H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – DHCP
H3C S7500 Series Ethernet Switches Chapter 2
DHCP Server Configuration
2-18
2.5 Displaying and Maintaining a DHCP Server
To do… Use the command… Remarks
Display the statistics on IP
address conflicts
display dhcp server conflict { all | ip
ip-address }
Display lease expiration
information
display dhcp server expired { ip
ip-address | pool [ pool-name ] | interface
[ interface-type interface-number ] all }
Display the free IP
addresses
display dhcp server free-ip
Display information about
address binding
display dhcp server ip-in-use { ip
ip-address | pool [ pool-name ] | interface
[ interface-type interface-number ] all }
Display the statistics on a
DHCP server
display dhcp server statistics
Display information about
DHCP address pool tree
display dhcp server tree { pool
[ pool-name ] | interface [ interface-type
interface-number ] | all }
Available
in any
view
Clear IP address conflict
statistics
reset dhcp server conflict { all | ip
ip-address }
Clear dynamic address
binding information
reset dhcp server ip-in-use { ip
ip-address | pool [ pool-name ] | interface
[ interface-type interface-number ] | all }
Clear the statistics on a
DHCP server
reset dhcp server statistics
Available
in user
view
 Note:
Executing the save command will not save the lease information on a DHCP server to
the flash memory. Therefore, the configuration file contains no lease information after
the DHCP server restarts or you clear the lease information by executing the reset
dhcp server ip-in-use command. In this case, any lease-update requests will be
denied, and the clients must apply for IP addresses again.
2.6 DHCP Server Configuration Example
Currently, DHCP networking can be implemented in two ways. One is to deploy the
DHCP server and DHCP clients in the same network segment. This enables the
clients to communicate with the server directly. The other is to deploy the DHCP
server and DHCP clients in different network segments. In this case, IP address