VLAN实验

如图所示：图中共有四个广播域，左边逻辑的分为两个广播域，右边也是逻辑的分为两个广播域，

配置顺序先配置交换机，在配置路由器

SW1 配置：

1、首先创建vlan

[sw1]vlan batch 2 3

2、把对应接口划入VLAN

​ 因为是交换机和电脑连接的口，所以链路类型为access

​ 这个口所属的 VLAN 为 VLAN 2，相当于把0/0/2划入vlan 2

0/0/2接口配置：

[sw1-GigabitEthernet0/0/2]port link-type access
[sw1-GigabitEthernet0/0/2]port default vlan 2

同样0/0/3接口配置：

[sw1-GigabitEthernet0/0/3]port link-type access
[sw1-GigabitEthernet0/0/3]port default vlan 3

3、配置trunk干道

交换机与交换机相连配置链路类型为trunk

[sw1-GigabitEthernet0/0/1]port link-type trunk
[sw1-GigabitEthernet0/0/1]port trunk allow-pass vlan all

4、配置VLAN间路由：

sw1 无直连路由

SW2 配置：

<sw2>undo terminal monitor      -------去除配置成功后的日志：
[sw2]vlan batch 2 3
[sw2]int g 0/0/3
[sw2-GigabitEthernet0/0/3]p l a
[sw2-GigabitEthernet0/0/3]p d v 2
[sw2-GigabitEthernet0/0/3]int g 0/0/4
[sw2-GigabitEthernet0/0/4]p l a
[sw2-GigabitEthernet0/0/4]p d v 3
[sw2-GigabitEthernet0/0/4]int g 0/0/2
[sw2-GigabitEthernet0/0/2]p l t
[sw2-GigabitEthernet0/0/2]p t a v a
[sw2-GigabitEthernet0/0/2]int g 0/0/1
[sw2-GigabitEthernet0/0/1]p l t
[sw2-GigabitEthernet0/0/1]p t a v a
[sw2-GigabitEthernet0/0/1]

SW3 配置：

<sw3>undo terminal monitor
[sw3]vlan batch 2 3
[sw3]int g 0/0/2
[sw3-GigabitEthernet0/0/2]p l a
[sw3-GigabitEthernet0/0/2]p d v 2
[sw3-GigabitEthernet0/0/2]int g 0/0/3
[sw3-GigabitEthernet0/0/3]p l a
[sw3-GigabitEthernet0/0/3]p d v 3
[sw3-GigabitEthernet0/0/3]int g 0/0/1
[sw3-GigabitEthernet0/0/1]p l t
[sw3-GigabitEthernet0/0/1]p t a v a
[sw3-GigabitEthernet0/0/1]

配完以后，我们要想做到一个跨VLAN的通讯的话，我们要配置路由器

首先一共是四个广播域，对应接口分别管对应广播域的VLAN，网段划分如下：

先0/0/0口，创建VLAN，创建子接口0/0/0.1，子接口对应 vlan 2 网关配置，划分vlan，记得开启arp，

[r1]vlan batch 2 3
[r1]interface GigabitEthernet 0/0/0.1
[r1-GigabitEthernet0/0/0.1]ip address 192.168.1.254 24
[r1-GigabitEthernet0/0/0.1]dot1q termination vid 2
[r1-GigabitEthernet0/0/0.1]arp broadcast enable

同理子接口0/0/0.2配置VLAN 3

[r1]interface GigabitEthernet 0/0/0.2
[r1-GigabitEthernet0/0/0.2]ip address 192.168.2.254 24
[r1-GigabitEthernet0/0/0.2]dot1q termination vid 3
[r1-GigabitEthernet0/0/0.2]arp broadcast enable

然后0/0/1口，同样创建子接口0/0/1.1，子接口对应 vlan 2 网关配置，划分vlan，记得开启arp

[r1]interface GigabitEthernet 0/0/1.1
[r1-GigabitEthernet0/0/1.1]ip address 192.168.3.254 24
[r1-GigabitEthernet0/0/1.1]dot1q termination vid 2
[r1-GigabitEthernet0/0/1.1]arp broadcast enable

同理子接口0/0/1.2配置VLAN 3

[r1]interface GigabitEthernet 0/0/1.2
[r1-GigabitEthernet0/0/1.2]ip address 192.168.4.254 24
[r1-GigabitEthernet0/0/1.2]dot1q termination vid 3
[r1-GigabitEthernet0/0/1.2]arp broadcast enable

要去电脑使用DHCP获取，所以路由开启DHCP

1、开启DCHP

[r1]dhcp enable

2、创建IP池，宣告，网关，DNS

四个网段，所以创建四个池

aa

[r1]ip pool aa
[r1-ip-pool-aa]network 192.168.1.0 mask 24
[r1-ip-pool-aa]gateway-list 192.168.1.254
[r1-ip-pool-aa]dns-list 114.114.114.114

bb

[r1]ip pool bb
[r1-ip-pool-bb]network 192.168.2.0 mask 24
[r1-ip-pool-bb]gateway-list 192.168.2.254
[r1-ip-pool-bb]dns-list 114.114.114.114

cc

[r1]ip pool cc
[r1-ip-pool-cc]network 192.168.3.0 mask 24
[r1-ip-pool-cc]gateway-list 192.168.3.254
[r1-ip-pool-cc]dns-list 114.114.114.114

dd

[r1]ip pool dd
[r1-ip-pool-dd]network 192.168.4.0 mask 24
[r1-ip-pool-dd]gateway-list 192.168.4.254
[r1-ip-pool-dd]dns-list 114.114.114.114

进入对应的接口选取配置

[r1]int g 0/0/0.1
[r1-GigabitEthernet0/0/0.1]dhcp select global 

[r1]int g 0/0/0.2
[r1-GigabitEthernet0/0/0.2]dhcp select global

[r1]int g 0/0/1.1
[r1-GigabitEthernet0/0/1.1]dhcp select global

[r1]int g 0/0/1.2
[r1-GigabitEthernet0/0/1.2]dhcp select global

全网可达完成