[mrtg] Re: ping probe questions
Paul C. Williamson
pwilliamson at mandtbank.com
Wed Jan 2 23:07:08 MET 2002
It's a standalone tool. It requires RRDTool, fping, speedyCGI,
a webserver, and Perl. Tobi says 5.6.1, but I've got it running
fine with 5.6.0.
Once you get it running, similar to MRTG, you'll wonder how you
did any troubleshooting without this tool running, gathering stats all
the time.
Paul
>>> Jake Colman <colman at ppllc.com> 01/02/02 04:53PM >>>
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]: % loss: LegendO[10.20.1.136.loss]:
PCW> % 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]: % loss: LegendO[10.20.2.137.loss]:
PCW> % 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
Harborside Financial Center Fax: (201) 946-0320
902 Plaza Two E-mail: colman at ppllc.com
Jersey City, NJ 07311 www.principiapartners.com
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