实验ensp-DHCP全局地址池和接口地址池的配置

DHCP全局地址池和接口地址池的配置

DHCP支持配置两种地址池，包括全局地址池和接口地址池

拓扑图（接口地址池）

实验步骤

dhcp enable：用来使能DHCP功能。在配置DHCP服务器时，必须先执行dhcp enable命令，才能配置DHCP的其他功能并生效。
dhcp select interface：用来关联接口和接口地址池，为连接到接口的主机提供配置信息。在本示例中，接口GigabitEthernet 0/0/0被加入接口地址池中。
dhcp server dns-list：用来指定接口地址池下的DNS服务器地址。
dhcp server excluded-ip-address：用来配置接口地址池中不参与自动分配的IP地址范围。
dhcp server lease:用来配置DHCP服务器接口地址池中IP地址的租用有效期限功能。缺省情况下，接口地址池中IP地址的租用有效期限为1天。

1.在AR1上配置接口ip

[AR1]int g0/0/1
[AR1-GigabitEthernet0/0/1]ip add 192.168.2.254 24
[AR1-GigabitEthernet0/0/1]int g0/0/0
[AR1-GigabitEthernet0/0/0]ip add 192.168.1.254 24

2.配置DHCP服务器

[AR1]dhcp enable
Info: The operation may take a few seconds. Please wait for a moment.done.
[AR1]int g0/0/0	
[AR1-GigabitEthernet0/0/0]dhcp select interface 
[AR1-GigabitEthernet0/0/0]dhcp server dns-list 192.168.1.254	
[AR1-GigabitEthernet0/0/0]dhcp server excluded-ip-address 192.168.1.1 192.168.1.9
[AR1-GigabitEthernet0/0/0]dhcp server lease day 3
[AR1-GigabitEthernet0/0/0]int g0/0/1
[AR1-GigabitEthernet0/0/1]dhcp select interface 

3.查看DHCP服务是否成功分配地址,可以看到已经成功分配了IP地址。

PC>ipconfig

Link local IPv6 address...........: fe80::5689:98ff:fe4e:3c47
IPv6 address......................: :: / 128
IPv6 gateway......................: ::
IPv4 address......................: 192.168.1.253
Subnet mask.......................: 255.255.255.0
Gateway...........................: 192.168.1.254
Physical address..................: 54-89-98-4E-3C-47
DNS server........................: 192.168.1.254


PC>ping 192.168.1.252

Ping 192.168.1.252: 32 data bytes, Press Ctrl_C to break
From 192.168.1.252: bytes=32 seq=1 ttl=128 time=47 ms
From 192.168.1.252: bytes=32 seq=2 ttl=128 time=32 ms
From 192.168.1.252: bytes=32 seq=3 ttl=128 time=31 ms

--- 192.168.1.252 ping statistics ---
  3 packet(s) transmitted
  3 packet(s) received
  0.00% packet loss
  round-trip min/avg/max = 31/36/47 ms

PC>ping 192.168.2.254

Ping 192.168.2.254: 32 data bytes, Press Ctrl_C to break
From 192.168.2.254: bytes=32 seq=1 ttl=255 time=63 ms

拓扑图（全局地址池）

实验步骤

ip pool:用来创建全局地址池。
network:用来配置全局地址池下可分配的网段地址。
gateway-list:用来配置DHCP服务器全局地址池的出口网关地址。
lease:用来配置DHCP全局地址池下的地址租期。缺省情况下，IP地址租期是1天。
dhcp select global:用来给接口选择地址池。

1.配置AR1的接口ip

[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]ip add 192.168.1.1 24
[Huawei-GigabitEthernet0/0/0]int g0/0/1
[Huawei-GigabitEthernet0/0/1]ip add 192.168.2.1 24
[Huawei-GigabitEthernet0/0/1]q

2.配置DHCP服务

[Huawei]dhcp enable 
Info: The operation may take a few seconds. Please wait for a moment.done.
[Huawei]ip pool pool1
Info: It's successful to create an IP address pool.
[Huawei-ip-pool-pool1]gateway-list 192.168.1.1
[Huawei-ip-pool-pool1]network 192.168.1.0 mask 255.255.255.0
[Huawei-ip-pool-pool1]dns-list 1.1.1.1
[Huawei-ip-pool-pool1]excluded-ip-address 192.168.1.10
[Huawei-ip-pool-pool1]lease day 3
[Huawei-ip-pool-pool1]q
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]dhcp select global 
[Huawei-GigabitEthernet0/0/0]q
[Huawei]ip pool pool2
Info: It's successful to create an IP address pool.
[Huawei-ip-pool-pool2]gateway-list 192.168.2.1
[Huawei-ip-pool-pool2]network 192.168.2.0 mask 24
[Huawei-ip-pool-pool2]lease day 3
[Huawei-ip-pool-pool2]q
[Huawei]int g0/0/1
[Huawei-GigabitEthernet0/0/1]dhcp select global 
[Huawei-GigabitEthernet0/0/1]q
[Huawei]

3.ipconfig查看DHCP是否配置成功

PC>ipconfig /renew

IP Configuration


Link local IPv6 address...........: fe80::5689:98ff:feef:2162
IPv6 address......................: :: / 128
IPv6 gateway......................: ::
IPv4 address......................: 192.168.1.254
Subnet mask.......................: 255.255.255.0
Gateway...........................: 192.168.1.1
Physical address..................: 54-89-98-EF-21-62
DNS server........................: 1.1.1.1

4.使用display ip pool命令查看地址池,在这里可以看出，一共是506个地址 ，其中我排除了一个地址192.168.1.10，dhcp分配了2个地址，所以 Idle显示的就是503个地址

[Huawei]dis ip pool 
  -----------------------------------------------------------------------
  Pool-name      : pool1
  Pool-No        : 0
  Position       : Local           Status           : Unlocked
  Gateway-0      : 192.168.1.1     
  Mask           : 255.255.255.0
  VPN instance   : --

  -----------------------------------------------------------------------
  Pool-name      : pool2
  Pool-No        : 1
  Position       : Local           Status           : Unlocked
  Gateway-0      : 192.168.2.1     
  Mask           : 255.255.255.0
  VPN instance   : --


  IP address Statistic
    Total       :506   
    Used        :2          Idle        :503   
    Expired     :0          Conflict    :0          Disable   :1