H3C Technologies H3C S12500-X Series Switches - Manual (Page 55)

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Displaying and maintaining the DHCP server
IMPORTANT:
A restart of the DHCP server or execution of the reset dhcp server ip-in-use command deletes all lease
information. The DHCP server denies any DHCP request for lease extension, and the client must request an
IP address again.
Execute display commands in any view and reset commands in user view.
Task Command
Display information about IP address conflicts. display dhcp server conflict [ ip ip-address ]
Display information about lease-expired IP
addresses.
display dhcp server expired [ ip ip-address | pool pool-name ]
Display information about assignable IP
addresses.
display dhcp server free-ip [ pool pool-name ]
Display information about assigned IP
addresses. display dhcp server ip-in-use [ ip ip-address | pool
pool-name ]
Display DHCP server statistics. display dhcp server statistics [ pool pool-name ]
Display information about DHCP address
pools.
display dhcp server pool [ pool-name ]
Clear information about IP address conflicts. reset dhcp server conflict [ ip ip-address ]
Clear information about lease-expired IP
addresses.
reset dhcp server expired [ ip ip-address | pool pool-name ]
Clear information about assigned IP
addresses.
reset dhcp server ip-in-use [ ip ip-address | pool pool-name ]
Clear DHCP server statistics. reset dhcp server statistics
DHCP server configuration examples
DHCP networking involves the following types:
• The DHCP server and clients reside on the same subnet and exchange messages directly.
• The DHCP server and clients are not on the same subnet and they communicate with each other
through a DHCP relay agent.
The DHCP server configuration for the two types is identical.
Static IP address assignment configuration example
Network requirements
As shown in Figure 16 , Switch B (DHCP client) obtains the IP address, DNS server address, and gateway
address from Switch A (DHCP server).
The client ID of VLAN-interface 2 on Switch B is: