3Com Switch 7750 Configuration Guide Guide

Displaying and Debugging a DHCP Server 573
Displaying and
Debugging a DHCP
Server
You can verify your DHCP-related configuration by executing the display
command in any view.
To clear the information about DHCP servers, execute the reset command in user
view.
n
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.
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
assigning is carried out through DHCP relay. Note that DHCP server configuration
is the same in both scenarios.
Table 448 Display and debug a DHCP server
Operation Command Description
Display the statistics on IP
address conflicts
display dhcp server conflict
{ all | ip ip-address }
The display command can be
executed in any view
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 }
Clear IP address conflict
statistics
reset dhcp server conflict {
all | ip ip-address }
The reset command can be
executed in user view
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