Configuring The Dhcp Relay Agent - H3C S7500E Series Operation Manual

Operation Manual – DHCP
H3C S7500E Series Ethernet Switches
If the DHCP relay agent supports Option 82, it will handle a client's request according to
the contents defined in Option 82, if any. The handling strategies are described in the
table below.
If a reply returned by the DHCP server contains Option 82, the DHCP relay agent will
remove the Option 82 before forwarding the reply to the client.
If a client's
requesting
message has...
Option 82
no Option 82
3.2 Configuration Task List
Complete the following tasks to configure the DHCP relay agent:
Enabling DHCP
Enabling the DHCP Relay Agent on an Interface
Correlating a DHCP Server Group with a Relay Agent Interface
Configuring the DHCP Relay Agent to Send a DHCP-Release
Request
Configuring the DHCP Relay Agent Security Functions
Configuring the DHCP Relay Agent to Support Option 82

3.3 Configuring the DHCP Relay Agent

3.3.1 Enabling DHCP
Enable DHCP before performing other DHCP-related configurations.
Handling Padding
strategy format
Drop Random
Keep Random
normal
Replace
verbose
normal
—
verbose
—
Task
3-3
Chapter 3 DHCP Relay Agent Configuration
The DHCP relay agent will...
Drop the message.
Forward the message without
changing Option 82.
Forward the message after replacing
the original Option 82 with the Option
82 padded in normal format.
Forward the message after replacing
the original Option 82 with the Option
82 padded in verbose format.
Forward the message after adding the
Option 82 padded in normal format.
Forward the message after adding the
Option 82 padded in verbose format.
Remarks
Required
Required
Required
Optional
Optional
Optional