Analysis of DHCP port setting commands (1)

In some DHCP server configurations, port settings are indispensable. This is also a core issue for vrouters and vswitches. When using a cisco 3560 instance as a DHCP server, you sometimes need to enable Multiple DHCP servers. So what should we do.

First, we need to disable the switch port and change it to the L3 interface. Configure the IP address. Set the DHCP address pool. After configuring the address pool, ip help-address is used in the interface to specify a service address for client queries. For details, see configuration. The following configuration is successful on the actual 3560 page.

 
 

  
  
Switch # sh run first, let's take a look at the configuration list in the running state.
  
  
Switch # sh running-config
  
  
Building configuration...
  
  
 
  
  
Current configuration: 1326 bytes
  
  
!
  
  
Version 12.2:
  
  
No service pad
  
  
Service timestamps debug uptime
  
  
Service timestamps log uptime
  
  
No service password-encryption
  
  
!
  
  
Hostname Switch
  
  
!
  
  
!
  
  
No aaa new-model
  
  
System mtu routing 1500
  
  
Ip subnet-zero
  
  
No ip domain-lookup
  
  
!
  
  
!
  
  
!
  
  
!
  
  
!
  
  
!
  
  
!
  
  
!
  
  
!
  
  
Spanning-tree mode pvst
  
  
Spanning-tree extend system-id
  
  
!
  
  
Vlan internal allocation policy ascending
  
  
!
  
  
!
  
  
!
  
  
!
  
  
Interface FastEthernet0/1
  
  
Shutdown
  
  
!
  
  
Interface FastEthernet0/2
  
  
!
  
  
Interface FastEthernet0/3
  
  
!
  
  
Interface FastEthernet0/4
  
  
!
  
  
Interface FastEthernet0/5
  
  
!
  
  
Interface FastEthernet0/6
  
  
!
  
  
Interface FastEthernet0/7
  
  
!
  
  
Interface FastEthernet0/8
  
  
!
  
  
Interface FastEthernet0/9
  
  
!
  
  
Interface FastEthernet0/10
  
  
!
  
  
Interface FastEthernet0/11
  
  
!
  
  
Interface FastEthernet0/12
  
  
!
  
  
Interface FastEthernet0/13
  
  
!
  
  
Interface FastEthernet0/14
  
  
!
  
  
Interface FastEthernet0/15
  
  
!
  
  
Interface FastEthernet0/16
  
  
!
  
  
Interface FastEthernet0/17
  
  
!
  
  
Interface FastEthernet0/18
  
  
!
  
  
Interface FastEthernet0/19
  
  
!
  
  
Interface FastEthernet0/20
  
  
!
  
  
Interface FastEthernet0/21
  
  
!
  
  
Interface FastEthernet0/22
  
  
!
  
  
Interface FastEthernet0/23
  
  
No switchport
  
  
Ip address 192.168.100.1 255.255.255.0
  
  
!
  
  
Interface FastEthernet0/24
  
  
!
  
  
Interface GigabitEthernet0/1
  
  
!
  
  
Interface GigabitEthernet0/2
  
  
!
  
  
Interface Vlan1
  
  
No ip address
  
  
!
  
  
Ip classless
  
  
Ip http server
  
  
Ip http secure-server
  
  
!
  
  
!
  
  
!
  
  
Control-plane
  
  
!
  
  
!
  
  
Line con 0
  
  
Line vty 0 4
  
  
Login
  
  
Line vty 5 15
  
  
Login
  
  
!
  
  
End