实验ensp-DHCP以及DNS域名解析配置实验

DHCP以及DNS域名解析配置实验

拓扑图

实验步骤

DHCP配置

1.为路由器配置IP地址

<Huawei>sys
[Huawei]sysname RTA
[RTA]int g0/0/0
[RTA-GigabitEthernet0/0/0]ip address 192.168.1.1 24

2.将PC设置为DHCP获取IP

3.打开路由器DHCP服务

[RTA]dhcp enable
[RTA]int g0/0/0	
[RTA-GigabitEthernet0/0/0]dhcp select interface 

4.使用ipconfig查看PC是否被分配ip

5.查看网络连通性

PC>ping 192.168.1.1

Ping 192.168.1.1: 32 data bytes, Press Ctrl_C to break
From 192.168.1.1: bytes=32 seq=1 ttl=255 time=78 ms
From 192.168.1.1: bytes=32 seq=2 ttl=255 time=78 ms
From 192.168.1.1: bytes=32 seq=3 ttl=255 time=79 ms
From 192.168.1.1: bytes=32 seq=4 ttl=255 time=46 ms
From 192.168.1.1: bytes=32 seq=5 ttl=255 time=63 ms

--- 192.168.1.1 ping statistics ---
  5 packet(s) transmitted
  5 packet(s) received
  0.00% packet loss
  round-trip min/avg/max = 46/68/79 ms

DNS域名解析配置

1. 电脑开机，通过dhcp 获取ip地址
2. 电脑输入域名，www.baidu.com
3. 电脑把www.baidu.com发到自己的dns服务器
4. dns服务器把域名解析成对应的ip地址
5. 电脑向百度服务器发送一个请求

1.在DNS Server内添加域名以及对应的ip地址，通过DNS服务器，实现域名解析，将网址转换为对应的ip地址，添加完IP地址别忘记启动DNSServer

2.给DNS Server配置IP地址

3.注意这时候在PC使用ipconfig看到的内容里是没有DNS的

PC>ipconfig

Link local IPv6 address...........: fe80::5689:98ff:fe65:3b03
IPv6 address......................: :: / 128
IPv6 gateway......................: ::
IPv4 address......................: 192.168.1.252
Subnet mask.......................: 255.255.255.0
Gateway...........................: 192.168.1.1
Physical address..................: 54-89-98-65-3B-03
DNS server........................:

4.需要再次进入RTA的G0/0/0的接口视图下进行配置

[RTA]int g0/0/0	
[RTA-GigabitEthernet0/0/0]dhcp server dns-list 192.168.1.100

5.再次查看ipconfig

6.通过ping www.bilibili.com,可以看到域名已经被解析为ip地址且能够ping通

PC>ping www.bilibili.com

Ping www.bilibili.com [192.168.1.200]: 32 data bytes, Press Ctrl_C to break
From 192.168.1.252: Destination host unreachable
From 192.168.1.252: Destination host unreachable
From 192.168.1.252: Destination host unreachable
From 192.168.1.252: Destination host unreachable
From 192.168.1.252: Destination host unreachable

--- 192.168.1.200 ping statistics ---
  5 packet(s) transmitted
  0 packet(s) received
  100.00% packet loss

7.网关是该区域网络的出口

查看路由表，
[RTA]display  ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
         Destinations : 6        Routes : 6        

Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

  100.100.100.0/24  Direct  0    0           D   100.100.100.1   Ethernet0/0/0
  100.100.100.1/32  Direct  0    0           D   127.0.0.1       Ethernet0/0/0
      127.0.0.0/8   Direct  0    0           D   127.0.0.1       InLoopBack0
      127.0.0.1/32  Direct  0    0           D   127.0.0.1       InLoopBack0
    192.168.1.0/24  Direct  0    0           D   192.168.1.1     GigabitEthernet
0/0/0
    192.168.1.1/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
0/0/0

以及查看对应ip的路由信息

[RTA]display ip routing-table 100.100.100.100
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Table : Public
Summary Count : 1
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

  100.100.100.0/24  Direct  0    0           D   100.100.100.1   Ethernet0/0/0