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Re: [nv-l] Graphing data using Application builder

To: nv-l@lists.us.ibm.com
Subject: Re: [nv-l] Graphing data using Application builder
From: James Shanks <jshanks@us.ibm.com>
Date: Fri, 15 Apr 2005 13:07:56 -0400
Delivery-date: Fri, 15 Apr 2005 18:08:39 +0100
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Paul, Vladan,

I don't know offhand whether this would work either, but it's probably the
only thing that might.  I'd try defining that variable in
/usr/OV/conf/mib.coerce and see whether you can make it work.  What have
you go to lose?

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and Windows
Tivoli Software / IBM Software Group

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                                       Re: [nv-l] Graphing data using      
             04/15/2005 11:00          Application builder                 
             Please respond to                                             

I dont know if its possible with an Octet String, but NetView does
provide a way to remap the type of variable that is being collected.
There is a file in /usr/OV/conf called mib.coerce. I have never attempted
to use it to remap an Octet String, but I have used it in other cased to
change a Integer to a Counter and visa-versa. It might be worth a try, but
it may not work at all.

Anyone else have any input on this?


Vladan Milosevic wrote:

>James, thanks for the reply...
>I know I am in good hands now...
>I thought that agent sends values marked somehow, but I did not know if
>could be changed.
>IT IS displayString which looks like this one:
>I think that Patrol can graph it since it knows what to expect and it
>changes it to a integer.
>I am quite sure that BMC did it on purpose, since the monitoring station
>does just that, and all the numeric values are presented as strings. Since
>you have mentioned it, is there a way I could take this info and convert
>string value to integer and then use it again?
>I have tried collecting it, and although it looks like number, I get
>complains about nothing to graph...
>Sorry about my poor explanation of the problem, but you got it right,
>-----Original Message-----
>From: owner-nv-l@lists.us.ibm.com [mailto:owner-nv-l@lists.us.ibm.com] On
>Behalf Of James Shanks
>Sent: Friday, April 15, 2005 4:01 PM
>To: nv-l@lists.us.ibm.com
>Subject: Re: [nv-l] Graphing data using Application builder
>I don't follow what you are saying here at all.   How can you, or BMC, be
>graphing anything other than a numeric value?
>A Display String is a textual convention for a particular kind of octet
>string, in this case printable ASCII characters. It is sent by an agent as
>data type x'04', which is the BER encoding for an octet string.  All SNMP
>data is preceded by its data type and length so that the receiver knows
>precisely what it is getting.
>Now the only thing you can collect and graph in NetView are numeric
>integers,  counters, gauge values.  Things that vary numerically over
>That's all.
>So are you saying that this BMC patrol MIB is incorrect and that what they
>are calling a Display String is really something else, a numeric value of
>some kind?  Then you would have to change the MIB and reload it just to
>try to get us to collect on it.  You said you weren't sure that even makes
>sense.  Well, as far as I can see, that's the only thing that does, since
>you cannot graph a string of printable ASCII characters as a rate of
>But this would be a workaround only if the MIB really is in error and the
>Patrol agent is really sending some kind of numeric data, encoded as x'02'
>integer, or x'41' counter, or x'42' gauge.  If it is really sending  type
>x'04' octet string, then it is highly likely that the MIB collector isn't
>going to know what to do with that kind of data, and will just  error out.
>don't know that for a fact, so you are welcome to try this if you like,
>I am sorely puzzled by your description of the issue here.
>James Shanks
>Level 3 Support  for Tivoli NetView for UNIX and Windows
>Tivoli Software / IBM Software Group

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