[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference azur::mcc

Title:DECmcc user notes file. Does not replace IPMT.
Notice:Use IPMT for problems. Newsletter location in note 6187
Moderator:TAEC::BEROUD
Created:Mon Aug 21 1989
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6497
Total number of notes:27359

1906.0. "circuit alarms" by BRSTR1::MERTENS (yves) Tue Dec 10 1991 11:15

    
    Problem: customer sets 3 alarms to check the status change of a circuit
             this results  in phantom exceptions with a lot of entries in the 
             batch queue and after a while it stops the queue 
    
    
    alarm rule 1:initial check
    --------------------------
      create mcc 0 alarms rule circuit_sobe_ternat_initstate , in domain =
    sobe
    
        expression   =(node4 xra014 circuit sobe-ternat-0 substate <> none)
        procedure    =mcc_common:mcc_alarms_log.com
        exception handler = mcc_common:mcc_alarms_log_exception
        category          = "circuit problem"
        perceived severity = critical
        queue= mcc$batch
        parameter = sys$sysroot:[mcc.log]mcc_circuit_alarms.log
        in domain = sobe
    
   alarm rule 2: router reachability
   ------------
      create mcc 0 alarms rule reachability_xrc014 , in domain =
    sobe
    
        expression   =(node4 xrc014 state <> on at every 00:01:00)
        procedure    =mcc_common:mcc_alarms_log.com
        exception handler = mcc_common:mcc_alarms_log_exception
        category          = "node unreachable"
        perceived severity = critical
        queue= mcc$batch
        parameter = sys$sysroot:[mcc.log]mcc_circuit_alarms.log
        in domain = sobe
   alarm rule 3: resheduled check
  ----------------
      create mcc 0 alarms rule circuit_sobe_ternat_substate , in domain =
    sobe
    
        expression   =(change_of(node4 xra014 circuit sobe-ternat-0
          substate none,*
         at every 00:01:00)
        procedure    =mcc_common:mcc_alarms_log.com
        exception handler = mcc_common:mcc_alarms_log_exception
        category          = "circuit problem"
        perceived severity = critical
        queue= mcc$batch
        parameter = sys$sysroot:[mcc.log]mcc_circuit_alarms.log
        in domain = sobe
      
  QUESTIONS: Are this the correct rules to check the status of a circuit?
             Is their an explanation for phantom exceptions ?
             In the queue there are three entries for the same rule with a
             time difference of 10 sec !!!!
             Why is the queue stopped after a while?
             Is there a relation with 2-16 point 5 in the release notes
             V1.1 ?
    
    I hope will get some replies because it's urgent .
    
     Yves
    
T.RTitleUserPersonal
Name
DateLines
1906.1TOOK::R_SPENCENets don't fail me now...Tue Dec 10 1991 12:3621
    Are these X.25 circuits? If so, this won't work as X.25 isn't supported
    by the NODE4 AM.
    
    This would cause the rule to fail with an exception and will generate
    (in your case) 3 batch jobs per minute.
    If the jobs take more than 20 seconds to complete, then things are
    going to start backing up in the queue (depending on how your queue is
    set up).
    
    Look in the batch job log file and you should see the reason for the
    error. Also, look for some files of the form
    	MCC_ALARMS_DATA_10024324.DAT;1
    and type it out. Look at the line labled EVIDENCE: to see what
    happened.
    
    
    I do not know why VMS is stopping the queue. Perhaps you ran out of
    disk space?
    
    
    s/rob
1906.2Again why is X.25 not supported ?CLARID::PATELWe'll get it right on the nightTue Dec 10 1991 13:5712
    May be not the place or time for it ... ar what the heck
    
    *Flame on*
    If I have a Phase 4 node   I know it supports X.25 er go
    If I have a Phase 4 mcc AM I know it supports X.25 OR DO I
    *Flame off*
    
    Similar discussions took place during PhV to not support X.25, you have
    to take code out.
    
    I know this has been discused befor but why is X.25 not supported, X.25
    is a growing market  -- comments form PM please
1906.3There is some X.25 supportTOOK::R_SPENCENets don't fail me now...Tue Dec 10 1991 14:068
    Maybe I was not completely correct... Sorry.
    
    According to the DECmcc DECnet Phase IV AM Use manual, page 2-7,
    the syntax for an X.25 circuit says it's name starts with "X25-".
    
    Maybe this will help you.
    
    s/rob
1906.4circuit alarmsBRSTR1::MERTENSyvesTue Dec 10 1991 14:3218
    Already thanks for the info.
    
    My customer is using an X25ROUTER with ddcmp links and also x25 links.
    So, the reason he receives the phanthom exceptions is caused by the rule
    which is checking the x25 circuit.
    Is it true that with the class node4 am we can't manage PSI v4.3 (ncp
    driven)?
    Is it true that with the class node am we can manage PSI v5.0 (ncl
    driven)?
    Can somebody clarify this ?
    If we can manage the x25 circuit this is only valable for DLM and
    PVC,correct?
    
    I need more explanation on this
    
    Yves7
    
    
1906.5Regrettably confirmedTOOK::MATTHEWSTue Dec 10 1991 17:1622
    I am sorry to confirm what you already know. DNA4 AM does not support
    the x.25 module entity. DNA4 AM only supports DLM (data link mapping).
    DNA5 AM fully supports X.25. 
    
    Regrettably, no one has ever seen fit to fund the DNA4 AM to support
    the x.25 module but we were given funding for it on x.25. I put a note
    in the notes file over 6 months ago asking for someone who thought
    this was important enough to fund to come forward. NO ONE answered.
    The decision was made at the V1.0 timeframe, remade for V1.1, and
    for V1.2.
    
    The DECnet group in theory is supposed to pick up the DNA4 AM after
    the completion of V1.2. In actuality, they are also short on funding
    and aren't likely to do much with it. 
    
    wally the development manager for dna4 am
    
    Flaming will not resolve this issue. If it is critical for your
    customers then I suggest making your case to product management
    and see if someone in DEC will fund the development.
    
    
1906.6clarification of previous typoTOOK::MATTHEWSTue Dec 10 1991 17:172
    oops! on the last message, It should say that we were funded on
    DNA5 AM side only.
1906.7circuit alarm /x25BRSTR1::MERTENSyvesWed Dec 11 1991 04:387
    To come back on my first entry .If my customer has setup a DLM circuit,
    and this isn't a circuit starting with X25- it will provide exceptions.
    Is this true or are the exceptions caused by x25router...?
    Has somebody an other method than my customer has to check the state of
    the circuit?
    
      Yves