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51-9
User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 51 Configuring Server Access Settings on Firewall Devices
Configuring DHCP Servers
Add and Edit DHCP Relay IPv6 Server Configuration Dialog Boxes
Use the Add DHCP Relay IPv6 Server Configuration dialog box to define a new DHCPv6 relay server;
use the Edit DHCP Relay IPv6 Server Configuration dialog box to update existing server information.
You can define up to four DHCPv6 relay servers.
Note The Add DHCP Relay IPv6 Server Configuration dialog box and the Edit DHCP Relay IPv6 Server
Configuration dialog box are virtually identical; the following descriptions apply to both.
Navigation Path
You can access the Add and Edit DHCP Relay IPv6 Server Configuration dialog boxes from the DHCP
Relay IPv6 Page, page 51-7.
Related Topics
• Add and Edit DHCP Relay IPv6 Agent Configuration Dialog Boxes, page 51-8
Field Reference
Configuring DHCP Servers
A Dynamic Host Configuration Protocol (DHCP) server provides network configuration parameters,
such as IP addresses, to DHCP clients. The security appliance can provide DHCP server or DHCP relay
services to DHCP clients attached to the security appliance interfaces. The DHCP server provides
network configuration parameters directly to DHCP clients: DHCP relay passes DHCP requests received
on one interface to an external DHCP server located behind a different interface. For more information
about DHCP relay, see DHCP Relay Page, page 51-5.
Note The security appliance DHCP server does not support BOOTP requests.
In multiple-context mode, you cannot enable a DHCP server or DHCP relay on an interface that is used
by more than one context.
You can configure a DHCP server on each interface of the security appliance, and each interface can have
its own pool of addresses to draw from. However, the other DHCP settings, such as DNS servers, domain
name, options, ping timeout, and WINS servers, are configured globally and used by the DHCP server
on all interfaces.
You cannot configure a DHCP client or DHCP relay services on an interface on which the DHCP server
is enabled. Additionally, DHCP clients must be directly connected to the interface on which the server
is enabled.
Table 51-8 Add and Edit DHCP Relay IPv6 Server Configuration Dialog Boxes
Element Description
Server Enter the IP address or Select a Networks/Hosts object representing the
external DHCPv6 server to which DHCPv6 requests are forwarded.
Interface Enter or Select the interface through which DHCPv6 requests are
forwarded to the external DHCPv6 server.