Advertised Distance is the distance a neighbor router says, or advertises, is the distance to a destination. This is key in electing a feasible successor or backup route. The lower the distance, the better. The lower the value the better the route is believable. These values can be changed with the distance command.

Administrative Distances

Protocol                             Distance Value

Connected Interface                        0
Static routes                                        1
EIGRP Summary routes                 5
EBGP                                                      20
Internal EIGRP                                 90
IGRP                                                     100
OSPF                                                     110
RIP                                                        120
EGP                                                       140
External EIGRP                               170
Internal BGP                                    200