Configuring the DHCP Relay Agent

If a device belongs to an IRF fabric, you need to enable the UDP Helper function on it before configuring it as a DHCP relay agent.

DHCP Relay Agent Configuration Task List

Complete the following tasks to configure the DHCP relay agent:

Task

Remarks

Correlating a DHCP Server Group with a Relay Agent Interface

Required

 

 

Configuring DHCP Relay Agent Security Functions

Optional

 

 

Configuring the DHCP Relay Agent to Support Option 82

Optional

 

 

Correlating a DHCP Server Group with a Relay Agent Interface

To enhance reliability, you can set multiple DHCP servers on the same network. These DHCP servers form a DHCP server group. When an interface of the relay agent establishes a correlation with the DHCP server group, the interface will forward received DHCP packets to all servers in the server group.

Follow these steps to correlate a DHCP server group with a relay agent interface:

 

 

To do…

 

Use the command…

 

Remarks

 

 

Enter system view

 

system-view

 

 

 

 

 

 

 

 

 

 

Configure the DHCP server IP

 

 

 

Required

 

 

 

dhcp-server groupNo ip

 

By default, no DHCP server IP

 

 

address(es) in a specified

 

 

 

 

 

ip-address&<1-8>

 

address is configured in a

 

 

DHCP server group

 

 

 

 

 

 

 

DHCP server group.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

interface interface-type

 

Required

 

 

Map an interface to a DHCP

 

interface-number

 

By default, a VLAN interface is

 

 

server group

 

 

 

not mapped to any DHCP

 

 

 

dhcp-server groupNo

 

 

 

 

 

 

server group.

 

 

 

 

 

 

 

2-4

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3Com WX3000 Configuring the Dhcp Relay Agent, Dhcp Relay Agent Configuration Task List, Dhcp-server groupNo ip