Conference azur::mcc

2758.0. "Multiple OCCURs firing, one event occurred" by ANOSWS::COMFORT (Spent a little time on the hill) Tue Apr 14 1992 11:53

    Hi again -
    
    I orginally wrote this note for the DECnet conference, but thought
    better of that and am now posting same query here for MCC enginerring
    consideration first.  My version is MCC V1.1.
    

    
    I am implementing DECmcc at a customer site and have observed some
    odd things happening with NICE messages when doing event sinking
    from various DEMSAs to the DECmcc system.  MCC has a process called
    MCC_DNA4_EVL which declares itself as a sink on the MCC system.
    (Please correct any terminology faupauxs).  At any rate, the overall
    situation is as follows:
    
    	Two DEMSAs on a LAN in the US routing for area 1, each with a 
    	DDCMP circuit to two DEMSAs on an extended LAN in the UK, each
	routing for a different area. There are around 6 other DEMSAs 
    	in the UK and a dozen various area routers (VAXen, DEMSAs and
    	DECrouter 250s) connected in via 9.6 X25 links and 19.2 and
    	56 kb DDCMP links throughout the world. There are three areas on 
    	the LAN in the US and outside of the DEMSAs in area 1, there are 
    	two area routers in each on the other areas. The MCC system with 
    	the MCC evl process is on the LAN in the US. The main circuit to 
    	the UK is 128 kb and the backup link is 64 kb.
    
    On the two DEMSAs in the US I have enabled the MCC system as a sink
    node and I am passing event 4.17 (area state change). When an area
    state change occurs, I receive multiple messages about the same
    occurance all within a short period of time, usually on the order of 10
    - 20 seconds. In one case, the MCC system received 16 messages for the
    same event, when area 11 became reachable again.  This morning area 14
    went unreachable and the MCC system got four messages (three from one
    DEMSA and one from the other). When area 14 came back, the MCC system
    got two messages, one from each DEMSA.  So my question is : 
    
	Why am I getting multiple messages. Is this because of area 
    	routing updates?
    

    One more piece of info, one DEMSA is an X25 router, the other is
    a DECrouter.
    
    Thanks in advance for information about this query.
    
    Regards,

    Dave Comfort
    
    

    
    So...
    
    Why is it that my query was not addressed, however when the exact
    same problem is entered later in this conference, it was addressed
    almost immediately?
    
    Dave Comfort

It's a conspiracy, Dave.   The development group has standing orders to ignore
all requests from Dave Comfort.


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/doug

    Dave,
    
    It's probably because development work for V1.2 is slowing down and
    developers now have a little bandwidth to monitor the notesfile. I'm
    sure there will be more and more replies from developers over the next
    several weeks.  People who have entered notes a while ago with no
    response should probably reenter them (and probably re-word them as
    well).  As a regular user of this notesfile you should appreciate the
    level effort required to monitor (and moderate) this notesfile.
    
    -Matt.

    
    Thanks. I'm feeling MUUCH better now.  :^)
    

    
    I'd also would like to say that I do understand the large undertaking
    in maintaining the notesfile and all the work the engineers are doing
    and I appreciate it.  Likewise, out in the field, there can be a great
    amount of pressure placed on us digital "representatives".  The product
    is great and all you folks really do a fine job.  Like everyone else I
    sometimes blow off steam and it is not meant to be directed at anyone
    or anything.  At any rate, I will be pursuing  this in the other
    thread.
    
    Peace,
    
    Dave Comfort