If NAT is applied to communications between the IPS Cluster or Layer 2 Engine Cluster and some other component that contacts the cluster, define the Default contact address for the IPS Cluster or a Layer 2 Engine Cluster. You can also define location-specific contact addresses. 
  
 
	  
 
		 For more details about the product and how to configure features, click Help or
            press F1.
 For more details about the product and how to configure features, click Help or
            press F1.
 
	 
 
	 Steps
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                Select  Configuration. Configuration.
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		  Right-click an engine element and select 
			 Edit <element type>. 
		   
		   The Engine Editor opens. 
		   
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		  In the 
			 General pane, select the 
			 Location for this element. 
		   
		
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		  Browse to 
			 Interfaces in the navigation pane on the left. 
		   
		
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		  In the tree view, expand the tree and double-click the Cluster Virtual IP Address (CVI) or the IP address for which you want to define a contact address. 
		   
		  On Engine Clusters, the CVI contact address is used for VPNs and NDI contact addresses are used for other system communications.  
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		   In the 
			 IP Address Properties dialog box, double-click the Contact Address cell. 
		   
		
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		  Enter the 
			 Default contact address at the top of the dialog box. 
		   
		  The Default contact address is used by default whenever a component that belongs to another Location connects to this interface. 
		   
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		  If components from some Locations cannot use the Default contact address, click 
			 Add 
			 to define Location-specific contact addresses. 
		   
		
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		  Click the 
			 Contact Address column and enter the IP address that the components belonging to this Location must use when they contact the interface. 
		   
		   
			 Note: Elements that belong to the same Location element always use the primary IP address (defined in the element’s properties) when contacting each other. Elements that do not belong to a specific Location belong to the Default Location. 
			  
 
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		  Click 
			 OK to close the 
			 Exceptions dialog box. 
		   
		
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		  Click 
			 OK to close the 
			 IP Address Properties dialog box.