'Notify the agent that is hosting the router.'

def _notification_host(self, context, method, host, use_call=False, **kwargs):

    LOG.debug('Notify    agent    at    %(host)s    the    message    %(method)s', {'host': host, 'method': method})
    cctxt = self.client.prepare(server=host)
    rpc_method = (ag_utils.retry(cctxt.call, AGENT_NOTIFY_MAX_ATTEMPTS) if use_call else cctxt.cast)
    rpc_method(context, method, **kwargs)
