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VLAN 间路由
VLAN 间路由
vlan 10 vlan 20
vlan 30
VLAN 间路由
vlan 10 vlan 20
vlan 30
VLAN 间路由
vlan 10 vlan 20 vlan 30
VLAN 间路由
vlan 10 vlan 20 vlan 30
FastEthernet 1/1.1
1/1.2
1/1.3
三层交换机与路由器比较
L3 交换机 路由器
广域口少，局域网口多 广域网接口广泛
支持的路由协议较少 支持多种路由协议
依靠 vlan 隔绝广播 可以隔绝广播
网络号是赋给 vlan 的 网络号是赋给端口的
采用硬件，路由速度快 采用软件，路由速度慢
PC1
PC2
网线 网线
VLAN 间路由
VLAN 100：192.168.1.0/24
VLAN 200： 192.168.2.0/24
VLAN 100接口地址：192.168.1.1
VLAN 200接口地址：192.168.2.1
VLAN 间路由• 划分 VLAN100: 包括端口 e0/0/1-5 ；
– Switch(Config)#vlan 100– Switch(Config-Vlan100)#switchport interface ethernet 0/0/1-5
• 划分 VLAN200: 包括端口 e0/0/6-10 ；– Switch(Config)#vlan 200– Switch(Config-Vlan200)#switchport interface ethernet 0/0/6-10
• 为 VLAN 接口设置 IP 地址；– Switch(Config)#interface vlan 100– Switch(Config-If-Vlan100)#ip address 192.168.1.1 255.255.255.0– Switch(Config)#interface vlan 200– Switch(Config-If-Vlan200)#ip address 192.168.2.1 255.255.255.0
• VLAN100 内主机的缺省网关均需指向 VLAN100 的接口地址：192.168.1.1
• VLAN200 内主机的缺省网关均需指向 VLAN200 的接口地址：192.168.2.1
• 从 VLAN100 内主机 ping VLAN200 内主机，验证三层交换机实现VLAN 间路由。
跨交换机 VLAN 间互通
100
Switch
0/0/1
Switch -1 Switch -2
500
0/0/1
0/0/1 0/0/2
200 300100 200 400
要求• 配置交换机，使所有的 VLAN 之间通过三
层链路互通；
Switch-1• hostname Switch-1• vlan 100
– switchport interface ethernet 0/0/16-20• vlan 200
– switchport interface ethernet 0/0/6-10• vlan 300
– switchport interface ethernet 0/0/11-15• interface ethernet 0/0/1
– switchport mode trunk– switchport trunk allowed vlan 100;200;300
Switch-2• hostname Switch-2• vlan 100
– switchport interface ethernet 0/0/16-20• vlan 200
– switchport interface ethernet 0/0/6-10• vlan 400
– switchport interface ethernet 0/0/11-15• interface ethernet 0/0/1
– switchport mode trunk– switchport trunk allowed vlan 100;200;400
Switch 二层配置• vlan 100• vlan 200• vlan 300• vlan 400• vlan 500
– switchport interface ethernet 0/0/11-15• interface ethernet 0/0/1
– switchport mode trunk– switchport trunk allowed vlan 100;200;300
• interface ethernet 0/0/2– switchport mode trunk– switchport trunk allowed vlan 100;200;400
Switch 三层配置• interface vlan 100
– ip address 192.168.10.1 255.255.255.0• interface vlan 200
– ip address 192.168.20.1 255.255.255.0• interface vlan 300
– ip address 192.168.30.1 255.255.255.0• interface vlan 400
– ip address 192.168.40.1 255.255.255.0• interface vlan 500
– ip address 192.168.50.1 255.255.255.0
• show vlan• show ip route
实验 四
100
Switch
0/0/1-2
Switch-1 Switch-2
500
0/0/1-2
0/0/1-2 0/0/3-4
200 300100 200 400
链路聚合 链路聚合
Switch-1• hostname Switch-1• interface ethernet 0/0/1-2
– port-group 1 mode on• vlan 100
– switchport interface ethernet 0/0/16-20• vlan 200
– switchport interface ethernet 0/0/6-10• vlan 300
– switchport interface ethernet 0/0/11-15• interface port-channel 1
– switchport mode trunk– switchport trunk allowed vlan 100;200;300
Switch-2• hostname Switch-2• interface ethernet 0/0/1-2
– port-group 2 mode on• vlan 100
– switchport interface ethernet 0/0/16-20• vlan 200
– switchport interface ethernet 0/0/6-10• vlan 400
– switchport interface ethernet 0/0/11-15• interface port-channel 2
– switchport mode trunk– switchport trunk allowed vlan 100;200;400
Switch 二层配置• interface ethernet 0/0/1-2
– port-group 1 mode on• interface ethernet 0/0/3-4
– port-group 2 mode on• vlan 100• vlan 200• vlan 300• vlan 400• vlan 500
– switchport interface ethernet 0/0/11-15• interface port-channel 1
– switchport mode trunk– switchport trunk allowed vlan 100;200;300
• interface port-channel 2– switchport mode trunk– switchport trunk allowed vlan 100;200;400
Switch 三层配置• interface vlan 100
– ip address 192.168.10.1 255.255.255.0• interface vlan 200
– ip address 192.168.20.1 255.255.255.0• interface vlan 300
– ip address 192.168.30.1 255.255.255.0• interface vlan 400
– ip address 192.168.40.1 255.255.255.0• interface vlan 500
– ip address 192.168.50.1 255.255.255.0
• show vlan• show ip route
