[mrtg] Re: ping probe questions

Wed Jan 2 22:53:48 MET 2002

Paul,

Is smokeping used together with mrtg for graphing?  Or is it a standalone
tool?

...Jake

>>>>> "PCW" == Paul C Williamson <pwilliamson at mandtbank.com> writes:

    PCW> If you are up to it, try smokeping.  It is really neat, and quite
    PCW> useful.  ping-probe is good for min/max rtt, but smokeping is great
    PCW> for measuring system load and response indirectly as well as rtt.

    PCW> Paul

    >>>> "Curtis Kline" <ckline at housing.ucsb.edu> 01/02/02 03:56PM >>>

    PCW> Well, after a reality check from Paul (thanks), I believe I've about
    PCW> got this figured out... I needed a "-p loss/loss" in my target line.
    PCW> Here's my latest config excerpt, that seems to be working:

    PCW> # monitor packet loss
    PCW> Title[10.20.1.136.loss]: Packet Loss Analysis
    PCW> PageTop[10.20.1.136.loss]: <H1>Packet Loss Analysis</H1>
    PCW> MaxBytes[10.20.1.136.loss]: 100 AbsMax[10.20.1.136.loss]: 101
    PCW> Options[10.20.1.136.loss]: gauge, withzeroes
    PCW> Target[10.20.1.136.loss]: `/usr/local/mrtg-2/bin/mrtg-ping-probe -k
    PCW> 50 -p loss/loss 10.20.1.136` YLegend[10.20.1.136.loss]: % Packet
    PCW> Loss ShortLegend[10.20.1.136.loss]: % Legend1[10.20.1.136.loss]: %
    PCW> Packet Loss Legend2[10.20.1.136.loss]: % Packet Loss
    PCW> Legend3[10.20.1.136.loss]: Maximal 5 Minute % Packet Loss
    PCW> Legend4[10.20.1.136.loss]: Maximal 5 Minute % Packet Loss
    PCW> LegendI[10.20.1.136.loss]: &nbsp;% loss: LegendO[10.20.1.136.loss]:
    PCW> &nbsp;% loss:

    PCW> It is now obvious to me that both the green area and the blue line
    PCW> are now graphing the same thing: Packet Loss.

    PCW> I decided to ping 50 times each round, although that does take some
    PCW> time.

    PCW> Curtis

    PCW> -----Original Message----- From: Curtis Kline Sent: Wednesday,
    PCW> January 02, 2002 10:58 AM To: Paul C. Williamson;
    PCW> mrtg at list.ee.ethz.ch Subject: [mrtg] Re: ping probe questions

    PCW> Hrm, from the ping-probe website (http://www.pwo.de) I gather that
    PCW> packet loss was introduced on 2001/01/06 with release 2.0.0.  I have
    PCW> version 2.0.2 dated 2001/01/21.

    PCW> My packet loss config is as follows:

    PCW> # monitor packet loss
    PCW> Title[10.20.2.137.loss]: Packet Loss Analysis
    PCW> PageTop[10.20.2.137.loss]: <H1>Packet Loss Analysis</H1>
    PCW> MaxBytes[10.20.2.137.loss]: 100 AbsMax[10.20.2.137.loss]: 101
    PCW> WithPeak[10.20.2.137.loss]: ymwd Options[10.20.2.137.loss]: gauge
    PCW> Target[10.20.2.137.loss]: `/usr/local/mrtg-2/bin/mrtg-ping-probe
    PCW> 10.20.2.137` Unscaled[10.20.2.137.loss]: dwmy
    PCW> YLegend[10.20.2.137.loss]: % Packet Loss
    PCW> ShortLegend[10.20.2.137.loss]: % Legend1[10.20.2.137.loss]: % Packet
    PCW> Loss Legend2[10.20.2.137.loss]: % Packet Loss
    PCW> Legend3[10.20.2.137.loss]: Maximal 5 Minute % Packet Loss
    PCW> Legend4[10.20.2.137.loss]: Maximal 5 Minute % Packet Loss
    PCW> LegendI[10.20.2.137.loss]: &nbsp;% loss: LegendO[10.20.2.137.loss]:
    PCW> &nbsp;% loss:

    PCW> -----Original Message----- From: Paul C. Williamson
    PCW> [mailto:pwilliamson at mandtbank.com] Sent: Wednesday, January 02, 2002
    PCW> 10:49 AM To: Curtis Kline; mrtg at list.ee.ethz.ch Subject: Re: [mrtg]
    PCW> ping probe questions

    PCW> For the first question...

    PCW> There should have been a config supplied with the script.  If not, I
    PCW> can

    PCW> post mine.  FWIW, the green is MAX RTT and the blue is MIN RTT.

    PCW> For the second question, I didn't know ping-probe did packet loss.
    PCW> The version I have is 2.2, dated 2001/01/07.  Is there a newer
    PCW> version that reports packet loss?

    PCW> Paul

    >>>> "Curtis Kline" <ckline at housing.ucsb.edu> 01/02/02 01:40PM >>>

    PCW> Please forgive me if these questions have already been answered on
    PCW> this list, I have been unable to find them in the archives.

    PCW> With regard to the current version of ping probe, I have a couple
    PCW> questions:

    PCW> 1.  What is graphed on the blue line vs. the green shaded area?  The
    PCW> values are wildly different, but I can't seem to determine what each
    PCW> represents.

    PCW> 2.  I am trying to graph packet loss between my mrtg host and some
    PCW>     cable
    PCW> modems a couple hops away. When I continuously ping one of the
    PCW> modems from the Linux shell on the mrtg host I get 0% packet loss
    PCW> over about a 5 minute period. However, ping probe reports 35% loss
    PCW> average on the green shaded area and 6% loss average on the blue
    PCW> line.  In some cases, my max loss on the green shaded area is
    PCW> 101%.. that seems unlikely.

    PCW> Can anyone provide some clue as to why this might be the case?

    PCW> Thanks in advance, Curtis

    PCW> ckline at housing.ucsb.edu

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-- 
Jake Colman                     

Principia Partners LLC                  Phone: (201) 946-0300
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