Freddie Cash (via Nabble) schrieb: > On February 27, 2009 10:07 am mikelowrey wrote: > > I installed MRTG last week as described in MRTG 2.16.2 Linux/Unix > > Installation Guide. > > Everything works fine - I get data from my cisco fc switches and I can > > take a look of the statistics via browser. > > > > Today I compared the data from MRTG and the Fabric Manager Web client > > (from Cisco) and the differences of the collected data are pretty huge > > (up to 50%). In every case MRTG shows lower values. The values are > > updated in both cases every 5 minutes. > > Most SNMP counters are 32-bit, which means they have a max value of > around 4 > billion (packets, bytes, bits, whatever it's measuring). 5 minutes is a > *very* long time, and the counters can easily wrap around several times > during the time period. Which can lead to very misleading results. > > Either shorten your polling period to around 60 seconds, or change your > Target[] entries to use 64-bit counters (if they are available), or both. > > -- > Freddie > fjwc...@... > <http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2397366&i=0> > > _______________________________________________ > mrtg mailing list > m...@... > <http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2397366&i=1> > https://lists.oetiker.ch/cgi-bin/listinfo/mrtg > > > ------------------------------------------------------------------------ > This email is a reply to your post @ > http://n2.nabble.com/Wrong-Values-tp2397169p2397366.html > You can reply by email or by visting the link above. > Thanks for your reply.
How can I find out if the 64bit counters are available and how can I change this Target entries? Polling: Do I just need to change my crontab entry to every minute instead of every 5 minutes or do I need to change more? Thanks and sorry for beginner questions. rgds, Mike -- View this message in context: http://n2.nabble.com/Wrong-Values-tp2397169p2397549.html Sent from the MRTG Users Mailinglist mailing list archive at Nabble.com. _______________________________________________ mrtg mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/mrtg
