+/*
  * Avoids to check link status when starting/stopping a port.
  */
 uint8_t no_link_check = 0; /* check by default */

@@ -1422,6 +1427,15 @@ static void eth_event_callback(uint8_t port_id,
 		if (port->need_reconfig > 0) {
 			port->need_reconfig = 0;

+			if (isolated_mode) {
+				int ret = port_flow_isolate(pi, 1);
+				if (ret) {
+					printf("Failed to apply isolated"
+					       " mode on port %d\n", pi);
+					return -1;
+				}
+			}
+