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170 Operation

Chapter 5 - Command Line Interface

5.8 DHCP Relay Commands

Dynamic Host Configuration Protocol (DHCP) can dynamically allocate an IP

address and other configuration information to network clients that broadcast a

request. To receive the broadcast request, the DHCP server would normally have

to be on the same subnet as the client. However, when the AP’s DHCP relay agent

is enabled, received client requests can be forwarded directly by the AP to a known

DHCP server on another subnet. Responses from the DHCP server are returned to

the AP, which then broadcasts them back to clients.

5.8.1 dhcp-relay enable

This command enables the AP’s DHCP relay agent. Use the no form to disable the

agent.

Syntax

[no] dhcp-relay enable

Default Setting

Disabled

Command Mode

Global Configuration

Command Usage

• For the DHCP relay agent to function, the primary DHCP server must be configured using the

dhcp-relay primary command. A secondary DHCP server does not need to be configured, but it is

recommended.

• If there is no response from the primary DHCP server, and a secondary server has been configured,

the agent will then attempt to send DHCP requests to the secondary server.

Example

5.8.2 dhcp-relay

This command configures the primary and secondary DHCP server addresses.

Table 5-9: DHCP Relay Commands

Command Function Mode Page

dhcp-relay enable Enables the DHCP relay agent GC 170

dhcp-relay Sets the primary and secondary DHCP server address GC 170

show dhcp-relay Shows current DHCP relay configuration settings Exec 171

Enterprise AP(config)#dhcp-relay enable

Enterprise AP(config)#

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