Groups

To configure Group settings

1. Navigate to the NETWORK | System > Failover & LB page.

2. Click Configure for the Group you wish to configure in the Groups table on the NETWORK | System > Failover & LB page. The Edit LB Group dialog displays.

   

3. From the Outbound Load Balancing Method section, choose the type (or method) of LB; options change depending on the type selected:

   • Basic Active/Passive Failover—The four WAN interfaces use rank to determine the order of preemption when Preempt and failback to preferred interfaces when possible has been enabled. Only a higher-ranked interface can preempt an active WAN interface. This is selected by default.
   • Per Connection Round-Robin—This option now allows you to reorder the WAN interfaces for Round Robin selection. The default order is:
     • Primary WAN Percentage
     • Alternate WAN #1 Percentage
     • Alternate WAN #2 Percentage
     • Alternate WAN #3 Percentage

     The Round Robin then returns to the primary WAN to continue the order.

   • Spillover-based—The bandwidth threshold applies to the primary WAN. When the threshold is exceeded, new traffic flows are allocated to the alternates in a Round Robin manner. If the primary WAN bandwidth goes below the configured threshold, Round Robin stops, and outbound new flows are again sent out only through the Primary WAN.

     Existing flows remain associated with the alternates (as they are already cached) until they time out normally.

   • Ratio—A percentages can be set for each WAN in the LB group. To avoid problems associated with configuration errors, ensure that the percentage corresponds correctly to the WAN interface it indicates.

4. Depending on what you selected from Outbound Load Balancing Method, one of these options display:

   Type Drop-down Options

   Type Selection	Option
   Basic Active/Passive Failover	Preempt and failback to Primary WAN when possible Select to enable rank to determine the order of preemption. Selected by default.
   Spillover-based	When bandwidth exceeds Bandwidth Limit Kbit/s on Primary Interface, new flows go to the alternate group members in Round Robin manner Specify the bandwidth for the Primary in the field. If this value is exceeded, new flows are then sent to alternate group members according to the order listed in the Selected column. This option is not selected by default. The default value is 0.
   Round Robin, Spillover, and Percentage	Use Source and Destination IP Address binding The option is especially useful when using HTTP/HTTPS redirection or in a similar situation. For example, connection A and connection B need to be on the same WAN interface, the source and destination IP addresses in Connection A are the same as those for connection B, but a different service is being used. In this case, source and destination IP address binding is required to keep both the connections on the same WAN interface so that the transactions do not fail. This option is not selected by default.

5. Add, delete, and order member interfaces in the Group Members: Select here:/Selected Primary/Alt. Poll: lists. The use of the selected members in the Selected list depends on the Type selected:
   • Basic Active/Passive Failover: Interface Ordering:
   • Per Connection Round Robin: Interface Pool:
   • Spillover-based: Primary/Alt. Pool:
   • Percentage-based: Interface Distribution:

6. Add members by selecting a displayed interface from the Group Members: column, and then clicking Add>>.

   If you selected Percentage-based, instead of ordering the entries, you can specify the percentage of bandwidth for each interface. See Configuring Bandwidth as a Percentage.

   To avoid problems associated with configuration errors, ensure that the percentage corresponds correctly to the WAN interface it indicates.

   1. Enter a percentage of bandwidth to be assigned to an interface in the percent (%) field. The total bandwidth for all interfaces should add up to 100%. The total percentage of bandwidth allocated is displayed.

   Delete members from the Selected: column by:

   1. Selecting the displayed interface.
   2. Clicking <<Remove.

The interface at the top of the list is the Primary.

The Interface Rank does not specify the operation performed on the individual member. The operation that is performed is specified by the Group Type.

7. Click OK.

8. Complete the Probing tab.