2-25If a DHCP server is configured to ignore Option 82, after the DHCP server receives packets containingOption 82, the DHCP server will not add Option 82 into the responses when assigning IP addresses andother configuration information to the clients.Follow these steps to configure the DHCP server to process Option 82:To do… Use the command… RemarksEnter system view system-view —Enable the DHCP server toprocess Option 82dhcp server relayinformation enableOptionalBy default, the DHCP serversupports Option 82.Displaying and Maintaining the DHCP ServerTo do… Use the command… RemarksDisplay the statistics on IPaddress conflictsdisplay dhcp server conflict { all | ipip-address }Display lease expirationinformationdisplay dhcp server expired { ip ip-address |pool [ pool-name ] | interface [ interface-typeinterface-number ] | all }Display the free IP addresses display dhcp server free-ipDisplay information aboutaddress bindingdisplay dhcp server ip-in-use { ip ip-address |pool [ pool-name ] | interface [ interface-typeinterface-number ] | all }Display the statistics on aDHCP server display dhcp server statisticsDisplay information aboutDHCP address pool treedisplay dhcp server tree { pool [ pool-name ] |interface [ interface-type interface-number ] |all }Available inany viewClear IP address conflictstatistics reset dhcp server conflict { all | ip ip-address }Clear dynamic address bindinginformationreset dhcp server ip-in-use { ip ip-address |pool [ pool-name ] | interface [ interface-typeinterface-number ] | all }Clear the statistics on a DHCPserver reset dhcp server statisticsAvailable inuser viewExecuting 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 youclear the lease information by executing the reset dhcp server ip-in-use command. In this case, anylease-update requests will be denied, and the clients must apply for IP addresses again.
