[mrtg] Re: Monitoring SAN containing McData switches

[Daihl, Richard L (Rick)]

I attached a summary page for a port having difficulties.  The daily
graph had values that were outside the window of possibilities for a 2
gig port.  Yet the weekly graph had nothing.  In fact the port has no
traffic on it and hasn't for awhile.

I've figured out how to build the config files.  I have to do it
manually.  Each McData switch's MIB string is unique.  There is
xxx.xxx.xxx.xxx in the  middle of the string that is different on each
switch.  So the first thing I do is snmpdump the switch and get that
uniqueness.  I have a shell script that I plug that into that builds the
config file that MRTG expects.

The problem described above happens kind of randomly around the SAN.  I
haven't been able to put my finger on it yet.  

I run MRTG using RRD and use 14all.cgi to redraw on demand from the .rrd
files.   That output is were I see the problem.   So the problem could
be in the data in the .rrd file or how 14all.cgi is redrawing from it.

Thanks in advance for any input/suggestions.

-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]
On Behalf Of Eric Brander
Sent: Monday, October 09, 2006 12:25 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Monitoring SAN containing McData switches

Daihl, Richard L (Rick) wrote:
> Does anyone have any ideas about what is going here?=20
>
>
>   

Richard,

I'm not sure of your exact problem but when I was monitoring some McData

2 gig ports I couldn't get any of the normal counters to work. I had to 
use the 4-byte frame counter and then do some math in MRTG. I'm afraid 
that was too long ago for me to recall the exact config and I don't have

that set-up anymore but maybe this will help you go down that path.

HTH,

Eric Brander

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