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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

6318.0. "Dictionary data types, and max data value" by COMICS::PRICEC (I had a life, then I joined the CSC) Fri Jun 02 1995 14:03

    
    
    
    
    
    
    I'm looking at a problem where somebody is using the RMON mib to talk
    to a NAT ethermonitor, and is graphing the HOSTINOCTETS values of one
    of the hosts.
    
    
    The graph is showing  inconsistent values, and appears to drop down to
    an incorrect value after a period of time.
    
    I've looked at the definition in the data dictionary which shows ..
    
    DAP> show Attribute HOSTINOCTETS Definition VALUE_LENGTH
    
       Definition Name = VALUE_LENGTH
       Type = L   Length = 4   Count = 1   Defined = TRUE   Class = S
       value[1] = 4
    
	
    I presume  the "Type" field means it is a longword, hence the Length of
    4 , this means that MCC can  only accept a value for this field of
    4096Meg, which for an ethernet device is not very realistic. I presume
    that when this field receives an SNMP message specifiying a 5 byte
    field, MCC just reads the lowest 4 bytes, thus giving the impression
    that the count has "wrapped" back down to zero.
    
    
    
    Could somebody confirm what the data type "L" is , and whether it would
    be feasible to modify the dictionary to accept a QU type (Quad word).
    
    
    Even better, could somebody point me to a reference guide for the MCC
    data type definitions.
    
    
    
    
    
    	Regards, Conrad Price
    
    	UK CSC
T.RTitleUserPersonal
Name		DateLines
6318.1Graphing 'Quad Word' datasAZUR::GACHOTTue Jun 06 1995 11:3936
Hi Conrad,


	Could you please let me know which version of DECmcc
	you are running, and on which entities (Class and subclass...).

	
	I corrected problems in the Iconic_map - Graphic module For
	Quad Word datas. A Patch is available.

	Should I suggest you to take this patch and let me know if it
	solved the problem.


	For V1.4:
	-------

	TAEC::USER4:[MCC_PUBLIC.MCC_V140_PATCHES.ICONIC_MAP.FIX07]

		MCC_ICONIC_MAP_PM.EXE
		RELEASE_NOTES_ICONIC_MAP_FIX_07.TXT

	For V1.3:
	-------

	TAEC::USER4:[MCC_PUBLIC.MCC_V130_PATCHES.ICONIC_MAP.FIX07]

		MCC_ICONIC_MAP_PM.EXE
		RELEASE_NOTES_ICONIC_MAP_FIX_07.TXT



Hope it helps,


			-Erik Gachot.
6318.2Does the graph bypass the dictionary ?COMICS::PRICECI had a life, then I joined the CSCWed Jun 07 1995 15:2143
    
    
    Hi Eric,
    
    
    
    	I'm using MCC V1.4 on my test system here, and my dictionary
    definition for
    
    
    snmp rmon hosts hosttable attribute HOSTINOCTETS definition
    VALUE_LENGTH
    
    
       Definition Name = VALUE_LENGTH
       Type = L   Length = 4   Count = 1   Defined = TRUE   Class = S
       value[1] = 4
    
    and 
    VALUE_DATA_TYPE
    
       Definition Name = VALUE_DATA_TYPE
       Type = L   Length = 4   Count = 1   Defined = TRUE   Class = S
       value[1] = 38
    
    
    This implies that  the dictionary will only accept a longword , I
    assume that's what Type = L means.
    
    
    
    I know that the Iconic map needs an entry in the dictionary to allow
    you to select certain graphical entities. Does this Iconic map fix,
    bypass the dictionry when graphing this data ?
    
    
    
    My customer is on V1.3 , but his dictionary is the same as mine. I'll
    pull the V1.3 patch and ask the customer to try it.
    
    
    
    	Regards, Conrad
6318.3Dictionary ProblemAZUR::GACHOTWed Jun 07 1995 15:5825
Hi Conrad,

	You are right, the problem that I corrected was for
	Node5 HDLC links dataoctetsreceived dataoctetssent.
	I checked in the Dictionnary and the definition is 
	'64-bit Counter'.

	So in your case we have to update the Dictionnary.

	The customer also need the fix that I made for graphing data
	coded under 64-bit.

	If you install the fix without updating the dictionnary 
	you will get the same result as now. 
  
	We will work on this dictionnary problem, and let you know
	when a fix is available.

	If it's possible, could you please log an IPMT case, it's
	our official customer support.

Many thanks,
Regards,

		-Erik.
6318.4ThanksCOMICS::PRICECI had a life, then I joined the CSCTue Jun 13 1995 18:5913
    
    
    
    Thanks Eric,
    	
    	I'll IPMT it today or tomorrow. I don't think there's any rush as I
    wrote an alarm rule for the customer to mail them when the counter
    wraps so they can be warned when their graph looks a little unusual.
    
    
    
    		Regards, Conrad