|  | 
                
                    
                         
                             |  Constants | 
                          
                         
                             |  unspecified   | 
                             0 | 
                             Unspecified | 
                             
                                  Unspecified 
                              | 
                          
                         
                             |  port-down   | 
                             1 | 
                             Port Down | 
                             
                                  Down because port is down 
                              | 
                          
                         
                             |  encap-down   | 
                             2 | 
                             Encapsulation Down | 
                             
                                  Down because encap is down 
                              | 
                          
                         
                             |  internal-err   | 
                             3 | 
                             Internal Error | 
                             
                                  Down because of internal error 
                              | 
                          
                         
                             |  up   | 
                             4 | 
                             Up | 
                             
                                  up 
                              | 
                          
                         
                             | DEFAULT  | 
                             0 | 
                              ---  | 
                             
                                  Ep operational state qualifier 
                              | 
                          
                    
                 
                 |