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Conference abbott::teamlinks_windows

Title:TeamLinks for Windows
Notice:Kit and ECO locations: See replies to note 8.o note 8.
Moderator:ORION::chayna.zko.dec.com::tamara::eppesAN
Created:Mon Aug 28 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2238
Total number of notes:9650

1980.0. "Problesm w/spontaneous disconnects see details..." by OASS::GIANNETTI_D () Fri Feb 07 1997 11:13

Sequence of events and communication with customer...

Customer has problem with intermittent connections being lost               
whether they be DECnet or IP.                                                   
                                                                                
Customer has TeamLinks 2.1-5 or TeamLinks 2.5                               
Customer has MailWorks 1.3a-3                                                  
Ucx 4.0                                                                        
VMS 6.2 on ALPHA  2100                                                         
License on Alpha Units 100                                                     

Customer says they have been running TEamLinks for a number of                 
years and now they are experiencing a number of spontaneous                    
disconnects.                                                                   
                                                                                
Does not matter whether DECnet or TCP/IP (using 32bit stack in                 
WFW3.11)                                                                       
                                                                                
Customer is going to try to get cfcdebug.log.  Does not matter if on         
same router (one PC may have prob, one may not).  Says hardware is all 
similar (DEC ethernet cards).                              
                                                                                
After looking deeper into the problem found that there were some 
systems with duplicate decnet addresses on the PC's.  The PC's have 
dual stacks.  Even on the "IP" systems it appears that the duplication 
in DECnet addresses caused the problem.  Once the duplication was              
addressed - no more problem.                                                   
                                                                  
I can understand the DECnet systems being affected but how does this
duplication of DECnet addres affect a user who is connection to TeamLinks
via TCP/IP?

Any takers?

Debbie Giannetti              
T.RTitleUserPersonal
Name
DateLines
1980.1Duplicate IP addresses too?MANANA::FLANAGANThu Mar 06 1997 15:356
    Debbie,
    
      Unless they had duplicate IP addresses I don't see how IP users
    would be affected either.
    
      / Peter
1980.2Does this make any sense at all?AIMTEC::GIANNETTI_DMon Mar 17 1997 14:4211
    I have another customer who is getting the xs errors and the
    sub or function not defined error.  The reason I am adding this
    reply here is that she found out that the affected Windows 95 systems
    that were giving these errors also had dual stacks loaded and they
    turned out to all have duplicate decnet addresses (even though they
    were using IP for TeamLinks and for access to the server) once they
    addressed the duplicate decnet addresses all was well.
    
    What could be going on here?
    
    Debbie Giannetti 
1980.3A suggestionWOTVAX::16.194.208.3::warder.reo.dec.com::sharkeyaWho am I now ?Tue Mar 18 1997 04:485
I bet its the ethernet address being changed to an AA-00... number. That 
would affect all transports.

Alan

1980.4Station address or ethernet address?AIMTEC::GIANNETTI_DMon Mar 24 1997 13:2812
    Alan,
    
    Do you mean that the "station" address would be duplicated as well?
    
    How would this cause the sub or function not defined or the spontaneous
    disconnects?
    
    Enlighten me.
    
    Debbie Giannetti 
    
    
1980.5Could it be a wildcard msg to all stacks?MANANA::FLANAGANTue Apr 15 1997 17:4123
    Debbie,
    
       I suspect this is a router question -- ethernet level protocol is
    well below the winsock level I'm used to.  You probably should ask
    someone in the pathworks group about this. I can only speculate.
    
       
       I *guess* that the machine is still announcing itself as being
    alive and at the given address even if the DECnet transport isn't
    being used. If the transport is installed it is probably occassionally
    broadcasting its address.  When the router notices two machines
    with different ethernet addresses claiming to be the same it
    probably sends a message to one or both saying "you have a twin out
    there".  Perhaps the message is being received by all the transports
    on the machine because it is a wildcard message and the IP stack
    receives it and shuts down?
    
      If you find the real answer I'd be happy to be corrected and
    enlighted.
    
      / Peter