dhcp工作過程（如圖）
dhcp配置（如圖）
1，基於全域性配置dhcp
[huawei]dhcp enable 開啟dhcp
[huawei]ip pool caiwubu 設定位址組名字
[huawei-ip-pool-caiwubu]network 192.168.1.0 mask 24 設定網段，設定掩碼
[huawei-ip-pool-caiwubu]gateway-list 192.168.1.254 設定閘道器
[huawei-ip-pool-caiwubu]dns-list 222.172.200.68 設定dsn
[huawei-ip-pool-caiwubu]lease day 3 設定更新租期
[huawei]inte***ce g0/0/0
[huawei-gigabitethernet0/0/0]ip add 192.168.1.254 24
huawei-gigabitethernet0/0/0]dhcp select global 在介面上啟用dhcp
[huawei]dhcp enable
[huawei]inte***ce g0/0/0
[huawei-gigabitethernet0/0/0]ip add 192.168.1.254 24
[huawei-gigabitethernet0/0/0]dhcp select inte***ce
[huawei-gigabitethernet0/0/0]dhcp server dns-list 222.172.200.68
[huawei-gigabitethernet0/0/0]dhcp server lease day 3
[huawei-gigabitethernet0/0/0]dhcp server excluded-ip-address 192.168.1.200
3，配置dhcp中繼
r1配置
[huawei]dhcp enable
[huawei]inte***ce g0/0/0
[huawei-gigabitethernet0/0/0]ip add 10.10.10.1 24
[huawei-gigabitethernet0/0/0]dhcp select global
[[huawei]ip route-static 0.0.0.0 0 10.10.10.2
[huawei]ip pool caiwubu
[huawei-ip-pool-caiwubu]network 192.168.1.0 mask 255.255.255.0
[huawei-ip-pool-caiwubu]gateway-list 192.168.1.254
[huawei-ip-pool-caiwubu]dns-list 222.172.200.68
[huawei-ip-pool-caiwubu]excluded-ip-address 192.168.1.200
r2配置
[huawei]inte***ce g0/0/0
[huawei-gigabitethernet0/0/0]ip address 10.10.10.2 24
[huawei]inte***ce g0/0/1
[huawei-gigabitethernet0/0/1]ip address 192.168.1.254 24
huawei]dhcp enable
[huawei]inte***ce g0/0/1
awei-gigabitethernet0/0/1]dhcp relay server-ip 10.10.10.1
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