[44net] BGP annuncement of same address Block from 2 sites ?

Hi there Is it possible to announce same Address Block from two different sites ? with preferred way for one site ? The idea is to have redundancy in case that one site connectivity fail the traffic will pass to the other site automatically Both site will be connected by radio as well so Network connectivity will not stop I know that BGP support it is it also the way in the AMPRNET BGP announcement ? Has anyone done it ? or doing it in the AMPRNET community ? Thanks Forward Ronen - 4Z4ZQ