(Item 008475) Close DLUR/S network priority pacing windows later                
----------------------------------------------------------------                
At the AIW14 DLUR Performance BOF, it was pointed out that DLUR/S               
implementations normally close all of their session pacing windows at           
the same time when congestion is detected.  This makes efforts to               
reduce congestion, e.g., sending DACTPUs and DACTLUs over the CP-SVR            
pipe, not only ineffective but also a contributor to increased                  
congestion.                                                                     
                                                                                
Since these session deactivation commands flow at network priority, the         
implementations could be updated to allow the network priority pacing           
windows to be closed later than the other priorities, giving the                
deactivation commands a chance to reduce congestion.                            
                                                                                
The DLUR architecture reference will be updated with a new section on           
CP-SVR Pipe Performance Considerations.  Included will be the                   
following:                                                                      
                                                                                
   It is recommended that DLUR products close their network priority            
   pacing windows last (instead of the more typical simultaneous                
   closing of all pacing windows regardless of priority).  Since                
   SSCP-PU/LU session activation and deactivation commands flow at              
   network priority, they should be allowed to flow as long as                  
   possible so that they can be used to help reduce network congestion.