111• If the server receives a response within the specified period, it selects and pings another IPaddress.• If it receives no response, the server continues to ping the IP address until the maximumnumber of ping packets are sent. If still no response is received, the server assigns the IPaddress to the requesting client. The DHCP client uses gratuitous ARP to perform IP addressconflict detection.To configure IP address conflict detection:Step Command Remarks1. Enter system view. system-view N/A2. (Optional.) Set the maximumnumber of ping packets to besent for conflict detection.dhcp server ping packetsnumberThe default setting is one.The value 0 disables IP addressconflict detection.3. (Optional.) Set the pingtimeout time.dhcp server ping timeoutmillisecondsThe default setting is 500 ms.The value 0 disables IP addressconflict detection.Enabling handling of Option 82Perform this task to enable the DHCP server to handle Option 82. Upon receiving a DHCP requestthat contains Option 82, the DHCP server adds Option 82 into the DHCP response.If you disable the DHCP to handle Option 82, it does not add Option 82 into the response message.You must enable handling of Option 82 on both the DHCP server and the DHCP relay agent toensure correct processing for Option 82. For information about enabling handling of Option 82 on theDHCP relay agent, see "Configuring Option 82."To enable the DHCP server to handle Option 82:Step Command Remarks1. Enter system view. system-view N/A2. Enable the server to handleOption 82.dhcp server relay informationenableBy default, handling ofOption 82 is enabled.Disabling Option 60 encapsulation in DHCPrepliesIf one or more DHCP clients cannot resolve Option 60, disable the DHCP server from encapsulatingOption 60 in DHCP replies. If you do not disable the capability, the DHCP server encapsulatesOption 60 in a DHCP reply in the following situations:• The received DHCP packet contains Option 60.• Option 60 is configured for the address pool.To disable the DHCP server from encapsulating Option 60 in DHCP replies:Step Command Remarks1. Enter system view. system-view N/A
