H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 308)

31-4
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
address(es) in a specified DHCP
server group
dhcp-server groupNo ip
ip-address &<1-8>
Required
By default, no DHCP server IP
address is configured in a DHCP
server group.
interface interface-type
interface-number Map an interface to a DHCP server
group
dhcp-server groupNo
Required
By default, a VLAN interface is not
mapped to any DHCP server
group.