Technical data

Configuring the DHCP Server
7.2 DHCP Server Components
7.2.5 Log Files
The DHCP server creates a log file named TCPIP$DHCP_RUN.LOG in the
directory SYS$SYSDEVICE:[TCPIP$DHCP].
7.3 DHCP Server Startup and Shutdown
The DHCP server can be shut down and started independently of TCP/IP
Services. This is useful when you change parameters or logical names that
require the service to be restarted.
The following files are provided:
• SYS$STARTUP:TCPIP$DHCP_STARTUP.COM allows you to start up the
DHCP service.
• SYS$STARTUP:TCPIP$DHCP_SHUTDOWN.COM allows you to shut down
the DHCP service.
To preserve site-specific parameter settings and commands, create the following
files. These files are not overwritten when you reinstall TCP/IP Services:
• SYS$STARTUP:TCPIP$DHCP_SYSTARTUP.COM can be used as a repository
for site-specific definitions and parameters to be invoked when DHCP is
started.
• SYS$STARTUP:TCPIP$DHCP_SYSHUTDOWN.COM can be used as a
repository for site-specific definitions and parameters to be invoked when
DHCP is shut down.
7.3.1 Stopping the DHCP Server Process
If you specified automatic startup during the TCP/IP Services configuration
procedure (TCPIP$CONFIG), the DHCP server process starts automatically when
the DHCP service is started (TCPIP$DHCP_STARTUP.COM).
If you want to stop the DHCP server process, enter the following utility command
as defined in SYS$MANAGER:TCPIP$DHCP_SETUPCOMMANDS.COM:
$ DHCPSIGTERM
Be aware that a new DHCP server process starts automatically as soon as the old
process exits unless you disable the DHCP service before entering a DHCPSIGTERM
command. As an alternative method, you can shut down DHCP by executing the
following command:
$ @SYS$STARTUP:TCPIP$DHCP_SHUTDOWN
Because the DHCP server has several binary databases open (updates to which
might not have been flushed to the disk), do not stop a running DHCP process
using the DCL command STOP/ID=entry_number. Instead, stop the DHCP
process by entering the DHCPSIGTERM command.
Configuring the DHCP Server 7–17