Sends given message `rr_msg` to peer.

        Parameters:
            - rr_msg: (RouteRefresh) route refresh message to send to peer.

        Update appropriate counters and set appropriate timers.

def _send_outgoing_route_refresh_msg(self, rr_msg):
        """Sends given message `rr_msg` to peer.

        Parameters:
            - rr_msg: (RouteRefresh) route refresh message to send to peer.

        Update appropriate counters and set appropriate timers.
        """
        assert rr_msg.type == BGP_MSG_ROUTE_REFRESH
        self._protocol.send(rr_msg)
        LOG.debug('RouteRefresh %s>> %s',
                  self._neigh_conf.ip_address, rr_msg)
        # Collect update statistics for sent refresh request.
        if rr_msg.demarcation == 0:
            self.state.incr(PeerCounterNames.SENT_REFRESH)
        # If SOR is sent, we set Max. EOR timer if needed.
        elif (rr_msg.demarcation == 1 and
              self._common_conf.refresh_max_eor_time != 0):
            eor_timer = self._common_conf.refresh_max_eor_time
            # Set timer to send EOR demarcation.
            self._spawn_after('end-of-rib-timer', eor_timer,
                              self._enqueue_eor_msg, rr_msg)
            LOG.debug('Enhanced RR max. EOR timer set.')