public void forceQuickPing() {
        if (canSkipPing()) {
            return;
        }
        logger.debug("LoadBalancer [{}]:  forceQuickPing invoking", name);
        
        try {
        	new Pinger(pingStrategy).runPinger();
        } catch (Exception e) {
            logger.error("LoadBalancer [{}]: Error running forceQuickPing()", name, e);
        }
    }
Class that contains the mechanism to "ping" all the instances

@author stonse
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/BaseLoadBalancer.java