2-26z Once releasing a lease, the DHCP server sends an Accounting STOP packet to the RADIUSserver. The RADIUS server processes the packet, stops the recording for the DHCP client, andsends a response to the DHCP server. A lease can be released for the reasons such as leaseexpiration, a release request received from the DHCP client, a manual release operation, anaddress pool removal operation.If the RADIUS server of the specified domain is unreachable, the DHCP server sends up to threeAccounting START packets (including the first sending attempt) at regular intervals. If the three packetsbring no response from the RADIUS server, the DHCP server does not send Accounting STARTpackets any more.DHCP Accounting ConfigurationPrerequisitesBefore configuring DHCP accounting, make sure that:z The DHCP server is configured and operates properly. Address pools and lease time areconfigured.z DHCP clients are configured and DHCP service is enabled.z The network operates properly.Configuring DHCP AccountingFollow these steps to configure DHCP accounting:To do… Use the command… RemarksEnter system view system-view —Enter address pool view dhcp server ip-poolpool-name RequiredEnable DHCP accounting accounting domaindomain-nameRequiredThe domain identified by thedomain-name argument can becreated by using the domaincommand.Enabling the DHCP Server to Process Option 82If a DHCP server is enabled to process Option 82, after the DHCP server receives packets containingOption 82, the DHCP server adds Option 82 into the responses when assigning IP addresses and otherconfiguration information to the clients.If 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 addressesand other configuration information to the clients.For details of Option 82, see section Option 82 Support on DHCP Relay Agent.
