User's Manual for
PLANET ISDN Router Product
IRT-401
Chapter 7. IRT-401 Configuration ¡V DHCP
Server
This chapter provides you with information on how to
automatically assign the workstations on your network with IP addresses as well as supply
DNS and Gateway information.
Topics covered:
Setting up the DHCP server.
Setting up the DHCP
Server
The IRT-401 is supplied with a 16 user
built-in DHCP server, which can be used to dynamically assign your workstations with an IP
address. If you are already running a DHCP Server (e.g. NT Server), there is no need to
utilities this function. However, it is ideal for small peer to peer networks running
Windows 95, 98 or NT Workstation.
To set-up the DHCP Server, follow the
instructions below.
- Run the NMS software and login to the router.
- Click on the Local tab and then DHCP.

Figure 7-1. The DHCP menu
- You will need to enter an IP Pool range (the Start and End
address is required). This is the range of addresses in which an IP can be assigned to a
workstation. An example would be a pool range from 192.168.0.2 to 18 allowing a possible
maximum of 16 workstations to be assigned IP's. If you already have a network you can use
your current IP address range, otherwise a private C-Class network range will do.
A subnet mask must also be supplied for the
IP pool range.
- Lease duration is the allotted time an IP address is valid
for a particular workstation.
- If you have Internet Access set-up, you must enter the
Primary and Secondary DNS Search numbers under the IP Configuration section.
- The Gateway Address MUST be the router's IP address, which is outside of the IP Address Pool (e.g. for this
example the router would be given 192.168.0.1 or >18).
- A Domain Name can be entered for your network but is
optional.
- Click 'Update' to save the settings and 'Refresh' to ensure
that the data is correct.
- To enable the DHCP Server, click the check box labeled 'DHCP
Enable', and select "Update" if not asked to reboot the router.
The DHCP configuration is now complete, you
must now change your workstation's
network set-up to use the DHCP Server.

Figure 7-2. Obtain IP address for DHCP
- Open Control Panel/Network/TCP-IP Properties for your
network card. Under the IP Address tab, click the 'Obtain an IP Address from a DHCP
Server' button and then 'OK'. You may be asked to reboot your machine.
- Repeat step 10 for every machine on your network utilising
the DHCP server.
- To check that you that have been assigned an IP address and
subnet mask, run either 'WINIPCFG' in Windows 95/98 or 'IPCONFIG' in Windows NT to verify
successful assignment.
Copyright (C) 1999 PLANET Technlogy
Corporation