Global Load Balancing : Configuring virtual server pools
 
Configuring virtual server pools
The virtual server pool configuration defines the set of virtual servers that can be matched in DNS resource records, so it should include, for example, all the virtual servers that can be responses for DNS requests to resolve www.example.com. You also specify the key parameters of the global load balancing algorithm, including proximity option, status checking options, load balancing method, and weight.
Before you begin:
• You must have created GLB Servers configuration objects.
• You must have Read-Write permission for Global DNS Server settings.
After you have created a virtual server pool configuration object, you can specify it in the global load balancing host configuration.
To configure a virtual server pool:
1. Go to Global Load Balance > FQDN Settings.
2. Click the Virtual Server tab.
3. Click Add to display the configuration editor.
4. Complete the configuration as described in Table 35.
5. Save the configuration.
Table 35: Virtual server pool configuration
Settings
Guidelines
Name
Configuration name. Valid characters are A-Z, a-z, 0-9, _, and -. No spaces. You reference this name in the host configuration.
Note: After you initially save the configuration, you cannot edit the name.
Proximity
• None—Proximity not used.
• GEO—Proximity based on geolocation.
• GEO-ISP—Proximity based on IP address belonging to an ISP address group first, then geolocation.
Check Server Status
Enable/disable polling of the local FortiADC SLB. If the server is unresponsive, its virtual servers are not selected for DNS answers.
Check Virtual Server Existence
Enable/disable checks on whether the status of the virtual servers in the virtual server list is known. Virtual servers with unknown status are not selected for DNS answers.
Default Feedback IPv4
Specify an IP address to return in the DNS answer if no virtual servers are available.
Default Feedback IPv6
Specify an IPv6 address to return in the DNS answer if no virtual servers are available.
Member
Server
Select a GLB Servers configuration object.
Server Member
Select the name of the virtual server that is in the servers virtual server list configuration.
Weight
Assigns relative preference among members—higher values are more preferred and are assigned connections more frequently.
The default is 1. The valid range is 1-255.
Backup
Enable to designate the member as a backup. Backup members are inactive until all main members are down.