Step 6 describes how to set the DHCP service

We will introduce the content of the DHCP service in six aspects. We have made a clear explanation of each step and hope everyone can master it. So, sometimes, some medium and high-end network equipment routers and switches have already integrated the DHCP service, so we can implement the DHCP service on the network equipment, no dedicated hosts are used as DHCP servers to save costs.

The following is an instance for configuring DHCP on a cisco router.

Set DHCP Service 1. Specify the range of IP addresses not automatically assigned

 
 

  
  
Ip dhcp excluded-address 10.1.1.1 10.1.1.19 // the ip address from 10.1.1.1 to 10.1.1.19 is manually assigned.
 
 

Set DHCP Service 2. Set DHCP protocol address pool

 
 

  
  
Ip dhcp pool global
  
  
 
  
  
// This command specifies the DHCP address pool name
  
  
 
  
  
Network 10.1.0.0 255.255.0.0
  
  
 
  
  
// Dynamically assigned IP address range, except for the non-automatically assigned IP addresses specified before all IP addresses in the 10.1.0.0 network segment)
 
 

Set DHCP Service 3. Set DHCP protocol additional information

 
 

  
  
Domain-name client.com
  
  
 
  
  
// Configure the domain suffix for the client
  
  
 
  
  
Dns-server 10.1.1.1 10.1.1.2
  
  
 
  
  
// Configure the IP address of the DNS server for the client, which is 10.1.1.1 and 10.1.1.2.
  
  
 
  
  
Netbios-name-server 10.1.1.5 10.1.1.6
  
  
 
  
  
// Configure the WINS server address for the client, which is 10.1.1.5 and 10.1.1.6
  
  
 
  
  
Netbios-node-type h-node
  
  
 
  
  
// Configuring the node mode for the client affects the smoothness of name interpretation. For example, h-node is explained by the wins server first)
  
  
 
  
  
Default-router 10.1.0.100 10.1.0.101
  
  
 
  
  
// Configure the default gateway for the client
 
 

Set DHCP Service 4. Set the lease term

 
 

  
  
Lease 8
  
  
 
  
  
// Set the lease time to 8 days
 
 

Set DHCP Service 5. Sometimes we need to set the sub-address pool of the DHCP protocol server. For example, we want the gateway of the client in the 10.1.1.0/24 network segment to 10.1.1.100. We set it as follows:

 
 

  
  
Ip dhcp pool subglobal
  
  
 
  
  
Network 10.1.1.0 255.255.255.0
  
  
 
  
  
// The Sub-address pool of global, which inherits domain name and other options from global
  
  
 
  
  
Default-router 10.1.1.100 10.1.1.101
  
  
 
  
  
// Configure the default gateway for the client
 
 

Set DHCP Service 6. Related DHCP Debugging commands

 
 

  
  
No service dhcp
  
  
 
  
  
// Stop the DHCP protocol service
  
  
 
  
  
Show ip dhcp binding
  
  
 
  
  
// Display Address allocation information
  
  
 
  
  
Show ip dhcp conflict
  
  
 
  
  
// Displays address conflicts.