Technical data

Configuring the DHCP Client
8.3 DHCP Client Startup and Shutdown
8.3 DHCP Client Startup and Shutdown
The DHCP client 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_CLIENT_STARTUP.COM allows you to start
up the DHCP client service.
• SYS$STARTUP:TCPIP$DHCP_CLIENT_SHUTDOWN.COM allows you to
shut down the DHCP client 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_CLIENT_SYSTARTUP.COM can be used as
a repository for site-specific definitions and parameters to be invoked when
DHCP client is started.
• SYS$STARTUP:TCPIP$DHCP_CLIENT_SYSHUTDOWN.COM can be used
as a repository for site-specific definitions and parameters to be invoked when
DHCP client is shut down.
8.4 Configuring the DHCP Client
In order for the DHCP client to run, you must perform the following steps:
1. Put at least one interface under DHCP control.
2. Configure the DHCP client software.
8.4.1 Putting Interfaces under DHCP Control
For the DHCP client to execute, at least one interface on your host must be
designated as being under DHCP control. This means that the interface IP
address, subnet mask, and broadcast address are set automatically by DHCP
when the system invokes the command procedure TCPIP$STARTUP.COM.
To place interfaces under DHCP control, you have these options:
• Use DHCP client autoconfigure for new TCP/IP Services installations.
• Use TCPIP$CONFIG to put interfaces under DHCP control.
8.4.1.1 Using Autoconfigure on a New TCP/IP Installation
If you have never installed a previous version of UCX or TCP/IP Services,
you may simply install TCP/IP Services and manually invoke the
SYS$STARTUP:TCPIP$STARTUP.COM procedure. TCPIP$STARTUP.COM
detects that you have never run TCPIP$CONFIG and asks whether you
want DHCP client to configure your host for you. If you answer Yes,
TCPIP$STARTUP.COM invokes TCPIP$CONFIG to configure a small set of
services and sets any unconfigured interfaces to be under DHCP control. This
process is done in silent mode and asks you no questions.
The services enabled when you autoconfigure are:
• FTP client
• TELNET client
• TELNET server
8–12 Configuring the DHCP Client