Dhcp Server - D-Link DES-3528 - xStack Switch - Stackable Reference Manual

xStack® DES-3528/DES-3552 Series Layer 2 Stackable Fast Ethernet Managed Switch Web UI Reference Guide
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DHCP Server

For this release, the Switch now has the capability to act as a DHCP server to devices within its locally attached
network. 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.
To begin configuring the Switch as a DHCP Server, open the L3 Features folder, then the DHCP Server folder, which
will display five links to aid the user in configuring the DHCP server.
DHCP Server Global Settings
The following window will allow users to globally enable the Switch as a DHCP server and set the DHCP Ping Settings
to test connectivity between the DHCP Server and Client.
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.
Figure 9-9 DHCP Server Global Settings window
Description
Click the radio buttons to enable or disable the Switch as a DHCP server.
Enter a number between 0 and 10 to denote the number of ping packets 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. The default setting is 2 packets.
The user may set a time between 10 and 2000 milliseconds that the Switch will wait
before timing out a ping packet. The default setting is 100 milliseconds.
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