DHCP Advanced Settings Help

The DHCP Advanced Settings page is used to modify the advanced options of the DHCP server on the Quadro. This page contains a table where a list of default DHCP server options is already defined. More options can be added from this page, as well as settings of the existing options can be modified. All options in the table on this page are then sent to the DHCP clients.

The following functional buttons are available:

Add opens a page Add Entry page where a new DHCP server option can be defined. The Add Entry page contains a group of manipulation radio buttons to select between the predefined DHCP server options or to define your own DHCP server option:

  • Predefined - this selection allows you to select from the predefined DHCP server options.
    • The Option Name drop down list contains the most common DHCP server options.
    • The Option Value text field requires the value for the selected option. The type and format of the value inserted in this field is dependent on the option selected from the Option Name drop down list.
  • Custom - this selection allows you to define a new DHCP server options. The following parameters are required to be inserted for a new option:
    • The Option Code text field is used to insert a code of the option. It may have values in a range from 0 to 255.
    • The Option Value Type drop down list is used to select the type of the option value. It may be an IP address, a boolean or integer value, etc.
    • The Option Value text field is used to insert the value of an option. Depending on the selected Option Value Type, this field should have the corresponding value. Warning messages will prevent saving if the value inserted in this field does not correspond to the requirements of the Option Value Type. If an array should be inserted here, the values should be separated with a comma.

Edit opens a page Edit Entry where an existing DHCP server option settings can be modified. This page includes the same components like the Add Entry page does.

Delete removes the selected DHCP server option(s). If no records are selected an error message occurs.

Select all selects all existing DHCP server option(s).

Inverse selection inverses the current selection of DHCP server options (if no records are selected, all records will be checked).

The Authoritative checkbox is used to enable/disable authoritative mode on the Quadro DHCP server. Disabling the checkbox is recommended if several DHCP servers are used on the network and the Quadro should provide network parameters to IP phones only.

The Ping Check checkbox enables checking the availability of an IP address on the network before providing it to a client. If this checkbox is selected, the Quadro will first ping an IP address retrieved from the IP pool and wait for a reply. If no a reply is received within a timeout specified in the Ping timeout text field (by default 1 sec), the retrieved IP address will be provided to the client. If otherwise, a new IP address will be retrieved from the IP pool and the procedure will be repeated. If this checkbox is not selected, the Quadro will provide an IP address immediately when requested.