You can combine two or more interfaces to a group. Groups can ease your configuration tasks. When creating multipath rules, you need to configure a group if you want to balance traffic over a defined group of uplink interfaces only instead of using all uplink interfaces.
To configure a Group interface, proceed as follows:
On the Interfaces tab, click New Interface.
The Add Interface dialog box opens.
Make the following settings:
Name: Enter a descriptive name for the interface.
Type: Select Group from the drop-down list.
Interfaces: Add the interfaces to be grouped.
Comment (optional): Add a description or other information.
The group is added to the interface list. Groups do not have a status.
To show only interfaces of a certain type, select the type of the interfaces you want to have displayed from the drop-down list. To either edit or delete an interface, click the corresponding buttons.