Table of Contents

 1     Scope          
 2     References 
 3     Definitions 
        3.1     Terms defined elsewhere           
        3.2     Terms defined in this Recommendation 
 4     Abbreviations and acronyms
 5     Conventions             
 6     EVP-Tree service     
        6.1     Description     
        6.2     EVP-Tree service architecture  
 7     EVC and EC service attributes for the EVP-Tree service             
        7.1     EVC service attributes 
        7.2     EC service attributes    
 8     UNI service attributes for the EVP-Tree service            
 9     NNI service attributes for the EVP-Tree service            
        9.1     INNI service attributes
        9.2     ENNI service attributes              
10     Connectivity monitoring for the EVP-Tree service      
Annex A – EP-Tree service – Ethernet private tree service    
        A.1     EP-Tree service            
        A.2     EVC and EC service attributes for the EP-Tree service     
        A.3     UNI service attributes for the EP-Tree service    
        A.4     NNI service attributes for the EP-Tree service    
        A.5     Connectivity monitoring for the EP-Tree service
Appendix I – Examples of EVP-Tree services    
        I.1                 Single root          
        I.2                 Redundant root  
        I.3                 Load-balance root            
        I.4                 Hierarchical branch         
Appendix II – Protection of EVP-Tree service    
       II.1     1+1 protection switching architecture    
       II.2     1:1 protection switching architecture