Enqueues current routes to be shared with this peer.

def _enqueue_init_updates(self):
        """Enqueues current routes to be shared with this peer."""
        assert self.state.bgp_state == const.BGP_FSM_ESTABLISHED
        if self.is_mbgp_cap_valid(RF_RTC_UC):
            # Enqueues all best-RTC_NLRIs to be sent as initial update to this
            # peer.
            self._peer_manager.comm_all_rt_nlris(self)
            self._schedule_sending_init_updates()
        else:
            # Enqueues all best-path to be sent as initial update to this peer
            # expect for RTC route-family.
            tm = self._core_service.table_manager
            self.comm_all_best_paths(tm.global_tables)