Switch 7700 Configuration Guide

DHCP Relay 53
Configure Corresponding DHCP Server Group of the VLAN Interface
Perform the following configuration in VLAN interface view.
When associating a VLAN interface to a new DHCP server group, you can
configure the association without disassociating it from the previous group.
No VLAN interface corresponds to a DHCP server group, by default.
Configure 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.
Enable DHCP Security Features
Enable DHCP security features will start address check on VLAN interface while
disable DHCP security features will cancel address check.
Perform the following configuration in VLAN interface view.
Displaying and
Debugging DHCP Relay
After the above configuration, execute display command in all views to display the
running of the DHCP Relay configuration, and to verify the effect of the
configuration. Execute debugging command in user view to debug DHCP Relay
configuration.
Tabl e 7 Configure/Delete the Corresponding DHCP Server Group of VLAN Interface
Operation Command
Configure Corresponding DHCP
Server Group of the VLAN Interface
dhcp-server groupNo
Delete the corresponding DHCP
server group of the VLAN interface
undo dhcp-server
Tabl e 8 Configure/Delete the Address Table Entry
Operation Command
Add an entry to the address table dhcp-security ip_address mac_address { dynamic |
static }
Delete an entry from the address
table
undo dhcp-security ip_address
Tabl e 9 Enable/Disable DHCP Security on VLAN Interfaces
Operation Command
Enable DHCP security features enable address-check
Disable DHCP security features on
VLAN interface
disable address-check
Tabl e 10 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 { interface_type
interface_num | interface_name }