TCP/IP has become for more and more installations the
protocol, also pushed by the explosive growth of the Internet,
based on TCP/IP.
When using a network with only Windows95 and WindowsNT4 based systems,
you will have to assigned the IP-addresses manually (Windows98
IP-Auto-Configuration system), but more and more server-systems offer the
automatic assignment of IP-addresses via:
DHCP (Dynamic Host
The installation of the DHCP-server on Windows
NT4 server (the DHCP-server
is NOT included in Windows NT4 workstation ) is very simple:
||In the Network-configuration,
tab: Services, click on "Add"
and then select:
"Microsoft DHCP Server"
The following notice will be displayed:
The system running the DHCP-server (distributing
IP-addresses to other systems)
itself MUST use a static IP-address (manually assigned) , it can
to receive an IP-address from any DHCP-server (itself or another
Like after all changes to the network configuration, you have to
Configuration of the DHCP-server
||Although the DHCP-server is listed
as a Networking service, it is NOT
configured from the Network applet
(the Properties button is grayed out)
||The "DHCP - Manager"
added to the menu for the
||You need to define now a range of
to be distributed.
This range is called: "Scope".
To be able to define Scope, click first on the
entry "Local Machine"
to expand the entry,
the "+" -sign needs to change to the
||Only then you are able to select from
menu: "Scope" the
You assign the range of IP-addresses to be assigned by
( in the example: all IP-addresses between
18.104.22.168 and 22.214.171.124):
usually, an IP-address is NOT assigned permanently, but only for
time, called the "Lease Duration".
On selected the "OK"-button, you will be asked on
whether to activate
the scope, select "Yes":
||The yellow light-bulb indicates, that
the scope is now active and that the
DHCP-server is ready to assign the
||To display the IP-range
viewing/editing, select from the menu
"Scope" the option "Properties"
Setting up a connected Windows systems to use
the DHCP-server is very simple:
||In the Network-configuration,
select the properties for the
TCP/IP-protocol and just make
sure, that it defines to
"obtain an IP address automatically"
To verify the assigned IP-address on a Windows95/98 system, run
"WINIPCFG" program (usually from
the RUN-menu)(On Windows NT, use IPCONFIG):
In this example, DHCP assigned the IP-address 126.96.36.199.
But there is no "Default gateway" defined !
TCP/IP requires more than
just the IP-address, for communication outside
the local network-cable (the local "subnet"), it needs
to know the IP-address
of the Gateway
(also called Router).
DHCP can be configured to provide also this information to the
||make sure, that your Scope is selected
(highlighted in blue), then select from the
menu: "DHCP Options", then "Scope"
||From the list of
"Unused Options", select
"Router", then use the
||Once the "Router" is
an "Active Option",
click on the button
"Value" to define the
IP-address for the Router.
||On the expanded Windows,
click on "Edit Array",
allowing then to enter
the IP-address of the
Router, then select the
"Add"-button to get the
new values displayed in
the list of IP-addresses.
Press "OK" to exit this
||The IP-address of the
Router is displayed.
Press "OK" to close the
||The DHCP-Mananger is now displayed
for the scope also the option for the
When now checking on Windows95/98 with
the IP-address for the "Default Gateway" is defined.
If your configuration requires the use of WINS, it can be also
as an option of the DHCP-server.
DHCP can also be used to assigned IP-addresses
for incoming RAS-
||To view the list of IP-address already
assigned, select from the menu: "Scope"
the option "Active Leases"
||In this example, 188.8.131.52 is assign
to a LAN user, while 184.108.40.206
is assigned to the Modem to handle
incoming RAS TCP/IP-connections.