Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

Table Of Contents
6-44
IP Services—IP Settings, DHCP, and DNS
DHCP Server
Configuring DHCP Relay
Your network might already include a DHCP server. The Wireless Edge
Services xl Module can provide DHCP relay services to this server. A DHCP
server serves only clients on the same subnetwork or VLAN. DHCP relay
passes DHCP requests from clients on one subnetwork to a DHCP server on
a different subnetwork, eliminating the need for a DHCP server on each local
network segment.
To provide DHCP relay services, a VLAN interface must have a static IP
address. (The DHCP client is disabled on the VLAN interface.)
Note Enabling DHCP relay on an interface overrides the DHCP server. That is, the
server will not respond to requests on that interface even if you have config-
ured a pool for it.
Note The gateway interface is the interface through which the Wireless Edge
Services xl Module reaches the external DHCP server. Like the interface that
relays the DHCP requests, the gateway interface cannot run either the DHCP
server or the DHCP client. (That is, the interface requires a static address.)
To configure DHCP relay on the Wireless Edge Services xl Module, complete
these steps:
1. Select Network Setup > DHCP Server and click the Relay tab.
2. Click the Add button. The Add Relay Information screen is displayed.
Figure 6-30. Add Relay Information Screen