Configuring The Dhcp Relay Agent; Dhcp Relay Agent Configuration Task List; Enabling Dhcp - H3C S5600 Series Operation Manual

Operation Manual – DHCP
H3C S5600 Series Ethernet Switches
Note:
Request packets sent by a DHCP client fall into two categories: DHCP-DISCOVER
packets and DHCP-REQUEST packets. As DHCP servers coming from different
manufacturers process DHCP request packets in different ways (that is, some DHCP
servers process Option 82 in DHCP-DISCOVER packets, whereas the rest process
Option 82 in DHCP-REQUEST packets), a DHCP relay agent adds Option 82 to both
types of packets to accommodate to DHCP servers of different manufacturers.

3.2 Configuring the DHCP Relay Agent

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

3.2.1 DHCP Relay Agent Configuration Task List

Complete the following tasks to configure the DHCP relay agent:

Enabling DHCP

Correlating a DHCP Server Group with a Relay Agent Interface
Configuring DHCP Relay Agent Security Functions
Configuring the DHCP Relay Agent to Support Option 82
3.2.2 Enabling DHCP
Make sure to enable DHCP before you perform other DHCP relay-related
configurations, since other DHCP-related configurations cannot take effect with DHCP
disabled.
Follow these steps to enable DHCP:
Chapter 3 DHCP Relay Agent Configuration
Task
3-4
Remarks
Required
Required
Optional
Optional