In the IP Range Selection Criteria menu option, you can specify coordinates or a location that apply to an IP address or range. Custom locations can also be added. This allows users to be routed to services based on private IP addresses/ranges as defined manually. It allows the definition of up to 64 IP ranges per data center. The range is limited by the IPv4 or IPv6 native range. You can specify an IP address or network. Valid entries here are either a single IP, for example 192.168.0.1, or a network in Classless Inter-Domain Routing (CIDR) format, for example 192.168.0.0/24.

GEO supports subnet precedence for custom-defined IP address ranges in IP Range Selection Criteria. For example:

  • 172.16.0.0/12 – United States
  • 172.16.100.0/21 – United Kingdom
  • 172.16.200.0/21 - Germany

GEO uses the longest prefix for resolution when multiple entries are matched. So, using the example above, 172.16.100.1 should match the /21 United Kingdom resolution rules.

To do this, follow the steps below:

  1. In the main menu of the LoadMaster WUI, select Global Balancing.
  2. Select IP Range Selection Criteria.

  3. Enter the IP Address or network. Valid entries here are either a single IP, for example 10.154.11.10, or a network in Classless Inter-Domain Routing (CIDR) format, for example 10.154.11.10/32.
    Note: Do not overlap subnets because this can have unpredictable results.
  4. Click Add Address.

  5. Click Modify.

  6. Specify the coordinates click Save.
  7. Alternatively, select the country from the Location drop-down list.
    Note: The existing IP ranges can be modified or deleted using the buttons provided on the IP Range Selection Criteria screen. You cannot delete IP address ranges if they are configured in an FQDN.

  8. In the main menu of the LoadMaster WUI, select Manage FQDNs.

  9. Click Modify on the relevant FQDN.

  10. If you entered a Proximity using the coordinates in the IP Range Selection Criteria screen, select Proximity in the Selection Criteria drop-down list.
  11. If you selected a location, select Location Based.
  12. Fill out the remaining details as needed.