华为交换机配置dhcp中继

华为交换机配置dhcp中继

r1_2022.05.07.21时57分05秒.txt

sw1_2022.05.07.21时57分21秒.txt

（1）拓扑图

（2）交换机sw1

dhcp enable

dhcp server group 1
 dhcp-server 12.12.12.2 0
 
 #
interface Vlanif1
 ip address 192.168.1.254 255.255.255.0
 dhcp select relay
 dhcp relay server-select 1
#
interface Vlanif2
 ip address 192.168.2.254 255.255.255.0
 dhcp select relay
 dhcp relay server-select 1
#
interface Vlanif3
 ip address 12.12.12.1 255.255.255.0
 interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
 port link-type access
 port default vlan 2                      
#
interface GigabitEthernet0/0/3
 port link-type access
 port default vlan 3

（3）dhcp服务器r1

dhcp enable

ip pool 1
 gateway-list 192.168.1.254
 network 192.168.1.0 mask 255.255.255.0
 dns-list 223.5.5.5 223.6.6.6
#
ip pool 2
 gateway-list 192.168.2.254
 network 192.168.2.0 mask 255.255.255.0
 dns-list 223.5.5.5 223.6.6.6
 #往核心交换机方向的接口上需要配置dhcp全局选择命令
 interface GigabitEthernet0/0/0
 ip address 12.12.12.2 255.255.255.0      
 dhcp select global

#R1路由器需要与192.168.1.254与192.168.2.254通信
ip route-static 0.0.0.0 0.0.0.0 12.12.12.1

（4）电脑测试自动获取ip地址

抓包，可以看得出，源地址为用户所在的vlan的网关。所以要保证dhcp服务器到此ip通。

DHCP服务器与MAC地址绑定、snooping（列表、list、全）maclist、dhcplist、dhcpsnoopinglist
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