Graphing multiple value Hex-STRING SNMP output?

[tdjb]

I am a new rrdtool/cacti user and I have a feeling the solution to this is way over my head (if even possible).
I am pulling data from an OID that has multiple hex values that need to be converted to decimal and graphed. Is this possible?

Here is a short version of what the output looks like from a snmpget on this OID:

"40 47 3C 40 38 3A 47 43 3E 48 4A 4D 55 46 52 43
42 3C 4A 47 4A 47 47 44 3D 47 40 4B 41 44 44 42
36 3D 3A 3E 37 41 41 3C 3C 33 37 35 36 3A 35 34
32 36 33 36 33 36 38 3C 37 3E 42 3E 3B 3E 39 3B
38 36 39 38 2F 34 3A 33 41 37 37 39 3D 38 39 32"

The entire string is 48 rows X 16 columns.
So what I'm trying to do is take all ~768 values and plot them on a graph, then connect the dots to make a nice line graph. Am I asking for more then cacti can do?
As I said, I'm very new to this software but if you have any suggestions I'm all ears.

Thanks in advance.

[TheWitness]

So, do you know the OID for this value? If so, open a command shell and perform the following command:

snmpget -c <your_community> -v <your_version> <your_host> <your_oid>

If it comes back hex, then do the following:

if csh:

setenv MIBS "ALL"

if sh/bash/ksh

set MIBS="ALL"; export MIBS

if Windows

set MIBS="All"

then:

snmpget -c <your_community> -v <your_version> <your_host> <your_oid>

Again. See if the output changes.

TheWitness

[tdjb]

No, no output changes.

When I first posted I had the MIB file "loaded" so I was not using the full numeric OID. I went ahead and took the MIB file out and tried the snmpget with the full numeric OID and got the same output.

[TheWitness]

Can you do the same procedure and change MIBS=All to MIBS=None. Net-snmp will complain, but I gave you the incorrect procedure. Sorry, I'm a bit distracted at the moment.

TheWitness

[tdjb]

Can you do the same procedure and change MIBS=All to MIBS=None. Net-snmp will complain, but I gave you the incorrect procedure. Sorry, I'm a bit distracted at the moment.

TheWitness

No problem, I appreciate the help.

I still get the same output though, even with MIBS=none. I know it's not using the MIB though because if I try to use a non-numeric OID I get an error.
So with or without the MIB the output is still the same.

[tdjb]

Ok, so redo time

Is there a way to just plot data into an rrd and have rrtool generate a graph? I know this is not what it's made for but I would like to only use one program and also add this data to Cacti.
Right now I am using jplot to create the graph. I have a text file with three columns that I feed into jplot and it creates the graph based on those values.

Column one is the X value
Column two is the first Y value
Column three is the second Y value
This is what the data looks like in the file:

2.03906 57 -22
2.07812 51 -22
2.11719 50 -21
etc, etc.

So I guess my question is, can I take this data file (which is created by my script) and have rrdtool generate the graph for it?

[TheWitness]

Sure, goto www.rrdtool.org and lookup the reference information on creating and updating RRD files.

TheWitness

[tdjb]

Sure, goto www.rrdtool.org and lookup the reference information on creating and updating RRD files.

TheWitness

Ok, I'll dig deeper. I've been hunting the internet all day but haven't found a solution. Problem seems to be this data is not based on time, I have the X values already.
Thanks again.