Your analysis certainly confirms my original thoughts.
I ran STG (SNMP Traffic Grapher) version 1.4.5 to monitor the router overnight
and its interesting that it does not show any drop-outs.
Does anyone know how STG handles the counter wrap?
Regards,
Nick Earle
Alex van den
Bogaerdt To: [EMAIL PROTECTED]
<[EMAIL PROTECTED] cc: (bcc: Nick
Earle/London/GB/BAT)
p.het.net> Subject: [mrtg] Re: Unexpected
drop-outs in graphs
16/06/2003
17:30
On Mon, Jun 16, 2003 at 05:06:12PM +0100, Nick Earle wrote:
>
> I'm having a problem with MRTG which is resulting in drop-outs in my graphs.
> The drop-out appear to occur after a specific amount of traffic has passed,
> as the area between each drop-out appears to be the same. Please take a look
> at the attached graph to see what I mean.
To me it appears this happens after 2^32 octets.
Look attime 12 to 20:
12 to 20: roughly 8 hours at 1200 Kbps: 8*3600*1200*1000/8 = 4320000000
20 to 01: roughly 5 hours at 1800 Kbps: 5*3600*1800*1000/8 = 4050000000
11 to 15:30 : roughly 4.5 hours at 2000 Kbps: 4.5*3500*2000*1000/8 = 3937500000
All these numbers are close to 2^32 which is 4294967296.
This doesn't help much but at least the "specific amount of traffic" can
now be guessed to be 2^32 octets.
Could it be that you are using 64-bit counters that wrap at 2^32 ?
> Confidentiality Notice: The information in this document and
> attachments is confidential and may also be legally privileged.
> It is intended only for the use of the named recipient. Internet
Oops. I'm sorry. I'm not the named recipient.
> communications are not secure and therefore British American
> Tobacco does not accept legal responsibility for the contents of
> this message. If you are not the intended recipient,please notify us
> immediately and then delete this document. Do not disclose the
> contents of this document to any other person, nor take any copies.
> Violation of this notice may be unlawful.
Oops, the mrtg mailing list made copies. Are you sure you have the
right to subscribe to mailing lists?
--
Unsubscribe mailto:[EMAIL PROTECTED]
Archive http://www.ee.ethz.ch/~slist/mrtg
FAQ http://faq.mrtg.org Homepage http://www.mrtg.org
WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
Confidentiality Notice: The information in this document and
attachments is confidential and may also be legally privileged.
It is intended only for the use of the named recipient. Internet
communications are not secure and therefore British American
Tobacco does not accept legal responsibility for the contents of
this message. If you are not the intended recipient,please notify us
immediately and then delete this document. Do not disclose the
contents of this document to any other person, nor take any copies.
Violation of this notice may be unlawful.
--
Unsubscribe mailto:[EMAIL PROTECTED]
Archive http://www.ee.ethz.ch/~slist/mrtg
FAQ http://faq.mrtg.org Homepage http://www.mrtg.org
WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
