H3C Technologies H3C S12500 Series Switches - Manual (Page 35)

22
5B
DHCP overview
The Dynamic Host Configuration Protocol (DHCP) provides a framework to assign configuration
information to network devices.
664H
Figure 9 shows a typical DHCP application scenario where the DHCP clients and the DHCP server reside
on the same subnet. The DHCP clients can also obtain configuration parameters from a DHCP server on
another subnet through a DHCP relay agent. For more information about the DHCP relay agent, see
"
665H
Configuring the DHCP relay agent ."
Figure 9 A typical DHCP application
NOTE:
The device operates in IRF or standalone (the default) mode. For information about IRF mode, see IRF
Configuration Guide.
44B
DHCP address allocation
183B
Allocation mechanisms
DHCP supports the following allocation mechanisms:
• Static allocation—The network administrator assigns an IP address to a client, such as a WWW
server, and DHCP conveys the assigned address to the client.
• Automatic allocation—DHCP assigns a permanent IP address to a client.
• Dynamic allocation—DHCP assigns an IP address to a client for a limited period of time, which is
called a lease. Most DHCP clients obtain their addresses in this way.