Configuring dhcp options, Options that return an ip address, Options that return a text string – Cisco ASA 5505 User Manual

Page 350

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11-4

Cisco ASA 5500 Series Configuration Guide using the CLI

Chapter 11 Configuring DHCP

Configuring a DHCP Server

Configuring DHCP Options

You can configure the ASA to send information for the DHCP options listed in RFC 2132. The DHCP
options include the following three categories:

Options that Return an IP Address, page 11-4

Options that Return a Text String, page 11-4

Options that Return a Hexadecimal Value, page 11-5

The ASA supports all three categories. To configure a DHCP option, choose one of the following
commands:

Options that Return an IP Address

Options that Return a Text String

Step 7

dhcpd option 3 ip

gateway_ip

Example:

hostname(config)# dhcpd option 3 ip

10.10.1.1

Defines a default gateway that is sent to DHCP clients. If you do
not use the dhcpd option 3 command to define the default
gateway, DHCP clients use the IP address of the management
interface. As a result, the DHCP ACK does not include this
option. The management interface does not route traffic.

Step 8

dhcpd enable

interface_name

Example:

hostname(config)# dhcpd enable outside

Enables the DHCP daemon within the ASA to listen for DHCP
client requests on the enabled interface.

Command

Purpose

Command

Purpose

dhcpd option

code ip addr_1 [addr_2]

Example:

hostname(config)# dhcpd option 2 ip

10.10.1.1 10.10.1.2

Configures a DHCP option that returns one or two IP addresses.

Command

Purpose

dhcpd option

code ascii text

Example:

hostname(config)# dhcpd option 2 ascii

examplestring

Configures a DHCP option that returns a text string.

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