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13-3
Cisco ASDM User Guide
OL-16647-01
Chapter 13 DHCP, DNS and WCCP Services
DHCP Relay
Edit DHCP Relay Agent Settings
You can enable the DHCP relay agent and configure the relay agent parameters for the selected interface
in the Edit DHCP Relay Agent Settings dialog box.
Restrictions
• You cannot enable a DHCP relay agent on an interface that has a DHCP relay global server
configured for it.
• You cannot enable a DHCP relay agent on a security appliance that has DHCP server configured on
an interface.
Prerequisites
Before you can enable a DHCP relay agent on an selected interface, you must have at least one DHCP
relay global server in the configuration.
Fields
• Enable DHCP Relay Agent—When checked, enables the DHCP relay agent on the selected
interface. You must have a DHCP relay global server defined before enabling the DHCP relay agent.
• Set Route—Specifies whether the DHCP relay agent is configured to modify the default router
address in the information returned from the DHCP server. When this check box is checked, the
DHCP relay agent substitutes the address of the selected interface for the default router address in
the information returned from the DHCP server.
Modes
The following table shows the modes in which this feature is available:
Add/Edit Global DHCP Relay Server
Define new global DHCP relay servers in the DHCP Relay - Add DHCP Server dialog box or edit
existing server information in the DHCP Relay - Edit DHCP Server dialog box. You can define up to 4
DHCP relay global servers.
Restrictions
You cannot define a global DHCP relay server on an interface with a DHCP server enabled on it.
Fields
• DHCP Server—Specifies the IP address of the external DHCP server to which DHCP requests are
forwarded.
• Interface—Specifies the interface through which DHCP requests are forwarded to the external
DHCP server.
Firewall Mode Security Context
Routed Transparent Single
Multiple
Context System
• • • •—