D-Link DMS-3130 User Manual - Page 67

DMS-3130 Series Multi-Gigabit L3 Stackable Managed Switch Web UI Reference Guide DHCP Server The Dynamic Host Configuration Protocol (DHCP) allows the Switch to designate 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 will allocate an IP address to the client. The DHCP client may be then utilize the IP address allocated by the DHCP server as its local configuration. 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 allocated IP address, the range of IP addresses that will be allowed in its DHCP pool, the ability to exclude various IP addresses within the range 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 assign the same IP addresses to important devices. DHCP Server Global Settings This window is used to display and configure the global DHCP server parameters. To view the following window, click Management > DHCP > DHCP Server > DHCP Server Global Settings, as shown below: Figure 4-28 DHCP Server Global Settings Window The fields that can be configured in DHCP Use Class State are described below: Parameter DHCP Use Class State Description Select to enable or disable the DHCP Use Class State here. When enabled, the DHCP server will use DHCP classes for address allocation. Click the Apply button to accept the changes made. The fields that can be configured in DHCP Server Settings are described below: Parameter DHCP Ping Packet DHCP Ping Timeout Description Enter 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. A value of 0 means there is no ping test. The range is from 0 to 10. The default value is 2. Enter the amount of time the DHCP server must wait before timing out a ping packet. The range is from 100 to 10000 milliseconds. The default value is 500 milliseconds. 56