Using the EE connectivity test to verify multipath routing

In "EE connectivity test with multipath routing enabled", the operator on HostA verifies the Enterprise Extender multipath routing environment by performing the following EE connectivity test:

Figure 1. EE connectivity test with multipath routing enabled (part 1 of 2)

D NET,EEDIAG,TEST=YES,IPADDR=(9.67.1.1,9.67.1.6),LIST=DETAIL

IST097I DISPLAY ACCEPTED
IST350I DISPLAY TYPE = EEDIAG
IST2119I ENTERPRISE EXTENDER DISPLAY CORRELATOR: EE00000E
IST2067I EEDIAG DISPLAY ISSUED ON 10/04/05 AT 11:05:50
IST1680I LOCAL IP ADDRESS 9.67.1.1
IST1680I REMOTE IP ADDRESS 9.67.1.6 
IST2023I CONNECTED TO LINE LN11
IST2126I CONNECTIVITY TEST IN PROGRESS
IST314I END

Figure 2. EE connectivity test with multipath routing enabled (part 2 of 2)

IST350I DISPLAY TYPE = EEDIAG
IST2130I ENTERPRISE EXTENDER CONNECTIVITY TEST INFORMATION 
IST2119I ENTERPRISE EXTENDER DISPLAY CORRELATOR: EE00000E
IST2131I EEDIAG DISPLAY COMPLETED ON 10/04/05 AT 11:05:52
IST2132I LDLC PROBE VERSIONS: VTAM = V1  PARTNER = V1  
IST1680I LOCAL IP ADDRESS 9.67.1.1
IST1680I REMOTE IP ADDRESS 9.67.1.6
IST924I -------------------------------------------------------------
IST2133I INTFNAME: OSA1                INTFTYPE: OSAFDDI
IST2135I   CONNECTIVITY UNSUCCESSFUL    SENSE: ***NA***   PORT: 12000    
IST2137I     1  9.67.1.2                    RTT:     2    
IST2137I     2  9.67.1.21          D-1      RTT:     3    
IST2135I   CONNECTIVITY UNSUCCESSFUL    SENSE: ***NA***   PORT: 12001    
IST2137I     1  9.67.1.2                    RTT:     2    
IST2137I     2  9.67.1.21          D-1      RTT:     3    
IST2135I   CONNECTIVITY UNSUCCESSFUL    SENSE: ***NA***   PORT: 12002    
IST2137I     1  9.67.1.2                    RTT:     2    
IST2137I     2  9.67.1.21          D-1      RTT:     4    
IST2135I   CONNECTIVITY UNSUCCESSFUL    SENSE: ***NA***   PORT: 12003    
IST2137I     1  9.67.1.2                    RTT:     2    
IST2137I     2  9.67.1.21          D-1      RTT:     4    
IST2135I   CONNECTIVITY UNSUCCESSFUL    SENSE: ***NA***   PORT: 12004    
IST2137I     1  9.67.1.2                    RTT:     2    
IST2137I     2  9.67.1.21          D-1      RTT:     3    
IST924I ------------------------------------------------------------- 
IST2133I INTFNAME: OSA2                INTFTYPE: OSAFDDI
IST2134I   CONNECTIVITY SUCCESSFUL                        PORT: 12000
IST2137I     1 9.67.1.3                  RTT:     9  
IST2137I     2 9.67.1.11                 RTT:    14  
IST2137I     3 9.67.1.12                 RTT:    19  
IST2137I     4 9.67.1.4                  RTT:    23   
IST2137I     5 9.67.1.6                  RTT:    27   
IST2134I   CONNECTIVITY SUCCESSFUL                        PORT: 12001
IST2137I     1 9.67.1.3                  RTT:     8
IST2137I     2 9.67.1.11                 RTT:    14  
IST2137I     3 9.67.1.12                 RTT:    17  
IST2137I     4 9.67.1.5                  RTT:    21  
IST2137I     5 9.67.1.6                  RTT:    25   
IST2134I   CONNECTIVITY SUCCESSFUL                        PORT: 12002 
IST2137I     1 9.67.1.3                  RTT:     8
IST2137I     2 9.67.1.11                 RTT:    13  
IST2137I     3 9.67.1.12                 RTT:    18  
IST2137I     4 9.67.1.5                  RTT:    22  
IST2137I     5 9.67.1.6                  RTT:    27   
IST2134I   CONNECTIVITY SUCCESSFUL                        PORT: 12003
IST2137I     1 9.67.1.3                  RTT:     9    
IST2137I     2 9.67.1.11                 RTT:    19  
IST2137I     3 9.67.1.12                 RTT:    22  
IST2137I     4 9.67.1.4                  RTT:    24   
IST2137I     5 9.67.1.6                  RTT:    27   
IST2134I   CONNECTIVITY SUCCESSFUL                        PORT: 12004    
IST2137I     1 9.67.1.3                  RTT:     7 
IST2137I     2 9.67.1.11                 RTT:    11  
IST2137I     3 9.67.1.12                 RTT:    12  
IST2137I     4 9.67.1.4                  RTT:    17   
IST2137I     5 9.67.1.6                  RTT:    23   
IST924I ------------------------------------------------------------- 
IST2139I CONNECTIVITY TEST INFORMATION DISPLAYED FOR 2 OF 2 ROUTES
IST314I END

This example clearly shows that connectivity from HostA to HostB over the OSA1 interface does not exist. The router with IP address 9.67.1.21 is returning an ICMP message to the LDLC probe, which indicates the destination host is unreachable. For this case, investigate this router to determine why it returned this type of ICMP message.

The output also indicates that connectivity from HostA to HostB over the OSA2 interface does exist. Message IST2137I indicates that the route is a 5-hop configuration to the partner host. The display also shows that there are different routes through the IP network to the EE partner. When routing over the OSA2 interface, all five EE ports have successfully contacted the partner HostB with excellent round-trip times (RTT.)