A.Localpreference:空,MED:100AS_PATH:200100,Origine:EGP,next_hop:10.110.20.1/16
B.Localpreference:100,MED:100AS_PATH:200,Origine:EGP,next_hop:88.8.8.1/16
C.Localpreference:100,MED:空AS_PATH:EGP,Origine:EGP,next_hop:10.110.20.1/16
D.Localpreference:空,MED:0AS_PATH:100200,Origine:EGP,next_hop:88.8.8.1/16