Users Guide

Table 25. DHCP Server Responsibilities
DHCP Server Responsibility Description
Address Storage and Management DHCP servers are the owners of the addresses used by DHCP
clients. The server stores the addresses and manages their
use, keeping track of which addresses have been allocated
and which are still available.
Configuration Parameter Storage and Management DHCP servers also store and maintain other parameters that
are sent to clients when requested. These parameters specify
in detail how a client is to operate.
Lease Management DHCP servers use leases to allocate addresses to clients for a
limited time. The DHCP server maintains information about
each of the leases, including lease length.
Responding To Client Requests DHCP servers respond to different types of requests from
clients, primarily, granting, renewing, and terminating leases.
Providing Administration Services DHCP servers include functionality that allows an
administrator to implement policies that govern how DHCP
performs its other tasks.
NOTE: DHCP server is not supported on VLT.
Configuring the Server for Automatic Address Allocation
Automatic address allocation is an address assignment method by which the DHCP server leases an IP address to a client from
a pool of available addresses.
An address pool is a range of IP addresses that the DHCP server may assign. The subnet number indexes the address pools.
To create an address pool, follow these steps.
1 Access the DHCP server CLI context.
CONFIGURATION mode
ip dhcp server
2 Create an address pool and give it a name.
DHCP mode
pool name
3 Specify the range of IP addresses from which the DHCP server may assign addresses.
DHCP <POOL> mode
network network/prefix-length
• network: the subnet address.
• prefix-length: specifies the number of bits used for the network portion of the address you specify.
The prefix-length range is from 17 to 31.
4 Display the current pool configuration.
DHCP <POOL> mode
show config
Dynamic Host Configuration Protocol (DHCP) 332