trunk VLAN List
-------------------------------------------------------------------------------
GigabitEthernet0/0/1 trunk 1 1-4094 //允許所有vlan通過
GigabitEthernet0/0/2 trunk 1 1-4094 //允許所有vlan通過
GigabitEthernet0/0/3 hybrid 1 -
GigabitEthernet0/0/4 hybrid 1 -
GigabitEthernet0/0/5 hybrid 1 -
GigabitEthernet0/0/6 hybrid 1 -
GigabitEthernet0/0/7 hybrid 1 -
GigabitEthernet0/0/8 hybrid 1 -
GigabitEthernet0/0/9 hybrid 1 -
GigabitEthernet0/0/10 hybrid 1 -
GigabitEthernet0/0/11 hybrid 1 -
GigabitEthernet0/0/12 hybrid 1 -
GigabitEthernet0/0/13 hybrid 1 -
GigabitEthernet0/0/14 hybrid 1 -
GigabitEthernet0/0/15 hybrid 1 -
GigabitEthernet0/0/16 hybrid 1 -
GigabitEthernet0/0/17 hybrid 1 -
GigabitEthernet0/0/18 hybrid 1 -
GigabitEthernet0/0/19 hybrid 1 -
GigabitEthernet0/0/20 hybrid 1 -
GigabitEthernet0/0/21 hybrid 1 -
GigabitEthernet0/0/22 hybrid 1 -
GigabitEthernet0/0/23 hybrid 1 -
GigabitEthernet0/0/24 hybrid 1 -
[SW1]
SW2（查看VLAN接口）
[SW2]dis port vlan //查看vlan接口
Port Link Type PVID Trunk VLAN List
-------------------------------------------------------------------------------
GigabitEthernet0/0/1 access 10 - //允許vlan10通過
GigabitEthernet0/0/2 access 20 - //允許vlan20通過
GigabitEthernet0/0/3 trunk 1 1-4094 //允許所有vlan通過
GigabitEthernet0/0/4 hybrid 1 -
GigabitEthernet0/0/5 hybrid 1 -
GigabitEthernet0/0/6 hybrid 1 -
GigabitEthernet0/0/7 hybrid 1 -
GigabitEthernet0/0/8 hybrid 1 -
GigabitEthernet0/0/9 hybrid 1 -
GigabitEthernet0/0/10 hybrid 1 -
GigabitEthernet0/0/11 hybrid 1 -
GigabitEthernet0/0/12 hybrid 1 -
GigabitEthernet0/0/13 hybrid 1 -
GigabitEthernet0/0/14 hybrid 1 -
GigabitEthernet0/0/15 hybrid 1 -
GigabitEthernet0/0/16 hybrid 1 -
GigabitEthernet0/0/17 hybrid 1 -
GigabitEthernet0/0/18 hybrid 1 -
GigabitEthernet0/0/19 hybrid 1 -
GigabitEthernet0/0/20 hybrid 1 -
GigabitEthernet0/0/21 hybrid 1 -
GigabitEthernet0/0/22 hybrid 1 -
GigabitEthernet0/0/23 hybrid 1 -
GigabitEthernet0/0/24 hybrid 1 -
[SW2]
SW3（查看VLAN接口）
[SW3]dis port vlan //查看vlan接口
Port Link Type PVID Trunk VLAN List
-------------------------------------------------------------------------------
GigabitEthernet0/0/1 access 10 - // 允許vlan10通過
GigabitEthernet0/0/2 access 20 - //允許vlan20通過
GigabitEthernet0/0/3 trunk 1 1-4094 //允許所有vlan通過
GigabitEthernet0/0/4 hybrid 1 -
GigabitEthernet0/0/5 hybrid 1 -
GigabitEthernet0/0/6 hybrid 1 -
GigabitEthernet0/0/7 hybrid 1 -
GigabitEthernet0/0/8 hybrid 1 -
GigabitEthernet0/0/9 hybrid 1 -
GigabitEthernet0/0/10 hybrid 1 -
GigabitEthernet0/0/11 hybrid 1 -
GigabitEthernet0/0/12 hybrid 1 -
GigabitEthernet0/0/13 hybrid 1 -
GigabitEthernet0/0/14 hybrid 1 -
GigabitEthernet0/0/15 hybrid 1 -
GigabitEthernet0/0/16 hybrid 1 -
GigabitEthernet0/0/17 hybrid 1 -
GigabitEthernet0/0/18 hybrid 1 -
GigabitEthernet0/0/19 hybrid 1 -
GigabitEthernet0/0/20 hybrid 1 -
GigabitEthernet0/0/21 hybrid 1 -
GigabitEthernet0/0/22 hybrid 1 -
GigabitEthernet0/0/23 hybrid 1 -
GigabitEthernet0/0/24 hybrid 1 -
[SW3]
SW1（配置SVI）
[SW1]interface Vlanif 10 //進入vlanif10
[SW1-Vlanif10]ip address 192.168.10.254 24 //設置IP地址
[SW1-Vlanif10]quit //退出
[SW1]interface Vlanif 20 //進入vlanif20
[SW1-Vlanif20]ip address 192.168.20.254 24 //設置IP地址
[SW1-Vlanif20]quit //退出
[SW1]
PC1（測試是否可以全網互通）
PC>ping 192.168.20.1 //測試是否可以ping通PC2
Ping 192.168.20.1: 32 data bytes, Press Ctrl_C to break
From 192.168.20.1: bytes=32 seq=1 ttl=127 time=125 ms //ping通
From 192.168.20.1: bytes=32 seq=2 ttl=127 time=62 ms
From 192.168.20.1: bytes=32 seq=3 ttl=127 time=78 ms
From 192.168.20.1: bytes=32 seq=4 ttl=127 time=78 ms
From 192.168.20.1: bytes=32 seq=5 ttl=127 time=109 ms
--- 192.168.20.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 62/90/125 ms
PC>ping 192.168.10.2 //測試是否可以ping通PC3
Ping 192.168.10.2: 32 data bytes, Press Ctrl_C to break
From 192.168.10.2: bytes=32 seq=1 ttl=128 time=94 ms //ping通
From 192.168.10.2: bytes=32 seq=2 ttl=128 time=62 ms
From 192.168.10.2: bytes=32 seq=3 ttl=128 time=109 ms
From 192.168.10.2: bytes=32 seq=4 ttl=128 time=78 ms
From 192.168.10.2: bytes=32 seq=5 ttl=128 time=94 ms
--- 192.168.10.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 62/87/109 ms
PC>ping 192.168.20.2 //測試是否可以ping通PC4
Ping 192.168.20.2: 32 data bytes, Press Ctrl_C to break
From 192.168.20.2: bytes=32 seq=1 ttl=127 time=124 ms //ping通
From 192.168.20.2: bytes=32 seq=2 ttl=127 time=93 ms
From 192.168.20.2: bytes=32 seq=3 ttl=127 time=78 ms
From 192.168.20.2: bytes=32 seq=4 ttl=127 time=125 ms
From 192.168.20.2: bytes=32 seq=5 ttl=127 time=78 ms
--- 192.168.20.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 78/99/125 ms
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