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DHCP(Dynamic Host Configuration Protocol,动态主机配置协议)是IETF为实现IP的自动配置而设计的协议,它可以为客户机自动分配IP地址、子网掩码以及缺省网关、DNS服务 器的IP地址等TCP/IP参数
第一步:客户端通过广播发送DHCP Discover 报文寻找服务器端
第二步:服务器端通过单播发送DHCP Offer 报文向客户端提供IP地址等网络信息
第三步:客户端通过广播DHCP Request 报文告知服务器端本地选择使用哪个IP地址
第四步:服务器通过DHCP Ack报文告知客户端IP地址是合法可用的
system-view [Huawei]sysname SW1[SW1]vlan bat 10 20 '//连续添加vlan'[SW1]interface Ethernet 0/0/1 '//进入接口'[SW1-Ethernet0/0/1]port link-type access '//设置接口模式'[SW1-Ethernet0/0/1]port default vlan 10 '//划分vlan'[SW1-Ethernet0/0/1]undo shutdown[SW1-Ethernet0/0/1]interface Ethernet 0/0/2[SW1-Ethernet0/0/2]port link-type access [SW1-Ethernet0/0/2]port default vlan 20[SW1-Ethernet0/0/2]undo shutdown[SW1-Ethernet0/0/2]interface Ethernet 0/0/3[SW1-Ethernet0/0/3]port link-type access [SW1-Ethernet0/0/3]port default vlan 10[SW1-Ethernet0/0/3]undo shutdown[SW1-Ethernet0/0/3]interface Ethernet 0/0/4[SW1-Ethernet0/0/4]port link-type access [SW1-Ethernet0/0/4]port default vlan 20[SW1-Ethernet0/0/4]undo shutdown[SW1-Ethernet0/0/4]quit[SW1]interface GigabitEthernet 0/0/1 '//进入接口'[SW1-GigabitEthernet0/0/1]port link-type trunk '//设置接口模式'[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan all '//设置允许通过的vlan'[SW1-GigabitEthernet0/0/1]undo shutdown
system-view [Huawei]sysname R1[R1]dhcp enable [R1]interface GigabitEthernet 0/0/1.1 '//进入接口'[R1-GigabitEthernet0/0/1.1]dot1q termination vid 10 '//选择封装类型并设置vlan归属'[R1-GigabitEthernet0/0/1.1]ip address 192.168.10.1 24[R1-GigabitEthernet0/0/1.1]arp broadcast enable '//开启arp广播'[R1-GigabitEthernet0/0/1.1]dhcp select interface '//基于接口设置DHCP'[R1-GigabitEthernet0/0/1.1]dhcp server dns-list 3.3.3.3 '//设置dns地址'[R1-GigabitEthernet0/0/1.1]undo shutdown [R1-GigabitEthernet0/0/1.1]interface GigabitEthernet 0/0/1.2[R1-GigabitEthernet0/0/1.2]dot1q termination vid 20[R1-GigabitEthernet0/0/1.2]ip address 192.168.20.1 24[R1-GigabitEthernet0/0/1.2]arp broadcast enable [R1-GigabitEthernet0/0/1.2]dhcp select interface [R1-GigabitEthernet0/0/1.2]dhcp server dns-list 2.2.2.2[R1-GigabitEthernet0/0/1.2]undo shutdown [R1-GigabitEthernet0/0/1.2]q[R1]interface GigabitEthernet 0/0/0[R1-GigabitEthernet0/0/0]ip add 12.0.0.1 24[R1-GigabitEthernet0/0/0]undo shutdown [R1]ip route-static 15.0.0.0 24 12.0.0.2 '//添加静态路由'
system-view [Huawei]sysname R2[R2]dhcp enable [R2]interface GigabitEthernet0/0/0 [R2-GigabitEthernet0/0/0]ip add 12.0.0.2 24[R2-GigabitEthernet0/0/0]undo shutdown [R2-GigabitEthernet0/0/0]interface GigabitEthernet0/0/1[R2-GigabitEthernet0/0/1]ip add 15.0.0.1 24[R2-GigabitEthernet0/0/1]undo shutdown [R2-GigabitEthernet0/0/1]quit[R2]ip route-static 192.168.10.0 24 12.0.0.1 '//添加静态路由'[R2]ip route-static 192.168.20.0 24 12.0.0.1[R2]ip pool v11 '//进入ip地址池'[R2-ip-pool-v11]gateway-list 15.0.0.1 '//设置网关'[R2-ip-pool-v11]network 15.0.0.0 mask 24 '//设置网络号和子网掩码'[R2-ip-pool-v11]dns-list 1.1.1.1 '//设置dns地址'[R2-ip-pool-v11]quit[R2]interface GigabitEthernet0/0/1[R2-GigabitEthernet0/0/1]dhcp select global '//选择全局模式分配DHCP'
接口模式步骤1:[R1]dhcp enable '//###全局配置模式开启DHCP功能'步骤2:[R1]interface GigabitEthernet0/0/0.10 '//###进入子接口'[R1-GigabitEthernet0/0/0.10] dhcp select interface '//###基于基于接口配置DHCP'[R1-GigabitEthernet0/0/0.10] dhcp server excluded-ip-address 192.168.10.200 192.168.10.210 '//##192.168.10.200到192.168.10.210不分配地址'[R1-GigabitEthernet0/0/0.10]dhcp server dns-list 8.8.8.8 '//###配置DNS'
全局配置模式步骤1:[R1]dhcp enable '//###全局配置模式开启DHCP功能'步骤2:[R1] ip pool v20[R1-ip-pool-v20] gateway-list 192.168.20.1[R1-ip-pool-v20] network 192.168.20.0 mask 255.255.255.0[R1-ip-pool-v20] dns-list 114.114.114.114[R1-ip-pool-v20] static-bind ip-address 192.168.20.9 mac-address 28d2-4469-5a55 '//#### 绑定 IP 192.168.20.9 固定分配给MAC 为28d2-4469-5a55的机器,需池中IP'[R1-ip-pool-v20] lease day 10 '//####租期10天 '步骤3:[R1]int g0/0/0.20[R1-GigabitEthernet0/0/0.20] dhcp select global '//选择全局模式分配DHCP'固定分配给MAC 为28d2-4469-5a55的机器,需池中IP'[R1-ip-pool-v20] lease day 10 '//####租期10天 '步骤3:[R1]int g0/0/0.20[R1-GigabitEthernet0/0/0.20] dhcp select global '//选择全局模式分配DHCP'
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