[mrtg] Re: Graphed flatlined...

[Ambrose Chiu]

The reason for the flatline is due to the fact that MRTG didn't get any
values during time that the graph showed flatline. When MRTG doesn't get
a value such as when the link is down, MRTG will take the last value and
use it for that period of time that the link was down creating the
flatline!! It doesn't use a 0 value because it would screw up the
Monthly and Yearly graph since it takes averages from Daily and Weekly
graphs!!

Hope this helps!!

Ambrose Chiu


> -----Original Message-----
> From:	Justin Shore [SMTP:macdaddy at vinnie.ksu.ksu.edu]
> Sent:	Thursday, November 11, 1999 3:56 PM
> To:	mrtg at list.ee.ethz.ch
> Subject:	[mrtg] Graphed flatlined...
> 
> 	Can anyone tell me what would cause my graphs to flatline 
> over an extended period of time?  Here the page that shows it:
> 
> http://vinnie.ksu.ksu.edu/stats/sktc/sktc_dsu.html
> 
> My .log seems to be ok.  Here's an excerpt:
> 
> 942353101 3636061607 3569945701
> 942353101 42115 8681 42115 8681
> 942352803 44321 8760 44321 8760
> 942352800 44296 8815 44321 17136
> 942352500 40712 17064 40715 17136
> 942352200 40270 6471 40279 8348
> 942351900 37826 8335 38386 8348
> 942351600 38384 6483 38386 6485
> 942351300 38238 6316 42547 6320
> 942351000 42527 5878 42547 6880
> 942350700 40594 6882 43338 7256
> 942350400 43326 7244 43338 7256
> 942350100 41650 5506 43125 7391
> 942349800 43123 7397 43125 8315
> 942349500 42957 8311 45522 8315
> 942349200 45530 7864 46841 10475
> 
> 
> I've removed the related gifs and let them be regenerated.  I'm not 
> getting any error back either.  I've also traced through it by hand 
> and verified the #'s so it must be MRTG-related.  Any ideas for me?
> 
> 	On another note, I keep getting this from one of 4 terminal 
> servers I setup MRTG to monitor:
> 
> [www at Vinnie sktc]$ get-sktc-modempool-206.53.112.6
> Timeout: No Response from XXX.53.112.6.
> SNMP Error:
> no response received
> SNMPv1_Session (remote host: "XXX.53.112.6" [XXX.53.112.6].161
>                    community: "has_been_cut"
>                   request ID: 59740691
>                  PDU bufsize: 8000 bytes
>                      timeout: 2s
>                      retries: 5
>                      backoff: 1)
> SNMPGET Problem for sysUptime sysName on has_been_cut at XXX.53.112.6
> 
> 
> The 2nd or 3rd automatic attempt finally gets through.  Is this 
> something I should be concerned with?  Thanks!
> 
> Justin
> 
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