title: Configure Apache Ignite Cluster on multiple nodes
body: <p>I want to setup Ignite cluster on 3 nodes on different IPs. I am following  <a href="https://apacheignite.readme.io/docs/tcpip-discovery#section-multicast-ip-finder" rel="nofollow noreferrer">the official guide</a>and using this configuration. I have listed the node IPs in multicastGroup property - unfortunately this does not work, throwing following exception</p>
  
  <pre><code>[09:08:40,852][SEVERE][main][TcpDiscoverySpi] Failed to register local node address in IP finder on start (retrying every 2000 ms; change 'reconnectDelay' to configure the frequency of retries).
      class org.apache.ignite.spi.IgniteSpiException: Unknown multicast group: 10.10.17.1,10.10.17.2,10.10.17.3
  </code></pre>
  
  <p>This is my configuration file </p>
  
  <pre><code>&lt;beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="
     http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans.xsd"&gt;
  &lt;!--
      Alter configuration below as needed.
  --&gt;
  &lt;bean id="grid.cfg" class="org.apache.ignite.configuration.IgniteConfiguration"&gt;
      &lt;property name="discoverySpi"&gt;
           &lt;bean class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi"&gt;
               &lt;property name="ipFinder"&gt;
                   &lt;bean class="org.apache.ignite.spi.discovery.tcp.ipfinder.multicast.TcpDiscoveryMulticastIpFinder"&gt;
                       &lt;property name="multicastGroup" value="10.10.17.1,10.10.17.2,10.10.17.3"/&gt;
                   &lt;/bean&gt;
               &lt;/property&gt;
           &lt;/bean&gt;
      &lt;/property&gt;
  &lt;/bean&gt;
  &lt;/beans&gt;
  </code></pre>
  
  <p>How to setup correctly?</p>