H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 32)

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DHCP server configuration
This chapter includes these sections:
• Introduction to DHCP server
• DHCP server configuration task list
• Displaying and maintaining the DHCP server
• DHCP server configuration examples
• Troubleshooting DHCP server configuration
NOTE:
•
The term "switch" or "device" in this chapter refers to the switching engine on a WX3000E wireless
switch.
• The WX3000E series comprises WX3024E and WX3010E wireless switches.
• The port numbers in this chapter are for illustration only.
• The DHCP server configuration is supported only on VLAN interfaces and loopback interfaces. The
secondary IP address pool configuration is not supported on loopback interfaces.
Introduction to DHCP server
Application environment
The DHCP server is well suited to networks where:
• Manual configuration and centralized management are difficult to implement.
• Many hosts need to acquire IP addresses dynamically. This may be because the number of hosts
exceeds the number of assignable IP addresses, so it is impossible to assign a fixed IP address to
each host. For example, an ISP has a limited number of host addresses.
• A few hosts need fixed IP addresses.
DHCP address pool
Address pool types
DHCP address pools include common and extended address pools.
• Common address pool: Supports both static binding and dynamic allocation.
• Extended address pool: Supports only dynamic allocation.
Common address pool structure
The common address pool database is organized as a tree. The root of the tree is the address pool for
natural networks, branches are address pools for subnets, and leaves are addresses statically bound to
clients. For the same level address pools, a previously configured pool has a higher selection priority than
a new one.