Inactivity timer example 2

Consider the following time-annotated console:

d net,rtps                                                             
    ... 
IST1695I PU NAME       CP NAME      COS NAME SWITCH CONGEST  SESSIONS 
IST1696I CNR00004 NETA.SSCP2A       #INTER     NO      NO           1 
IST1696I CNR00003 NETA.SSCP2A       RSETUP     NO      NO           0 
    ...
(11:34:56) Break the IP connectivity.
v tcpip,,stop,trle1a                                                   
EZZ0060I PROCESSING COMMAND: VARY TCPIP,,STOP,TRLE1A         
EZZ0053I COMMAND VARY STOP COMPLETED SUCCESSFULLY            
EZZ4315I DEACTIVATION COMPLETE FOR DEVICE TRLE1A     
(11:36:23) The LDLC layer detects loss of IP connectivity and 
           disconnects EE connection.        
IST1411I INOP GENERATED FOR LNIP1                            
IST1430I REASON FOR INOP IS XID OR LDLC COMMAND TIMEOUT    
IST314I END                                                           
IST259I INOP RECEIVED FOR SWIP2A1 CODE = 01                           
IST619I ID = SWIP2A1 FAILED - RECOVERY IN PROGRESS                    
IST1196I APPN CONNECTION FOR NETA.SSCP2A INACTIVE - TGN = 21          
IST590I CONNECTION TERMINATED FOR PU SWIP2A1 ON LINE LNIP1            
IST1494I PATH SWITCH STARTED FOR RTP CNR00004                         
IST621I RECOVERY SUCCESSFUL FOR NETWORK RESOURCE SWIP2A1              
IST1488I INACTIVATION FOR RTP CNR00003 AS PASSIVE PARTNER COMPLETED   
IST619I ID = CNR00003 FAILED - RECOVERY IN PROGRESS                   
IST129I UNRECOVERABLE OR FORCED ERROR ON NODE CNR00003 - VARY INACT SCHED
IST105I CNR00003 NODE NOW INACTIVE                                    
IST871I RESOURCE CNR00003 DELETED                                     
(11:38:23) CNR00004's path switch timer (2 min for interactive TP) expires.  
           CNR00004 goes inactive.
IST1494I PATH SWITCH FAILED FOR RTP CNR00004     
IST1495I NO ALTERNATE ROUTE AVAILABLE                                          
IST314I END                                                                    
IST1488I INACTIVATION FOR RTP CNR00004 AS ACTIVE PARTNER COMPLETED    
IST619I ID = CNR00004 FAILED - RECOVERY IN PROGRESS                   
IST129I UNRECOVERABLE OR FORCED ERROR ON NODE CNR00004 - VARY INACT SCHED
IST105I CNR00004 NODE NOW INACTIVE                                    
IST871I RESOURCE CNR00004 DELETED

In this example, the LDLC parameters (LIVTIME, SRQTIME, and SRQRETRY) yield a longer disconnect detection time of 95 seconds, as shown in the following equation. The keyword DISCNT=YES is coded on the Enterprise Extender PU in its switched major node and, in the XCA major node on the PORT statement, LIVTIME is set to 20, SRQTIME to 15, and SRQRETRY to 4.

20 + ((4+1) * 15) = 95 seconds

DISCNTIM is also much longer (240 seconds) than in the previous example, giving an RTP liveness timer value of 120 seconds.

In this example, the LDLC layer detects the outage first, generating an inoperative indication 87 seconds (again, close to the predicted value) after the IP connectivity is broken. In this case, the local link's inoperative transition forces the RTP connection CNR00004 to go immediately into path switch as can be seen by the IST1494I message several lines after the inoperative indication occurs at 11:36:23. Two minutes later (again based on the HPRPST value for interactive TP), at 11:38:23, the path switch timer expires and the RTP connection is terminated.