Adding DHCPv4 ranges - BlueCat Address Manager - 9.0.0

Address Manager Administration Guide

prodname
BlueCat Address Manager
version_custom
9.0.0

Add DHCPv4 ranges to configure IPv4 addresses that can be allocated to clients on the network.

To add IPv4 DHCP ranges:

  1. From the configuration drop-down menu, select a configuration.
  2. Select the IP Space tab. Tabs remember the page you last worked on, so select the tab again to ensure you're on the Configuration information page.
  3. Under IPv4 Blocks, click an IPv4 block.
  4. Under Blocks and Networks, click an IPv4 network.
  5. Click the DHCP Ranges tab.
  6. Under DHCP Ranges, click New. If you are editing a DHCPv6 range, click the DHCPv6 range name menu and select Edit.
  7. From the Create By drop-down menu under Address Range, select the type of method that will be used to create a DHCP range and define the address range. Parameter fields for the option vary by a type of method that you select.
    • If you select IP Addresses, the following fields will be populated:
      • Start—type the address for the start of the DHCP range.
      • End—type the address for the end of the DHCP range.
      • Name—type a descriptive name for the DHCP range.
      • Split DHCP range around static and reserved addresses—select this check box to automatically split the DHCP range at any static or reserved addresses that may be in the network and within the DHCP range. Upon deployment, Address Manager automatically creates multiple DHCP pools on the managed server, leaving any static addresses outside of the DHCP range you specify. When not selected, any static or reserved addresses within the DHCP range become part of the DHCP range.
    • If you select Offsets, the following fields will be populated:
      • Start Offset—enter a value for the starting position of the DHCP range. Start Offset will be counted from the very first IP address which is Network ID.
      • End Offset—enter a value for the ending position of the DHCP range. End Offset will be counted from the very last IP address which is Network Broadcast Address.
      • Name—type a descriptive name for the DHCP range.
      • Split DHCP range around static and reserved addresses—select this check box to automatically split the DHCP range at any static or reserved addresses that may be in the network and within the DHCP range. Upon deployment, Address Manager automatically creates multiple DHCP pools on the managed server, leaving any static addresses outside of the DHCP range you specify. When not selected, any static or reserved addresses within the DHCP range become part of the DHCP range.
    • If you select Offset and Percentage, the following fields will be populated:
      • Offset—enter a value for the starting position of the DHCP range. The position of Offset will be counted from the very first IP address or the last IP address in the network depending on the direction option that you select in the Direction field. Offset must not be zero.
      • Percentage—enter a value for the size of the DHCP range in proportion to the parent network size. For example, the value 20 represents 20% of the parent network size. Percentage must not be zero and be equal to or less than 100%.
      • Direction—select the starting IP address’ offset position. If you select from start, the position of the starting IP address will be counted from the very first IP address in the network. If you select from end, the position of the starting IP address will be counted from the very last IP address in the network.
      • Name—type a descriptive name for the DHCP range.
      • Split DHCP range around static and reserved addresses—select this check box to automatically split the DHCP range at any static or reserved addresses that may be in the network and within the DHCP range. Upon deployment, Address Manager automatically creates multiple DHCP pools on the managed server, leaving any static addresses outside of the DHCP range you specify. When not selected, any static or reserved addresses within the DHCP range become part of the DHCP range.
  8. Under Scope (Range) Split, select the Scope Split Windows Network check box to create a split scope range. It creates a split scope range for two Windows servers. Define the split scope parameters in the fields that appear:
    • Exclude Server 1—when selected, the entire range is excluded from the first server. The entire range will be hosted on the second server.
    • Exclude Server 2—when selected, the entire range is excluded from the second server. The entire range will be hosted on the first server.
    • Split Address—select this option and type the IP address at which the scope is to be split; the range will be split between the two servers at the split address. The first portion of the range, from the start address to the split address, will be active on Server 1 and excluded from Server 2. The second portion of the range, from the first address after the split address to the end address, will be active on Server 2 and excluded from Server 1. For more information when used with Windows servers, refer to BlueCat Address Manager for Windows Server.
    • Preview button—click to display a preview of how the split scope DHCP range will be deployed. The Server 1 and Server 2 fields show the address ranges to be deployed to each server.
  9. Under DHCP Alert Settings, set the values for DHCP alerts:
    Inherit Watermark Value from Parent—when selected, the block inherits the DHCP alert settings from its parent object.

    Low Watermark—triggers an alert when DHCP use falls below this value (when too few addresses are being used).

    High Watermark—triggers an alert when a DHCP use rises above this value (when too many addresses are being used).

    Note: If you are using a Shared Network in DHCP, a DHCP Alert notification for all networks inside the Shared Network will be sent as a single entity notification using the DHCP Alert set at the configuration level. DHCP Alerts for each individual network within any Shared Network will also be sent only if object-specific DHCP Alerts are set at the network or DHCPv4 range level.
  10. Under Change Control, add comments, if required.
  11. Click Add or click Add Next.