Technical data

66 CHAPTER 4: NETWORK PROTOCOL OPERATION
Configuring the Address Table Entry
To check the address of users who have valid and fixed IP addresses in the VLAN
(with DHCP enabled), it is necessary to add an entry in the static address table.
Perform the following configuration in system view.
Enabling/Disabling DHCP Security Features
Enabling DHCP security features starts an address check on the VLAN interface,
while disabling DHCP security features cancels an address check.
Perform the following configuration in VLAN interface view.
By default, DHCP security features function are disabled.
Displaying and Debugging DHCP Relay
Execute display command in all views to display the current DHCP Relay
configuration, and to verify the effect of the configuration. Execute the
debugging command in user view to debug DHCP Relay configuration.
Example: Configuring
DHCP Relay
Configure the VLAN interface corresponding to the user and the related DHCP
server so as to use DHCP relay.
Tab le 10 Configure/Delete the Address Table Entry
Operation Command
Add an entry to the address table dhcp-security static ip_address mac_address
{ dynamic | static }
Delete an entry from the address table undo dhcp-security { ip_address | all |
dynamic | static }
Tab le 11 Enable/Disable DHCP Security on VLAN Interfaces
Operation Command
Enable DHCP security features address-check enable
Disable DHCP security features on VLAN
interface
address-check disable
Tab le 12 Displaying and Debugging DHCP Relay
Operation Command
Display the information about the DHCP
server group
display dhcp-server groupNo
Display the information about the DHCP
server group corresponding to the VLAN
interface.
display dhcp-server interface
vlan-interface vlan-id
Enable DHCP relay debugging debugging dhcp-relay
Disable DHCP relay debugging undo debugging dhcp-relay
Display address information for all the legal
clients of the DHCP Server group.
display dhcp-security [ ip_address |
dynamic | static ]