Configuring Dhcp Inform Message Handling Feature Used In Irf System; Displaying And Maintaining Dhcp Relay Agent Configuration - H3C S5600 Series Operation Manual

By default, with the Option 82 support function enabled on the DHCP relay agent, the DHCP relay
agent will adopt the replace strategy to process the request packets containing Option 82. However,
if other strategies are configured before, then enabling the 82 support on the DHCP relay agent will
not change the configured strategies.
To enable Option 82, you need to perform the corresponding configuration on the DHCP server
and the DHCP relay agent.
Configuring DHCP Inform Message Handling Feature Used in IRF
System
Follow these steps to enable the DHCP relay agent to replace the XID in DHCP Inform messages:
To do...
Enter system view
Enable UDP Helper
Enable the DHCP relay agent to
replace the XID in DHCP Inform
messages
Before enabling the DHCP relay agent to replace the XID in DHCP Inform messages, make sure that
UDP Helper is enabled on the switch.

Displaying and Maintaining DHCP Relay Agent Configuration

To do...
Display the information about a
specified DHCP server group
Display the information about the
DHCP server group to which a
specified VLAN interface is
mapped
Display the specified client address
entries on the DHCP relay agent
Clear the statistics information of
the specified DHCP server group
Use the command...
system-view
udp-helper enable
dhcp relay inform replace
enable
Use the command...
display dhcp-server groupNo
display dhcp-server interface
vlan-interface vlan-id
display dhcp-security
[ ip-address | dynamic | static |
tracker ]
reset dhcp-server groupNo
3-9
Remarks
—
Required
Disabled by default.
Optional
Enabled by default.
Remarks
Available in any view
Available in user view