Tomcat 9 Session replication

[Alan F]

We are currently getting traffic from all cluster members in other environments 
using .staticmember opposed to multicast can I confirm why this is see below.

What do we need to set here for a clustered pair to make them unique and talk 
to eachother only without seeing traffic from other members in Catalina.out

This is how they are currently configured as you can see only difference 
between nodes is the receiver and member ips are reversed. Im concerned 
uniqueID is the same, do we also need to specify domain? 

WE have hostname A and B if you could check below:

HOSTNAME A config

<!--
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" 
channelSendOptions="8">
          <Manager className="org.apache.catalina.ha.session.DeltaManager"
                   expireSessionsOnShutdown="false"
                   notifyListenersOnReplication="true"/>


<Channel className="org.apache.catalina.tribes.group.GroupChannel">
        <Sender 
className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
            <Transport 
className="org.apache.catalina.tribes.transport.nio.PooledParallelSender" />
        </Sender>
        <Receiver
            address="hostnameA"
            autoBind="0"
            className="org.apache.catalina.tribes.transport.nio.NioReceiver"
            maxThreads="6"
            port="4100"
            selectorTimeout="5000"
        />
        <!-- <Interceptor 
className="com.dm.tomcat.interceptor.DisableMulticastInterceptor" /> -->
        <Interceptor 
className="org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor" 
staticOnly="true"/>
        <Interceptor 
className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector" />
        <Interceptor 
className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">
            <Member
                className="org.apache.catalina.tribes.membership.StaticMember"
port="4100"
                host="HostnameB"
                uniqueId="{0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1}"
            />
          <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"
                    tempDir="/opt/tomcat/war-temp/"
     deployDir="/opt/tomcat/war-deploy/"
                    watchDir="/opt/tomcat/war-listen/"
                    watchEnabled="true"/>

        </Interceptor>
        <Interceptor 
className="org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor"
 />
    </Channel>
    <Valve