The following about BGP routing, describing the error, is ?
A, non-aggregate routes take precedence over aggregate routes
B. In PrefVal, Local_ Preference is equal to the case if the route is generated locally, IBGP Routing, the BGP preference for EBGP routing, is generated effectively referring to route priority.
C. See the following entry in the BGP routing table:* 172161.11/32 000010 0? Indicates that the route is available non-optimal
D. For next_hop unreachable routes when invalid routes, do not participate in the preferred.