Display And Debug Dhcp - Huawei Quidway S3500 Series Operation Manual

Operation Manual - Network Protocol
Quidway S3500 Series Ethernet Switches
This configuration takes effect only when the DHCP security feature is enabled on the
VLAN interface.
5.4.7 Allow/Inhibit the Passing of Unknown Machines through DHCP
Security Check
The so called unknown machine is a device which IP and MAC addresses are not
contained in any DHCP security table entry. When unknown machines are inhibited
from passing through the DHCP security check, they cannot access the network even
through they have a legal IP address.
Perform the following configuration in VLAN interface view.
Table 5-37 Allow/inhibit the passing of unknown machines through the DHCP security
check
Inhibit unknown machines from passing
through the DHCP security check
Allow unknown machines to pass through
the DHCP security check
By default, unknown machines are inhibited from passing through the DHCP security
check.
This configuration takes effect only when the DHCP security feature is enabled on the
VLAN interface.

5.5 Display and Debug DHCP

After the above configuration, execute display command in any view to display the
running of the DHCP configuration, and to verify the effect of the configuration. Execute
reset command to reset DHCP related information and debugging command to debug
DHCP.
Table 5-38 Display and debug DHCP
View available addresses in
DHCP address pools
View information of DHCP
address conflicts
View expired leases in DHCP
address pools
Operation
Operation
Huawei Technologies Proprietary
address-check no-matched enable
address-check no-matched disable
Command
display dhcp server free-ip
display dhcp server conflict { all | ip ip-address }
display dhcp server expired { ip ip-address |
pool [ pool-name ] | interface [ vlan-interface
vlan_id ] | all }
5-23
Chapter 5 DHCP Configuration
Command