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如何在三層交換機上實現跨VLAN 的DHCP配置
2007-10-08   vlan9.com

3550交換機上的配置:
  
  vlan database(劃分VLAN)
  vlan 2
  vlan 3
  
  
  interface FastEthernet0/2(將端口f0/2劃分入vlan2)
  switchport access vlan 2
  switchport mode access
  no ip address
  !
  interface FastEthernet0/3(將端口f0/3劃分入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 (將DHCP請求的廣播數據包轉化為單播請求,路由器才會響應)
  !
  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(配置第一個VLAN的地址池)
    network 192.168.1.0 255.255.255.0
    default-router 192.168.1.1 (配置PC網關)
  dns-server 202.96.134.133(配置DNS服務器
  
  ip dhcp pool tyl-02(配置第二個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(配置第三個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(配置靜態路由
  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 (將路由器F0/0和3550 VLAN1的IP 地址排除)
  ip dhcp excluded-address 192.168.2.1 (3550 VLAN1的IP 地址排除)
  ip dhcp excluded-address 192.168.3.1 (3550 VLAN1的IP 地址排除)
  

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