The DHCP server issues and leases dynamic IP addresses to clients on a network. It assigns IP addresses from a defined address pool for a predetermined lease duration, such as days for laptops and weeks for desktops. The DHCP server can reserve addresses for certain clients based on their MAC addresses or host names and restrict leases to clients with known MAC addresses for security. It is installed through the server management wizard and configured by specifying the address range, exclusions, lease duration, DNS settings, and reservations.

1. DHCP Server
© N. Ganesan, Ph.D.

2. Reference

3. DHCP Server
• Issues or leases dynamic IP addresses to
clients in a network
• The lease can be subject to various
conditions
– Duration
– Computer ID etc.

4. IP Address Assignment
• The DHCP server assigns or leases a client an
IP address for a predetermined period of time
– In most cases, the IP address is automatically
renewed when a clients logs into a network
• The IP address assigned is taken from a pool
of IP addresses defined as the scope of IP
addresses available for assignment
• A user can manually release and renew an IP
address by typing the commands "ipconfig
/release", followed by "ipconfig /renew" in
the command prompt

5. Assignment Conditions
• IP addresses can be reserved for clients
based on MAC addresses and host
names
• For security, the lease of IP addresses
can be restricted to clients with known
MAC addresses

6. DHCP Server in a Network

7. Initiating the Installation of the
DHCP Server
• User the Manage Your Server wizard
and select the DHCP server option for
installation

8. Name and Description of the
DHCP Server

9. Address Range and Subnet Mask
Specification

10. IP Address Exclusions

11. Exclusions
• Some IP addresses may be excluded so that
they could be reserved for assignment to
servers as static addresses
– Servers, in general, requires the assignment of
static addresses
– The router address is also normally excluded
• Specific or a range of IP addresses may be
excluded in this manner

12. Lease Duration

13. Guideline on Lease Duration
• Shorter leases for mobile devices such
as laptops
• Longer leases for permanent devices
such as desktops

14. Configuration of DHCP Options

15. Default Gateway Address

16. Domain Name and DNS Server
Address

17. DNS Specification
• DNS IP address can be specified
manually
• DNS IP address can also be resolved by
entering the server name and pressing
the “resolve” button on the screen

18. WIN Servers

19. Scope Activation

20. Further Configuration of DHCP

21. Further Exclusions

22. Exclusive IP Address Reservation
for Clients

23. Reservation Basis
• Reservations are based on MAC
addresses

24. The End