Dhcp Server - D-Link DGS-3000 Series Reference Manual

DHCP Server

DHCP, or Dynamic Host Configuration Protocol, allows the switch to delegate IP addresses, subnet masks, default
gateways and other IP parameters to devices that request this information. This occurs when a DHCP enabled device
is booted on or attached to the locally attached network. This device is known as the DHCP client and when enabled,
it will emit query messages on the network before any IP parameters are set. When the DHCP server receives this
request, it returns a response to the client, containing the previously mentioned IP information that the DHCP client
then utilizes and sets on its local configurations.
The user can configure many DHCP related parameters that it will utilize on its locally attached network, to control and
limit the IP settings of clients desiring an automatic IP configuration, such as the lease time of the allotted IP address,
the range of IP addresses that will be allowed in its DHCP pool, the ability to exclude various IP addresses within the
pool so as not to make identical entries on its network, or to assign the IP address of an important device (such as a
DNS server or the IP address of the default route) to another device on the network.
Users also have the ability to bind IP addresses within the DHCP pool to specific MAC addresses in order to keep
consistent the IP addresses of devices that may be important to the upkeep of the network that require a static IP
address.
DHCP Server Global Settings
This window is used to configure the DHCP server global parameters.
NOTE: The DHCP server's global state must be disabled and re-enabled for any modifications done to
take effect.
To view this window, click Network Application > DHCP > DHCP Server > DHCP Server Global Settings as shown
below:
The fields that can be configured are described below:
Parameter
DHCP Server State
Ping Packets (0-10)
Ping Timeout (10-
2000)
Click the Apply button to accept the changes made for each individual section.
DHCP Server Exclude Address Settings
The DHCP server assumes that all IP addresses in a DHCP pool subnet are available for assigning to DHCP clients.
You must use this page to specify the IP address that the DHCP server should not assign to clients. This command
can be used multiple times in order to define multiple groups of excluded addresses.
DGS-3000 Series Gigabit Ethernet Switch Web UI Reference Guide
Figure 9-9 DHCP Server Global Settings window
Description
Click the radio buttons to enable or disable the DHCP Server State.
Enter the numbers of ping packet that the Switch will send out on the network containing
the IP address to be allotted. If the ping request is not returned, the IP address is
considered unique to the local network and then allotted to the requesting client. 0 means
there is no ping test. The default value is 2.
Enter the amount of time the DHCP server must waits before timing out a ping packet.
The default value is 100.
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