|  | 
                
                    
                         
                             |  Constants | 
                          
                         
                             |  intra   | 
                             1 | 
                             Intra | 
                             
                                  Infra 
                              | 
                          
                         
                             |  discard-int   | 
                             2 | 
                             Discard internal | 
                             
                                  Discard internal 
                              | 
                          
                         
                             |  inter   | 
                             3 | 
                             Inter | 
                             
                                  Inter 
                              | 
                          
                         
                             |  discard-ext   | 
                             4 | 
                             Discard external | 
                             
                                  Discard external 
                              | 
                          
                         
                             |  ext1   | 
                             5 | 
                             External1 | 
                             
                                  External1 
                              | 
                          
                         
                             |  nssa1   | 
                             6 | 
                             NSSA1 | 
                             
                                  NSSA1 
                              | 
                          
                         
                             |  ext2   | 
                             7 | 
                             External2 | 
                             
                                  External2 
                              | 
                          
                         
                             |  nssa2   | 
                             8 | 
                             NSSA2 | 
                             
                                  NSSA2 
                              | 
                          
                         
                             | DEFAULT  | 
                             intra(1) | 
                             Intra | 
                             
                                  Infra 
                              | 
                          
                    
                 
                 |