如何在三层交换机上实现跨VLAN 的DHCP配置

3550交换机上的配置:
  
   vlan database(划分 VLAN
   vlan 2
   vlan 3
  
  
   interface FastEthernet0/2(将端口 f0/2划分入 vlan2
   switchport access vlan 2
   switchport mode access
   no ip address
   !
   interface FastEthernet0/3(将端口 f0/3划分入 vlan3
   switchport access vlan 3
   switchport mode access
   no ip address
   ......
  
   interface Vlan1
   ip address 192.168.1.2 255.255.255.0
   ip helper-address 192.168.1.1 (DHCP请求的广播数据包转化为单播请求,路由器才会响应 )
   !
   interface Vlan2
   ip address 192.168.2.1 255.255.255.0
   ip helper-address 192.168.1.1
   !
   interface Vlan3
   ip address 192.168.3.1 255.255.255.0
   ip helper-address 192.168.1.1
  
  路由器 2621上的配置 :
   ip dhcp pool tyl-01(配置第一个 VLAN的地址池)
    network 192.168.1.0 255.255.255.0
    default-router 192.168.1.1 (配置 PC网关 )
   dns-server 202.96.134.133(配置 DNS服务器)
  
   ip dhcp pool tyl-02(配置第二个 VLAN的地址池)
    network 192.168.2.0 255.255.255.0
    default-router 192.168.2.1
   dns-server 202.96.134.133
  
   ip dhcp pool tyl-03(配置第三个 VLAN的地址池)
    network 192.168.3.0 255.255.255.0
    default-router 192.168.3.1
   dns-server 202.96.134.133
  
   ip route 192.168.2.0 255.255.255.0 192.168.1.2(配置静态路由)
   ip route 192.168.3.0 255.255.255.0 192.168.1.2
  
   ip dhcp excluded-address 192.168.1.1 192.168.1.2 (将路由器 F0/03550 VLAN1IP 地址排除 )
   ip dhcp excluded-address 192.168.2.1 (3550 VLAN1IP 地址排除 )
   ip dhcp excluded-address 192.168.3.1 (3550 VLAN1IP 地址排除 )
  

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