diff --git a/slsReceiverSoftware/include/UDPStandardImplementation.h b/slsReceiverSoftware/include/UDPStandardImplementation.h
index 6b5c0c0c4..dca52e6a4 100644
--- a/slsReceiverSoftware/include/UDPStandardImplementation.h
+++ b/slsReceiverSoftware/include/UDPStandardImplementation.h
@@ -47,7 +47,7 @@ class UDPStandardImplementation: private virtual slsReceiverDefs, public UDPBase
 	 */
 	virtual ~UDPStandardImplementation();
 
-	
+	void configure(map<string, string> config_map);
 
 	/**
 	 * delete and free member parameters
diff --git a/slsReceiverSoftware/src/UDPStandardImplementation.cpp b/slsReceiverSoftware/src/UDPStandardImplementation.cpp
index 0ac51c321..cb8d66c25 100644
--- a/slsReceiverSoftware/src/UDPStandardImplementation.cpp
+++ b/slsReceiverSoftware/src/UDPStandardImplementation.cpp
@@ -91,6 +91,22 @@ UDPStandardImplementation::UDPStandardImplementation()
 		}
 
 
+void UDPStandardImplementation::configure(map<string, string> config_map){
+	FILE_LOG(logWARNING) << __AT__ << " called";
+
+	map<string, string>::const_iterator pos;
+	pos = config_map.find("mode");
+	if (pos != config_map.end() ){
+		int b;
+		if(!sscanf(pos->second.c_str(), "%d", &b)){
+			cout << "Warning: Could not parse mode. Assuming top mode." << endl;
+			b = 0;
+		}
+		bottom = b!= 0;
+		cout << "bottom:"<< bottom << endl;
+	}
+};
+
 void UDPStandardImplementation::initializeMembers(){
 	myDetectorType = GENERIC;
 	maxPacketsPerFile = 0;
@@ -945,12 +961,12 @@ int UDPStandardImplementation::createUDPSockets(){
 	port[1] = server_port[1];
 
 	/** eiger specific */
-	/*
+
 	if(bottom){
 		port[0] = server_port[1];
 		port[1] = server_port[0];
 	}
-	*/
+
 	//if eth is mistaken with ip address
 	if (strchr(eth,'.')!=NULL)
 		strcpy(eth,"");
diff --git a/slsReceiverSoftware/src/slsReceiver.cpp b/slsReceiverSoftware/src/slsReceiver.cpp
index 595a39868..6ffc2fdf9 100644
--- a/slsReceiverSoftware/src/slsReceiver.cpp
+++ b/slsReceiverSoftware/src/slsReceiver.cpp
@@ -65,6 +65,13 @@ slsReceiver::slsReceiver(int argc, char *argv[], int &success){
 	
 		switch(c){
 
+		case 'm':
+			int b;
+			sscanf(optarg, "%d", &b);
+			bottom = b != 0;
+			configuration_map["mode"] = optarg;
+			break;
+
 		case 'f':
 			fname = optarg;
 			//cout << long_options[option_index].name << " " << optarg << endl;
@@ -86,7 +93,7 @@ slsReceiver::slsReceiver(int argc, char *argv[], int &success){
 			string help_message = """\nSLS Receiver Server\n\n""";
 			help_message += """usage: slsReceiver --config config_fname [--rx_tcpport port]\n\n""";
 			help_message += """\t--config:\t configuration filename for SLS Detector receiver\n""";
-			help_message += """\t--mode:\t ???\n""";
+			help_message += """\t--mode:\t 1 for bottom and 0 for top\n""";
 			help_message += """\t--rx_tcpport:\t TCP Communication Port with the client. Default: 1954.\n\n""";
 			help_message += """\t--rest_hostname:\t Receiver hostname:port. It applies only to REST receivers, and indicates the hostname of the REST backend. Default: localhost:8081.\n\n""";
 
@@ -120,10 +127,10 @@ slsReceiver::slsReceiver(int argc, char *argv[], int &success){
 	}
 
 	if (success==OK){
-		FILE_LOG(logINFO) << "SLS Receiver starting " << udp_interface_type << " on port " << tcpip_port_no << endl;
+		FILE_LOG(logINFO) << "SLS Receiver starting " << udp_interface_type << " on port " << tcpip_port_no << " with mode " << bottom << endl;
 		udp_interface = UDPInterface::create(udp_interface_type);
 		udp_interface->configure(configuration_map);
-		tcpipInterface = new slsReceiverTCPIPInterface(success, udp_interface, tcpip_port_no);
+		tcpipInterface = new slsReceiverTCPIPInterface(success, udp_interface, tcpip_port_no, bottom);
 		//tcp ip interface
 	}
 }