D-Link DRO-210i - Manual (Page 18)

DHCP, DNS and Time
Dlink DRO-210i User Guide 18
3 DHCP, DNS and Time
3.1
DHCP
DHCP (Dynamic Host Configuration Protocol) is a method of automatically assigning IP
address, subnet mask, default gateway and DNS server IP address to hosts on the LAN.
This router provides an in-built DHCP Server. In addition, a DHCP Relay is available to
relay the DHCP Requests to a DHCP Server on another port.
3.1.1 DHCP Server
The DHCP server assigns and manages IP addresses from a specified address pool to
DHCP clients. When a DHCP server receives a request from a DHCP client, it returns the
configuration parameters (such as an IP address, a MAC address, a domain name, and a
lease for the IP address) to the client in a unicast message format. Because the DHCP
server maintains all the configurations parameters, an administrator only needs to update
the central DHCP Server when any configuration parameter is to be changed.
Compared to the static assignment where the client owns the address, dynamic addressing
by the DHCP server leases the address to each client for a defined period of time. During
the life cycle of the lease, the client is guaranteed to have a unique IP address that can last
for the entire period. If the client needs to renew the lease from the server it can do so
before the expiration of the lease. The client may also decide at any time that it no longer
wishes to use the IP address it was assigned, and may terminate the lease by releasing the
IP address. The administrator can configure this lease time in the DHCP server.
Note: The DHCP Server can assign up to 253 IP Addresses to the LAN Clients. For
example, if the router IP address is 192.168.100.254, the DHCP Server can assign IP
Addresses from 192.168.100.1 to 192.168.100.253. Please note that the addresses
ending in 0 and 255 are reserved for other uses.
Select Misc →
→ → → DHCP →
→ → → DHCP Server to configure DHCP Server as explained below.
DHCP Server
DHCP Server Status Select Enable or Disable option to activate or deactivate the DHCP Server
feature on the router (default value is Enable).
Starting IP address Enter the starting IP address from the range of IP address assigned to the
DHCP Server.
Ending IP address Enter the ending IP address from the range of IP address assigned to the
DHCP Server.
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