Setting The Dhcp Server Configuration - Motorola AP-6511 Reference Manual

Motorola Solutions AP-6511 Access Point System Reference Guide

9.2 Setting the DHCP Server Configuration

Dynamic Host Configuration Protocol (DHCP) allows hosts on an IP network to request and be assigned IP
addresses as well as discover information about the network where they reside. Each subnet can be
configured with its own address pool. Whenever a DHCP client requests an IP address, the DHCP server
assigns an IP address from that subnet's address pool. When the DHCP server allocates an address for a
DHCP client, the client is assigned a lease, which expires after an pre-determined interval. Before a lease
expires, wireless clients (to which leases are assigned) are expected to renew them to continue to use the
addresses. Once the lease expires, the client is no longer permitted to use the leased IP address. The DHCP
server ensures all IP addresses are unique, and no IP address is assigned to a second client while the first
client's assignment is valid (its lease has not expired). Therefore, IP address management is conducted by
the DHCP server, not an administrator.
The DHCP server groups wireless clients based on defined user-class option values. Clients with a defined
set of user class values are segregated by class. A DHCP server can associate multiple classes to each pool.
Each class in a pool is assigned an exclusive range of IP addresses. DHCP clients are compared against
classes. If the client matches one of the classes assigned to the pool, it receives an IP address from the range
assigned to the class. If the client doesn't match any of the classes in the pool, it receives an IP address from
a default pool range (if defined). Multiple IP addresses for a single VLAN allow the configuration of multiple
IP addresses, each belonging to different subnet. Class configuration allows a DHCP client to obtain an
address from the first pool to which the class is assigned.
To access and review the DHCP server configuration:
1. Select
The DHCP Server
option values. Clients with a defined set of user class values are segregated by class. A DHCP server can
associate multiple classes to each pool. Each class in a pool is assigned an exclusive range of IP
addresses. DHCP clients are then compared against classes.
9-14
Configuration > Services
screen displays. The DHCP server groups wireless clients based on defined user-class
Figure 9-7 DHCP Server screen
> DHCP Server Policy.