[mrtg] Re: Monitor CRC & Framing Errors

[hdevito at qwest.net]

I can see the appropriate figures,  I just can't seem to make MRTG collect
the correct data.  this is the first setup of MRTG I have done.  I'm kinda
confused of what my config should look like.  This is what I have,  Does it
look correct?  This is only one serial port of course.

Target[192.100.108.1_2]:
1.3.6.1.2.1.16.1.1.1.8/192.100.108.1&1.3.6.1.2.1.16.1.1.1.8/192.100.108.1:co
mmunityName at 192.100.108.1

YLegend[192.100.108.1_2]: Errors

ShortLegend[192.100.108.1_2]: Errors

MaxBytes[192.100.108.1_2]: 193000

Options[192.100.108.1_2]: nopercent, unknaszero

Legend1[192.100.108.1_2]: CRC Align Errors

Legend2[192.100.108.1_2]: CRC Align Errors

Legend3[192.100.108.1_2]: Max value per interval on graph

Legend4[192.100.108.1_2]: .

LegendI[192.100.108.1_2]: CRC Align Errors

LegendO[192.100.108.1_2]: CRC Align Errors

Title[192.100.108.1_2]: South Side Serial 1

PageTop[192.100.108.1_2]: <H1>South Side Serial 1</H1>

Colours[192.100.108.1_2]: GREEN#00eb0c,BLUE#0000ff,GRAY#AAAAAA,VIOLET#ff00ff

WithPeak[192.100.108.1_2]: ymw




----- Original Message ----- 
From: "Pete Templin" <petelists at templin.org>
To: <hdevito at qwest.net>
Cc: <mrtg at list.ee.ethz.ch>
Sent: Saturday, June 05, 2004 11:45 AM
Subject: Re: [mrtg] Monitor CRC & Framing Errors


> hdevito at qwest.net wrote:
> > Hi,  I wuld like to monitor CRC and Framing errors on the serial
> > ports of 1720 routers.  I have 11 1720's and 21 Serial ports (T1's)
> > that I need to monitor.  It would be great to just to browse to a
> > webpage and check for errors rather than log in to each router.  I
> > tried using the CRC template off somix.com.  MRTG creates the graphs
> > and looks like it's querying the routers, but no data is displayed.
> > Anyone that could help would be greatly appreciated.  Thanks in
> > advance.
>
> YMMV, but the DS1 MIB should be available on these units, or at least
> something similar.  All of the error counters are available through this
> MIB.  Can you see appropriate figures if you poll the router manually?
>
> A few additional notes on this topic: because MRTG might not take the
> same amount of time to process its targets on unique runs, your timing
> may not end up right at 300 second intervals, and it's next to
> impossible to sync up with the 15-minute intervals where DS1 devices
> keep these statistics.  As such, I monitor both the current interval and
> the previous interval at the default five minute interval, knowing that
> a few caveats apply:
>
> 1) I will "miss" the last 0-299 seconds in each 15 minute interval, and
> capture less than 300 seconds during the beginning of the new 15 minute
> interval, on one poll every three.
> 2) I will capture the errors missed in #1 by polling the previous
> interval, but will get the same results for three polls in a row (since
> the previous interval becomes the previous previous interval every
> fifteen minutes).
>
> I use threshold monitoring to capture moderate and high levels.  I have
> a simple script that treats the "Min" and "Max" thresholds as "info" and
> "alert" (i.e. the safe zone is below the info and alert levels, NOT in
> between the Min and Max levels as the default logic assumes).
>
> Now I just need to develop a way to integrate some of my automated page
> generation tools with RRDTool and a companion graph-building CGI, so I
> can get the CPU load down on my poor monitoring box...
>
> pt
>

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