Configuration - D-Link DSL-2790U User Manual

Configuration

To support this feature, you must create mapping groups with appropriate LAN
and WAN interfaces using the Add button. The Remove button will remove the
grouping and add the ungrouped interfaces to the Default group. Only the default
group has IP interface.
Click Add to do advanced settings.
To create a new mapping group, enter Group Name, add interfaces to Grouped
Interfaces.
Click Apply / Save to save the changes.