Dhcp Relay Security Address-Check - Huawei quidway s3526 series Getting Started

Command Manual - Network Protocol
Quidway S3500 Series Ethernet Switches
View
VLAN interface view, system view
Parameter
client-ip: IP address of DHCP client.
mac-address: MAC address of DHCP client.
server-ip: IP address of DHCP server.
Description
Using the dhcp relay release command, you can send an IP address release request
to a DHCP server by using DHCP relay.
When no DHCP server is specified, the DHCP relay in system view sends release
requests to all the DHCP servers but in VLAN interface view only to the DHCP servers
on the VLAN interface.
After receiving an IP address release request from the DHCP relay, the DHCP server
releases the IP address from the IP-in-use address pool and moves it to the
lease-expired queue. Normally, this address will experience some time before
participating in allocation again. For the client, however, this address is not released
and will be used until its lease really expires.
Example
# Request the DHCP server at 10.110.91.174 to release the IP address 192.2.2.25
assigned to the client with the MAC address 0050-ba34-2000.
[Quidway] dhcp relay release 192.2.2.25 0050-ba34-2000 10.110.91.174

6.3.5 dhcp relay security address-check

Syntax
dhcp relay security address-check enable
dhcp relay security address-check disable
View
VLAN interface view
Parameter
None
Description
Using the dhcp relay security address-check enable command, you can enable the
security feature of DHCP relay to check the validity of user addresses on the VLAN
Huawei Technologies Proprietary
6-32
Chapter 6 DHCP Configuration Commands