mod_cluster subsystem find any http server on the network

I configure a Load Balanced HA Standalone Cluster, in my machine however in the network there is other apache http server when I wake up the server I get the next error:

MODCLUSTER000043: Failed to send INFO to 10.21.51.121/10.21.51.121:22001: java.net.NoRouteToHostException: No existe ninguna ruta hasta el «host»

I configure the mod_cluster in standalone-full-ha with:

<subsystem xmlns="urn:jboss:domain:modcluster:1.2">
<mod-cluster-config advertise-socket="modcluster" proxy-list="127.0.0.1:80" balancer="jdcluster" connector="ajp">
<dynamic-load-provider>
<load-metric type="cpu"/>
</dynamic-load-provider>
</mod-cluster-config>
</subsystem>

Then get the same error.