From each active SOAM in a DSR topology, click Diameter, and then Maintenance, and then Applications.
Under DSR Application Name, select each FABR row.
To select more than one row, press and hold Ctrl while you click each row.
Click Enable.
Verify the application status on the page.
The Admin State, Operational Status, Operational Reason, and Congestion Level in each of the selected rows should have changed respectively to Enabled, Available, Normal, and Normal.