Memcache or Redis configuration instructions?

Can anyone point me to further documentation or setup instructions? I’ve already installed the memcached extension, configured the cache, setup my application variables and yet my session is not being shared. I see the same cfid and session ID on both servers but my session variable only shows on a single server. For reference using Elasticache, which doesn’t seem to be the issue.

component { = "AppName";
    this.datasource = "AppDataSource";
    this.sessionManagement = true;
    this.sessionStorage = 'memcache';
    this.sessionCluster = true;
    this.sessionTimeout = createTimeSpan(0,0,30,0);
    this.setClientCookies = true;

    function onApplicationStart() {