[mrtg] Re: Counter wrapping?

[Barry_Young at interliant.com]

Alex et al,

>From your explanation (thanks for the simplicity), counter wraps will occur
every 4.2Gbs of data transferred.

This could be the cause of my problems when monitoring a Gigabit fibre
interface to our backup server, for which I am getting very strange graphs
out of mrtg.  Because of the nature of streaming backups, the traffic rate
is continually high therefore I am making the assumption that if we exceed
14Mb/s, we will experience a counter wrap within mrtg's 5 minute polling
period. (Calculated as 14Mb * 300 seconds = 4.2Gb). Hence the screwed up
results.

As Cisco do not seem to support 64-bit counters on this particular switch,
I was wondering if the situation would be improved by polling the device
more frequently ie. 60 seconds?

I have worked with mrtg for several years now and have developed some neat
html presentation during this time, hence the reluctance to migrate to the
rrdtool backend.  But maybe time has finally caught up with me.  Would
rrdtool overcome this situation even with 32-bit counters?

Appreciate your comments and thoughts,
___________________________________________________________
This message contains information intended only for named recipients.
If you have received this message in error, please delete it from your
system and notify the sender immediately by e-mail.
Information transmission via email cannot be guaranteed to be secure or
error-free. The sender does not accept liability for errors or omissions in
the contents of this message arising as a result of e-mail transmission
problems.


--
Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
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