Note If a client requests an invalid or duplicate address for the network, a DHCP server can respond with a DHCP denial message ( DHCPNAK packet). At this stage, the DHCP client accepts a lease that any DHCP server has issued.
If the DHCP client fails to renew its lease the first time, then the DHCP client broadcasts a DHCPDISCOVER packet to update its address lease when 87.5 percent of the current lease duration expires. If the DHCP server is unavailable, the client continues to use its current configuration parameters. The client updates its configuration when it receives the acknowledgment. If the DHCP server is available, it renews the lease and sends the client a DHCPACK packet with the new lease duration and any updated configuration parameters.
To attempt a lease renewal, the DHCP client sends a DHCPREQUEST packet directly to the DHCP server from which the client obtained the lease. The DHCP client will also attempt to renew its IP address lease each time that the computer restarts. At specific intervals, a DHCP client attempts to renew its lease to ensure that it has up-to-date configuration information.Īt any time during the lease period, the DHCP client can send a DHCPRELEASE packet to the DHCP server to release the IP address configuration data and to cancel any remaining lease.Ī DHCP client automatically attempts to renew its lease as soon as 50 percent of the lease duration has expired. The client must renew its IP configuration data before the lease period expires. Having DHCP maintain this information means that you can manage IP addressing from the DHCP server. The lease period value ensures that DHCP maintains the IP address information and that clients regularly update or renew their IP address configuration data. The lease renewal process is the result of the lease period value. If the lease period expires and the DHCP client has not yet renewed its IP configuration data, then the DHCP client loses the IP configuration data and begins the DHCP lease generation process again. The DHCP client renews its IP configuration data prior to the expiration of the lease time. The DHCP lease renewal process is the process by which the DHCP client renews or updates its IP address configuration data with the DHCP server. Purpose of the DHCP lease renewal process DHCP client sends a DHCPREQUEST packet 2J DHCP Serverl sends a DHC PACK packet
for PCWAY automatic macro launch, and register the trigger device for automatically launching the registered macro as the weekly timer register.Network Services Windows 50% of lease duration has expired Register the monthly report processing macro of step 3. Notify PCWAY that the spreadsheet has been switchedĤ. Represent the displayed spreadsheet name as SheetSaveĬall Application.Run("PCWAYsubAutoSheet") Input 1 to cell "A1" (input 0 to switch off).ĭeclaration of the save area for the sheet name being displayedĭeclaration of the save area for today's date In this example, we will allocate the cell data settings to cell A1 (regarding allocation cell position, a cell position that hides the cell as much as possible is best).Ģ. In the spreadsheet "TEST", set the PCWAY cell data setting to set V0 of WRITE mode. Specify the spreedsheet as "TEST", and event as "V0".ġ. The following assumes that you want to perform the monthly report on the 1st day every month. PCWAY must be setup for continuous monitoring.ģ.The time for the monthly report processing must be established. The system must be capable of 24-hour operation.Ģ. If it does not satisfy these conditions, we recommend that you carry out the processing manually (by pressing the buttons in the Excel spreadsheet).ġ. In order to use PCWAY to process an automatic monthly report, your system must satisfy the following conditions.