DGMGRL> show database "BXA1" FastStartFailoverTarget
  FastStartFailoverTarget = 'BXA3,BXA2'
DGMGRL> show database "BXA2" FastStartFailoverTarget
  FastStartFailoverTarget = 'BXA1,BXA3'
DGMGRL> show database "BXA3" FastStartFailoverTarget
  FastStartFailoverTarget = 'BXA1,BXA2'
DGMGRL> show database "BXA1" RedoRoutes
  RedoRoutes = '(LOCAL : (BXA3 SYNC PRIORITY=1, BXA2 SYNC PRIORITY=2))'
DGMGRL> show database "BXA2" RedoRoutes
  RedoRoutes = '(LOCAL : BXA1 SYNC, BXA3 SYNC)'
DGMGRL> show database "BXA3" RedoRoutes
  RedoRoutes = '(LOCAL : BXA1 SYNC, BXA2 SYNC)(BXA1 : BXA2 ASYNC)'

DGMGRL> show configuration when primary is "BXA1"

Configuration when BXA1 is primary - bxacfg

  Members:
  BXA1  - Primary database
    BXA3  - Physical standby database
      BXA2  - Physical standby database (receiving current redo)
    BXA2  - Physical standby database (alternate of BXA3)


ENABLE FAST_START FAILOVER
No new Fast-start Failover target of BXA1 found
  BXA3: incompatible log transport mode
  BXA2: incompatible log transport mode
Fast-Start Failover (FSFO) cannot be enabled because
Theres no valid Fast-Start Failover (FSFO) target
ORA-16693, failed to enable Fast-Start Failover (FSFO)
ENABLE FAST_START FAILOVER completed with error ORA-16693

 The primary database has multiple routes to the fast-start failover target standby database.