DHCP中继实验
实验拓扑
实验需求
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按照图示搭建拓扑并配置IP地址
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配置RTA为DHCP服务器，能够跨网段为192.168.20.0/24网段自动分配IP地址，要求分配DNS地址为8.8.8.8
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PC1获取地址后，能够访问到192.168.10.1
实验解析
1、配置IP地址
[RTA]int g0/0 [RTA-GigabitEthernet0/0]ip address 192.168.10.1 24 [SWA]int g1/0/1 [SWA-GigabitEthernet1/0/1]port link-mode route [SWA-GigabitEthernet1/0/1]ip address 192.168.10.2 24 [SWA-GigabitEthernet1/0/1]int g1/0/2 [SWA-GigabitEthernet1/0/2]port link-mode route [SWA-GigabitEthernet1/0/2]ip address 192.168.20.254 24
2、配置RTA为DHCP服务器，能够跨网段为192.168.20.0/24网段自动分配IP地址，要求分配DNS地址为8.8.8.8
步骤1：在RTA上开启DHCP服务，创建地址池为1号，宣告网段192.168.20.0/24，网关地址为192.168.20.254，DNS服务器地址为8.8.8.8,配置一条静态默认路由指向192.168.10.2
[RTA]dhcp enable [RTA]dhcp server ip-pool 1 [RTA-dhcp-pool-1]network 192.168.20.0 24 [RTA-dhcp-pool-1]gateway-list 192.168.20.254 [RTA-dhcp-pool-1]dns-list 8.8.8.8 [RTA]ip route-static 0.0.0.0 0 192.168.10.2
步骤2：在SWA上开启DHCP功能，并在连接客户端的接口上开启DHCP中继功能，并指定DHCP服务器的IP地址
[SWA]dhcp enable [SWA]int g1/0/2 [SWA-GigabitEthernet1/0/2]dhcp select relay [SWA-GigabitEthernet1/0/2]dhcp relay server-address 192.168.10.1
3、PC1获取地址后，能够访问到192.168.10.1
步骤1：在RTA上通过display dhcp server ip-in-use命令查看下发的IP地址
[RTA]dis dhcp server ip-in-use IP address Client identifier/ Lease expiration Type Hardware address 192.168.20.1 0035-3665-632e-3833- Jan 16 16:14:40 2024 Auto(C) 6439-2e30-3330-362d- 4745-302f-302f-31
步骤2：在PC1上查看获取的IP地址
步骤3：在PC1上ping RTA的IP地址
<H3C>ping 192.168.10.1 Ping 192.168.10.1 (192.168.10.1): 56 data bytes, press CTRL_C to break 56 bytes from 192.168.10.1: icmp_seq=0 ttl=254 time=0.803 ms 56 bytes from 192.168.10.1: icmp_seq=1 ttl=254 time=0.709 ms 56 bytes from 192.168.10.1: icmp_seq=2 ttl=254 time=0.710 ms 56 bytes from 192.168.10.1: icmp_seq=3 ttl=254 time=0.678 ms 56 bytes from 192.168.10.1: icmp_seq=4 ttl=254 time=0.871 ms