/----------------\
                         |     Mapping    |
                         |     System     |
                        .|                |-           
                       ` \----------------/ `.         
                     ,`                       \        
                    /                          `.      
                  ,'         _,..-..,,           ',                 
                 /         -`         `-,          \                
               .'        ,'              \          `,              
               `        '                 \           '             
           +-----+     |                   | RLOC_B1+-----+         
    HostA  |     |    |        RLOC         |-------|     |  HostB  
    EID_A--|ITR_A|----|        Space        |       |ETR_B|--EID_B  
           |     | RLOC_A1                  |-------|     |         
           +-----+     |                   | RLOC_B2+-----+         
                        ,                 /                         
                         \               /                          
                          `',         ,-`                           
                             ``''-''``