diff --git a/orte/test/system/Makefile b/orte/test/system/Makefile
index b6e2854815..28bbf24187 100644
--- a/orte/test/system/Makefile
+++ b/orte/test/system/Makefile
@@ -1,4 +1,4 @@
-PROGS = no_op sigusr_trap spin orte_nodename orte_spawn orte_loop_spawn orte_loop_child orte_abort get_limits orte_ring spawn_child orte_tool orte_no_op binom oob_stress iof_stress iof_delay radix orte_barrier orte_mcast
+PROGS = no_op sigusr_trap spin orte_nodename orte_spawn orte_loop_spawn orte_loop_child orte_abort get_limits orte_ring spawn_child orte_tool orte_no_op binom oob_stress iof_stress iof_delay radix orte_barrier orte_mcast opal_interface
 
 all: $(PROGS)
 
diff --git a/orte/test/system/opal_interface.c b/orte/test/system/opal_interface.c
new file mode 100644
index 0000000000..a4750abaf6
--- /dev/null
+++ b/orte/test/system/opal_interface.c
@@ -0,0 +1,53 @@
+/* -*- C -*-
+ *
+ * $HEADER$
+ *
+ */
+#include <stdio.h>
+#include <unistd.h>
+
+#include "opal/dss/dss.h"
+#include "opal/event/event.h"
+#include "opal/util/if.h"
+#include "opal/runtime/opal.h"
+
+int main(int argc, char* argv[])
+{
+    int rc, idx;
+    uint32_t addr, netmask, netaddr;
+    struct sockaddr_in inaddr;
+
+    if (0 > (rc = opal_init())) {
+        fprintf(stderr, "orte_interface: couldn't init opal - error code %d\n", rc);
+        return rc;
+    }
+    
+    rc = opal_iftupletoaddr(argv[1], &netaddr, &netmask);
+    
+    fprintf(stderr, "netaddr %03d.%03d.%03d.%03d netmask %03d.%03d.%03d.%03d rc %d\n",
+            OPAL_IF_FORMAT_ADDR(netaddr), OPAL_IF_FORMAT_ADDR(netmask), rc);
+    
+    /* search for a matching interface - take the first one within the returned scope */
+    idx = opal_ifbegin();
+    while (0 < idx) {
+        /* ignore the loopback interface */
+        if (opal_ifisloopback(idx)) {
+            fprintf(stderr, "LOOPBACK IGNORED\n");
+            idx = opal_ifnext(idx);
+            continue;
+        }
+        if (0 != (rc = opal_ifindextoaddr(idx, (struct sockaddr*)&inaddr, sizeof(inaddr)))) {
+            break;
+        }
+        addr = ntohl(inaddr.sin_addr.s_addr);
+        fprintf(stderr, "checking netaddr %03d.%03d.%03d.%03d addr %03d.%03d.%03d.%03d netmask %03d.%03d.%03d.%03d rc %d\n",
+                OPAL_IF_FORMAT_ADDR(netaddr), OPAL_IF_FORMAT_ADDR(addr), OPAL_IF_FORMAT_ADDR(netmask), rc);
+        if (netaddr == (addr & netmask)) {
+            fprintf(stderr, "MATCH FOUND\n");
+        }
+        idx = opal_ifnext(idx);
+    }
+
+    opal_finalize();
+    return 0;
+}
diff --git a/orte/test/system/orte_mcast.c b/orte/test/system/orte_mcast.c
index 60c74e62f0..59f27de4e4 100644
--- a/orte/test/system/orte_mcast.c
+++ b/orte/test/system/orte_mcast.c
@@ -32,13 +32,13 @@ int main(int argc, char* argv[])
         fprintf(stderr, "orte_nodename: couldn't init orte - error code %d\n", rc);
         return rc;
     }
-
+    
     gethostname(hostname, 512);
     pid = getpid();
-
+    
     printf("orte_nodename: Node %s Name %s Pid %ld\n",
            hostname, ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), (long)pid);
-
+    
     
     OBJ_CONSTRUCT(&buf, opal_buffer_t);
     
@@ -46,16 +46,20 @@ int main(int argc, char* argv[])
         orte_grpcomm.barrier();
         fprintf(stderr, "%d: past barrier\n", (int)ORTE_PROC_MY_NAME->vpid);
         
-        if (ORTE_SUCCESS != (rc = orte_rmcast.recv_nb(ORTE_RMCAST_APP_PUBLIC_ADDR, cbfunc, NULL))) {
+        if (ORTE_SUCCESS != (rc = orte_rmcast.recv_nb(0, ORTE_RMCAST_PERSISTENT,
+                                                      ORTE_RMCAST_TAG_WILDCARD,
+                                                      cbfunc, NULL))) {
             ORTE_ERROR_LOG(rc);
         }
         opal_dss.pack(&buf, &i32, 1, OPAL_INT32);
-            if (ORTE_SUCCESS != (rc = orte_rmcast.send(ORTE_RMCAST_APP_PUBLIC_ADDR, &buf))) {
-                ORTE_ERROR_LOG(rc);
-                goto blast;
-            }
+        if (ORTE_SUCCESS != (rc = orte_rmcast.send(0, ORTE_RMCAST_TAG_WILDCARD, &buf))) {
+            ORTE_ERROR_LOG(rc);
+            goto blast;
+        }
     } else {
-        if (ORTE_SUCCESS != (rc = orte_rmcast.recv_nb(ORTE_RMCAST_APP_PUBLIC_ADDR, cbfunc, NULL))) {
+        if (ORTE_SUCCESS != (rc = orte_rmcast.recv_nb(0, ORTE_RMCAST_PERSISTENT,
+                                                      ORTE_RMCAST_TAG_WILDCARD,
+                                                      cbfunc, NULL))) {
             ORTE_ERROR_LOG(rc);
         }
         orte_grpcomm.barrier();
@@ -71,10 +75,21 @@ blast:
     return 0;
 }
 
-static void cbfunc(int channel, opal_buffer_t *buf, void *cbdata)
+static void cbfunc(int channel, opal_buffer_t *buffer, void *cbdata)
 {
+    opal_buffer_t buf;
+    int32_t i32=1, rc;
+
     fprintf(stderr, "GOT MESSAGE\n");
     fflush(stderr);
+    if (0 != ORTE_PROC_MY_NAME->vpid) {
+        OBJ_CONSTRUCT(&buf, opal_buffer_t);
+        opal_dss.pack(&buf, &i32, 1, OPAL_INT32);
+        if (ORTE_SUCCESS != (rc = orte_rmcast.send(0, ORTE_RMCAST_TAG_WILDCARD, &buf))) {
+            ORTE_ERROR_LOG(rc);
+        }
+        OBJ_DESTRUCT(&buf);
+    }
     orte_finalize();
     exit(0);
 }